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         Although
                 raphite        is one of two naturally
                 solely of the element
                           both         graphite      and
                                                           carbon
                                                                           occurring
                                                                      (C), the other
                                                                 diamond       have
                                                                                         minerals


                                                                                        the
                                                                                                           comprised
                                                                                               being diamond.
                                                                                                same        chemical
                                                                                                                           40    700
                                                                                                                           2009a).
                                                                                                                                           tonnes
                                                                                                                                          Graphite's
                                                                                                                                                          valued           at
                                                                                                                                                                inert behaviour
                                                                                                                           chemicals and high melting point (3927°C) make it
                                                                                                                                                                                 $36     million
                                                                                                                                                                                              toward
                                                                                                                                                                                                        (Olson
                                                                                                                                                                                                         most


         composition,           they differ greatly in their internal arrangement                           of carbon      an      ideal            material         for        use     in:     the      steel
         atoms. A diamond crystal contains an exceptionally                                strong tetrahedral              manufacturing               process (it is added to molten steel
         framework            of carbon atoms, making it one of the hardest substances                                     to raise carbon content to meet various hardness
         on earth, In contrast,                   graphite       is formed      of stacked,         loosely bound          quality       standards),            refractory            linings    in electric
         layers composed of interconnected                          hexagonal rings of carbon atoms                        furnaces, containment                     vessels for carrying molten
         making        it one of the softest                 materials         known;     yet its linked ring              steel     throughout                 manufacturing                 plants,     and
         structure         can be used as a source of strength                         (Perkins 2002). These               casting ware to create a shaped end-product.                                      In
         fundamental            structural        differences       reflect the lower temperature                   and    addition,       graphite        is used as a foundry                   dressing,
         pressure          conditions         under        which      graphite        formed        compared         to    which assists in separating a cast object from its
         diamond.                                                                                                          mould following the cooling of hot metal. The
          Although graphite and diamond share the same carbon (C) chemistry, differences                                   automotive               industry        uses graphite          extensively       in
          in how their carbon atoms are arranged imparts several contrasting properties.                                   the     manufacture                 of    brake       linings        and     shoes.
                                                                                                                           Graphite is an effective lubricant over a wide range
                                                                                                                           of temperatures               and can be applied in the form of




                                                                                                                                           '~.
                                                                                                                                   End Uses of Graphite in the United States (2008)


                                                                                                                                                                                        o Refractories
                                                                                                                                           ~,,",
                                                                                                                                                                                        • 8teelmaking
                                                                                                                                                                                        o Brake Linings
                                                                                                                                                                                        • Other"

                      ~~
                      11          11                                                                                                 ~
                   I'I            I11        11    VanderWaals                                                                                                                     "Other includes: batteries,
                      ~L                           bonds                                                                                                                          stoppers,       sleeves,
                  ~   F-<~                                                                                                  Source: 0150n 2009b
                                                                                                                                                                                  nozzles, lubricants, pencils

            ,l~
                  F~>
            .carben atoms
            'e
                                   -'
                       covalent bonds
                                                                                                                           a dry powder or as a colloidal mixture
                                                                                                                           oil. Other
                                                                                                                           brushes for electric
                                                                                                                                                   uses include
                                                                                                                                                                    motors,
                                                                                                                                                                           electrodes
                                                                                                                                                                                  and moderators
                                                                                                                                                                                                in water or
                                                                                                                                                                                              in batteries,
                                                                                                                                                                                                             in
                                           Graphite                               Diamond
                                                                                                                           nuclear reactors. Graphite is used in the production
                       soft                                         hard                                                   of carbon fibre which strengthens components of
                       dirty to touch                               clean to touch                                         items like musical instruments     and lightweight
                       good electrical conductor                    non-electrical conductor                               sporting equipment (i.e., golf clubs, fishing rods,
                                                                                                                           bicycles, and tennis rackets). Graphite is also one
                       lubricant                                    abrasive
                                                                                                                           of the key components                       in the outer temperature
                       opaque                                       transparent
                                                                                                                           protective              system (i.e., heat protective                  tiles) of a
                       Value: hundreds of dollars per tonne         Value: millions of dollars per tonne
                                                                                                                           space shuttle (Dunn 2007).

          Physical Properties and Uses
          Graphite has the distinction of being the only non-metallic substance
          that is an efficient conductor of electricity. Its high thermal and
          electrical          conductivity,         soft     and      greasy         texture        (Iow    frictional
          resistance),          and structural             strength     are among its most appealing
          physical properties.              From pencils to steelmaking,                   graphite's versatile
          properties          make it suitable for a variety                   of everyday          and industrial
    , , fplications.             In 2006, the United States Geological Survey (USGS)
         'reported          US consumption                  of    natural      graphite        in    the    order     of
           . /?
,:;;.-    Minefal Commodity Profile No. 3                                                                                                                                                       Graphite/l
Graphite Types: Origin and Mode of Occurrence

Sedimentary rocks rich in decayed organic matter and limestone and
dolomite made of carbonate (CO)) compounds, serve as potential carbon
sources for graphite. Graphite deposits are formed when carbonaceous r----------------------,
rocks undergo various chemical and structural transformations via          World Graphite Reserve Base (2008)
metamorphism (elevated temperatures and pressures).
                                                                                                                 • China
                                                                                                                 D Czech Republic
Graphite deposits are typically grouped into three main textural types: 1)                                       III India
amorphous, 2) crystalline, and 3) flake. Amorphous graphite, as the name                                         • Mexico
suggests, has essentially no crystalline structure, consisting of particles                                      o Others'
so small that it maintains an earthy appearance. The amount of graphite
                                                                                               'Other countries include:
present in amorphous deposits depends on the amount of carbonaceous                            United   States.    Brazil.
                                                                                               Canada,     Madagasca~
(organic) material in the host rock. Amorphous material is typically                           North Korea, Norway, Sri
represented by fine-grained graphite disseminations and aggregates in Source: Olson 2009b      Lanka, Turkey, Ukraine

mildly   metamorphosed        carbonaceous    and carbonate-bearing     '-----------------------.1
sedimentary rocks (i.e., slate, shale, limestone, and dolomite).
Amorphous deposits typically contain up to 60% graphite.

Flake graphite comprises separate, flat, plate-like crystals (flakes) with
irregular to perfect hexagonal edges. It occurs as disseminations in r-------------------,
strongly metamorphosed rocks such as marble, gneiss, and schist.           World Production of Natural Graphite        (2007)
                                                                                                                 • China
Crystalline graphite deposits tend to be fairly pure often reflecting carbon                                     El India

contents in excess of 90%. Crystalline graphite occurs as massive                                                • Brazil
accumulations of flat, plate-like crystals with angular, rounded, or                                             • North Korea
                                                                                                                 !!I Canada
irregular edges in well-defined veins. Vein graphite is produced by the
                                                                                                                 o Others'
mixing of methane (CH.)-rich and carbon dioxide (C02)-rich fluids which
                                                                                                             'Other countries include:
react to form water (H20) and carbon (C). The C-O-H gas-fluid mixture                                        Czech Republic, Republic
                                                                                                             of Korea, Norway, Sri
transports carbon throughout fractured rock to favourable locations where                                    Lanka, Sweden, Turkey,
                                                                                                             Ukraine, Uzbekistan
it precipitates as veins of massive graphite. Vein deposits are commonly       Source: Olson 2009a & b

situated adjacent to contacts between hydrothermally altered limestone
                                                                               '----------------~---~
and plutonic rocks emplaced as high-temperature silica-rich melts.


World Resources and Production
In 2004, the USGSreported that 86% of the world's graphite resources consisted of amorphous material with almost all other
resources represented by flake (Taylor 2006). Sri Lanka is the only country with crystalline resources. According to preliminary
USGS statistics, the world's natural graphite resource base stood at 220 million tonnes in 2008 (Olson 2009b). USGSdata
indicates world production of natural graphite was just over 1.1 million tonnes for the same year with nearly 95% of global
supply sourced in just five countries. China is by far the most dominant force in the world's graphite supply industry, accounting
for 72% (800000 t) of world production, followed by India (130000 t), Brazil (76200 t), North Korea (30 000 t), and Canada
(28000 t) (Olson 2009a & b). In 2006, Canadian production originated from a mine and processing facility in the Province of
Quebec (Dumont 2008). Other known deposits from Quebec, Ontario, and British Columbia are reportedly in various stages of
exploration and development.

Reflective of strong demand from a metal-using economy in United States and an expanding domestic consumption in the
Chinese steel industry (Taylor 2006) the outlook for graphite was positive. It was predicted that China would become a
temporary net importer of graphite, a situation that would revive exploration and development opportunities for natural
graphite throughout the world, particularly in North America. The current economic slowdown is perpetuating the negative
trend that has plagued the global graphite market over most of the last decade. Consumption of graphite can be expected to
decrease as production of steel and automobiles declines. On the positive side, an expected growth in production of batteries in
hybrid vehicles could lead to a rise in demand for graphite over the next five to seven years (Merchant Research & Consulting,
Ltd. 2007).


Mineral Commodity Profile No. 3                                                                                       Graphite/2
Graphite in New Brunswick

          The early days

          Although not currently produced in New Brunswick, graphite has, from
          time to time, sparked interest in the exploration and development
          community, particularly in the Saint John area. Evidence of exploration
          and development          interest is recorded in descriptions of several former
          19th century mining ventures that operated in the eastern part of the
          city. Some graphite was produced from two small deposits at Marble
          Cove-Split       Rock     (near     The      Reversing          Falls)     and   Botsford.     An
          entertaining      and informative            account      of these past enterprises             is
          presented by Gwen Martin in her book, 'Gesner's Dream: The trials and
          triumphs      of early mining in New Brunswick' (Martin 2003; pp. 65-67
          and 168-69).

          With the support of several prominent members of the city's business
          community, the first of three reported graphite mines in the Marble
          Cove-Split Rock area was established in 1850 by the Saint John Mining
          Company. Under the direction                 of an imported              British mine captain,
          local miners extracted and dispatched several hundred tons of hand-
          picked       ore during    the     mine's        first   year   of operation.         Production
          continued until 1860. Following the death of a key company official, the
          operation        was     abandoned.          Under        the     direction      of     American
          entrepreneurs,         two other graphite            mining ventures         in the Split Rock
          area emerged. These operations were short-lived,                           catapulting    into the
                                                                                                               Amorphous graphite at Marble Cove-Split Rock in Saint
           historical record by 1873. Old workings of these former enterprises are
                                                                                                               John, N.B.
           still visible at low tide on the north bank of the Saint John River, a few
           hundred metres downstream                of the Reversing Falls Visitor Information
           Centre. Another graphite mine, the Botsford Mine, also known as the
           Mayes Mine, was established around 1880. It occupied property a few
           hundred       metres     north      of    the      former      Marble       Cove-Split      Rock
           operation(s).     Until the late 1880s, the Botsford Mine was considered
           Canada's most productive graphite mine. For nearly a decade, up to 10
           tons of hand-picked ore was extracted and processed on a daily basis.
           Severe flooding forced an end to operations                       in 1889. Another mine,
           very near the Botsford operation,                 opened in 1891 under the name St.
           John    Plumbago         Company.         Despite       having      established         American
           markets for its product, trade restrictions                 and other obstacles resulted
           in permanent          closure in 1908. This failed enterprise                    was the last
           attempt to mine graphite in New Brunswick (Martin 2003).


           The Golden Grove graphite prospect

           The    most     extensive       and      best     studied      graphite      deposit     in New
           Brunswick is situated approximately 24 km northeast of Saint John,
           near Golden Grove. In general, the deposit consists of a steeply
          _dipping graphitic zone hosted in Neoproterozoic carbonates (limestone
<,         and dolomite)      and quartzite of the Ashburn Formation. Ashburn strata
           at this location occur as a roof pendant within mafic (gabbro) to felsic
           (~iorite,    granodiorite)       plutonic       rocks of the Golden Grove Intrusive
       'O,I}~uite. The Golden Grove deposit has been known for over 70 years;
                                                                                                               Amorphous graphite at Mill Creek, N.B.
     - ~"-however,       there are no records of work for the property                          until it was
           visited by Provincial Geologist, W.J. Wright in 1937. The main graphite

                                                                                                                                                         Graphite/3
           Mineral Commodity         Profile No. 3
showing at Golden Grove, visible in a 14-foot [4.3 m] deep shaft, was                         Mountain      Formation           and   similar   rocks     of   the
described by Wright as a near-vertical        "lead [vein] of graphite" up to 53              Silurian Burtts Corner and Digdeguash formations.
inches   [1.3     m] wide, found       associated     with   dark grey crystalline            A few occurrences are reported in Early to Late
limestone     very near its contact       with intrusive       granitic   rock (Wright        Carboniferous    carbonaceous sedimentary                    rocks,
1939). A sample representing            roughly two-thirds         of "better    looking      particularly  from areas near prominent                      thrust
[vein]   material"    assayed at 31. 74% graphite.           Considering that most            faults.
graphite ore worked in Canada at that time ranged between 10 and
                                                                                              Several minor graphite occurrences are noted in
15%, significant interest was shown in the Golden Grove deposit.
                                                                                              areas of northern New Brunswick. The Miramichi
Another sample from a former ore dump adjacent the shaft assayed                              and the     northern      part of the Tobique-Chaleur
37.31 % carbon. The textural properties of the graphite were examined                         geologic    terranes      display favourable  geologic
and it was concluded that the graphite existed as "thin, ragged flakes"                       settings for graphite as an accessory                    to various
and any attempt        to establish    a marketable      concentrate       would most         forms of sulphide mineralization.
likely result in a very low recoveries of a very fine graphitic dust (Wright
1939).                                                                                        Summary
No further    interest was shown in the property until it was acquired 42                     Graphite occurrences recorded in New Brunswick
years later by Glenvet Resources Ltd. In 1982, Glenvet prepared                           a   range from amorphous- to flake-type,  reflecting
detailed geologic map of the property,             undertook     various geophysical          the thermal    effects of low- to high-grade
investigations,      dug several      trenches,     and conducted         metallurgical       metamorphism         on       organic-rich,          carbonaceous
testing of sampled material. Initial metallurgical           test results were quite          sedimentary and carbonate rocks. On a regional
encouraging,       suggesting   an acceptable         graphite     product      could be      scale, favoured geologic settings for the formation
produced from the deposit (Anderle 1987; Tremblay and RiddeIl1987).                           of graphite are areas where potential carbon-
                                                                                              source rocks are found at or very near the fractured
A follow-up     22-hole drilling and trenching         program to investigate        the      perimeter of plutonic rocks. Graphite is found as an
deposit at depth confirmed         the existence of two main graphite zones                   accessory mineral locally in suitable host rocks near
with a total indicated geological reserve of 24 535 tonnes of 22.37%                          major     regional   fault        systems.    With    one or two
graphitic    carbon (Tremblay      and Riddell 1987).          It was subsequently            exceptions,     most         of    these     reported      graphite
concluded that such a reserve was inadequate to support a commercial                          occurrences must be considered limited in size and
viable operation       at that time.     Additional    work on the deposit          was       value in light of present industry standards and
recommended          but no further work was undertaken.            Little interest has       end-uses.     Favourable          geologic    settings     in some
been shown in the deposit since 1987.                                                         areas of New Brunswick suggest possibilities for
                                                                                              extending    the resource   base of amorphous
Other occurrences                                                                             graphite with limited potential for higher quality
                                                                                              flake material.
Amorphous         graphite   occurrences     in southern        IIew Brunswick      are
                                                                                              Selected References
locally associated with carbonaceous              shales of the Ordovician Kendall
                                                                                                 Anderle, J.P. 1987. Summary progress report for
                                                                                              Glenvet Resources Limited, Golden Grove graphite
                                                                                              deposit, 21 H/05 (September, 1986-February, 1987).
                                                                                              New Brunswick Department of Natural Resources;
                                                                                              Minerals, Policy and Planning Division, Mineral Report
                                                                                              of Work, 473383, 92 p.
                                                                                                  Clark, T.H. 1921. The origin of graphite. Economic
                                                                                              Geology, 26, No. 3, pp. 167-183.
                                                                                                 Dumont, M. 2008. Graphite. In Canada Minerals
                                                                                              Yearbook 2007. http://www.nrcan.gc.ca/mms-smm/
                                                                                              busi-indu/cmy-amc/content/2007               /29. pdf     (accessed
                                                                                              January 2009).
                                                                                                  Dunn, S. 2007. Conversion of organic matter to
                                                                                              graphite during metamorphism. In The Annual Five-
                                                                                              College Geology Faculty Symposium abstracts,
                                                                                              Department of Geology and Geography, Mount
                                                                                              Holyoke College, South Hadley, Massachusetts, USA.
                                                                                              http://www.science.smith.edu/
                                                                                              departments/Geology/5Cgeology/
                                                                                              Faculty/FacSym07.pdf (accessed January 2009).
 Flake graphite at Golden Grove near Saint John. N.B.
                                                                                                                                                    Graphite/5
Mineral Commodity Profile No. 3
Johnson, S.c., McLeod, M.J., Barr, S.M., and White, C.E. 2005. Bedrock geology of the Saint John area (NTS 21 G/08), Saint John,
Kings, Queens, and Charlotte counties, New Brunswick. New Brunswick Department of Natural Resources; Minerals, Policy and
Planning Division, Plate 2005-3l.
    Martin G.L. 2003. Gesner's Dream: the trials and triumphs of early mining in New Brunswick. Canadian Institute of Mining,
Metallurgy and Petroleum - New Brunswick Branch/G.L. Martin, Fredericton, New Brunswick, pp. 65-67 and 168-169.
    Merchant Research & Consulting, Ltd. 2007. Demand for graphite will be governed by lithium-ion battery market, Birmingham
United Kingdom. http://www.mcgroup.co.uk/researches/G/04/Graphite%20Market%20Research.html(accessed                    January 2009).
    Mitchell, C.J. 1993. Flake graphite. Industrial Minerals Laboratory Manual, British Geological Survey, Technical Report WG/92/30,
Mineralogy and Petrology Series, 35 p.
    New Brunswick         Department       of Natural     Resources.     2009a.      Mineral     Occurrence   Database.      http://dnre
-mrne.gnb.ca/mineraloccurrence      (accessed January 2009).
    New Brunswick         Department       of Natural      Resources.     2009b.      Industrial    Mineral   Database.      http://dnre
-mrne.gnb.ca/industrialmineraloccurrence      (under development).
    Olson, D.W. 2009a. Graphite [Advance Release]. In 2007 Minerals Yearbook. United States Geological Survey.
http://minerals. usgs.gov/minerals/pubs/commodity/graphite/myb         1-2007-graph. pdf (accessed January 2009).
    Olson, D.W. 2009b. Graphite           (Natural).  In Mineral Commodity           Summaries,     United States Geological Survey.
http://minerals. usgs. gov/minerals/pubs/commodity/graphite/mcs-2009-graph.           pdf (accessed January 2009).
    Perkins, D. 2002. Mineralogy, 2"dEdition. Prentice Hall Publishers, New Jersey, p. 56.
    Spence, H.S. 1920. Graphite. Canada Department of Mines, Mines Branch, No. 511, 197 p.
    Taylor, H.A. 2006. Graphite. In Industrial minerals and rocks (7th Edition). Edited by J.M. Kogel, N.C. Trivedi, J.M. Barker, and S.T.
Krukowski. Society of Mining and Metallurgy, and Exploration Inc., pp. 507-518.
    Taylor, HA 2008. Graphite Advocate News. Detailed Outlook Issue No. 30 (May 2008). http://www.basicsmines.com/graphite
(accessed January 2009).
    Tremblay, J.H., and Riddell, W.J. 1987. Report on the Golden Grove deposit for Glenvet Resources Limited, Saint John (March
1987), New Brunswick. New Brunswick Department of Natural Resources; Minerals, Policy and Planning Division, unpublished report,
38 p.
    Wright, W.J. 1939. Report of Provincial Geologist: lead, zinc, copper, gold, silver, nickel, manganese, graphite, coal, antimony, and
molybdenum. One Hundred and Second Annual Report of the Department of Lands and Mines for 1938. Province of New Brunswick,
pp. 67-76.


For More Information
For more information on graphite and other New Brunswick mineral commodities, please see the NBDNR Mineral Occurrence
Database (NBDNR 2009a) and Industrial Mineral Database (NBDNR 2009b), or contact:

Tim C. Webb, P. Geo.
Industrial Minerals Geologist
Tim. Webb@gnb.ca
Telephone:   506.453.2206

Geological Surveys Branch
Minerals, Policy and Planning Division
New Brunswick Department of Natural Resources
PO Box 6000
Fredericton, NB
 E3B 5Hl

Recommended citation:        Webb, T.C. and Stewart, H.J. 2009. Graphite. New Brunswick             Department    of Natural Resources;
Minerals, Policy and Planning Division, Mineral Commodity Profile No. 3,6 p.




Mineral   Commodity   Profile No. 3
                                                                                                                            Graphite/6
,
                                            ~,



                                                                                                          ---x'i                                                                                 N

                                                                                                                                                                                             A
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                                                                                    ,
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                                                                                                                                      x
                                                                                                      


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                                                                                                  , ,

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                                                                                          ,"                     '
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                                                                                  I                       X                 ',


                                                                      r
                                                                          f
                                                                              f                                                  
                                                                                                                                     --,
                                                                  ,
                                                                  f


                                                              ,                                                                                                    -'T---
                                                                                                                                                                               .
                                                              f


  •      Amorphous *                                         ,                                                                                                             
                                                                                                                                                                               ,
                                                         ,
                                                         f

                                                                                                                                                                      /'       ,

                                                                                                                                                             ,'.
      1. Botsford Mine                               ,
                                                     f


      2. Clover Hill                             f
                                                                                                                                                             16 "
      3. Dipper Harbour                                                                                                                                      ,
      4. Dumbarton                                                                                                                                      ,,
      5. Frenchmans Creek
      6. Fuller Brook
      7. Goose River
      8. Hainesville
      9. Lily Lake (Gilbert) Mine
      10. Marble Cove-Split Rock
      11. Mill Creek
      12. New Jerusalem                                                                                                                                                            0"'
                                                                                                                                                                                   __     =__ Kilometres
                                                                                                                                                                                            3=='~0
      13. Reversing Falls
      14. Rollingdam
      15. Sand Brook
      16. Thome Brook
      17. Titus Mills
      18. Wirral


  •      Flake *
      19. Fort Howe
      20. Golden Grove


  x      Unclassified**
      Annidale-North Fuchsite Zone        McMaster                                                                                         Skull Showing
      Annidale-South Fuchsite Zone        McNeill Brook                                                                                    Southeast Upsalquitch River
      Astraburn                           Middle River West                                                                                Spig Brook
      Bear Lake                           Millstream-Henry                                                                                 Stewart
      Blakeney Mine                       Millstream                                                                                       Swamp Lake Brook
      Captain West                        Millstream 1                                                                                     Taylors Brook
      Clarks Brook "I"                    Millstream Henry East                                                                            Tiblemont
      Clearwater Lake                     Millstream Henry Far East                                                                        Todd Mountain
      CoacStream                          Millstream-Great Northern                                                                        Upsalq uitch Lake
      Discovery Zone                      Moose Lake                                                                                       West Wedge
      East Scotch Settlement- B.P. (1)    Mullin Stream                                                                                    White Birch Brook
      East Scotch Settlement- B.P. (2)    Napadogan                                                                                        Zarina
      Eel River                           Nashwaak
      Elmtree 14                          Nepisiguit "A"
      Free Grant 0                        Nepisiguit River "I"
      Gaspereau Bridge Brook              Northeast Nackawic River
      Gordon Meadow Brook                 Portage Lake
      Hachey                              Robertville 1
      Jake Lee Brook                      Robertville 2
      London Settlement                   Rocky Brook
      Lorneville                          Sand burn Brook
      Louvicort North                     Sand burn Brook North
      Lower Forty Four Mile Brook         Sevogle Strip
                                          Sewell Brook
                                                                                                                                                                                         * see   NBDNR 2009a
      MAD RAN
                                          Sheephouse Brook                                                                                                                           **see       NBDNR 2009b
      Madran


Figure1.      Location of selected New Brunswlck graphite occurrences.


Mineral Commodity Profile No. 3                                                                                                                                                                                Graphite/4

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Graphite NB-Golden Gove Report

  • 1. G Although raphite is one of two naturally solely of the element both graphite and carbon occurring (C), the other diamond have minerals the comprised being diamond. same chemical 40 700 2009a). tonnes Graphite's valued at inert behaviour chemicals and high melting point (3927°C) make it $36 million toward (Olson most composition, they differ greatly in their internal arrangement of carbon an ideal material for use in: the steel atoms. A diamond crystal contains an exceptionally strong tetrahedral manufacturing process (it is added to molten steel framework of carbon atoms, making it one of the hardest substances to raise carbon content to meet various hardness on earth, In contrast, graphite is formed of stacked, loosely bound quality standards), refractory linings in electric layers composed of interconnected hexagonal rings of carbon atoms furnaces, containment vessels for carrying molten making it one of the softest materials known; yet its linked ring steel throughout manufacturing plants, and structure can be used as a source of strength (Perkins 2002). These casting ware to create a shaped end-product. In fundamental structural differences reflect the lower temperature and addition, graphite is used as a foundry dressing, pressure conditions under which graphite formed compared to which assists in separating a cast object from its diamond. mould following the cooling of hot metal. The Although graphite and diamond share the same carbon (C) chemistry, differences automotive industry uses graphite extensively in in how their carbon atoms are arranged imparts several contrasting properties. the manufacture of brake linings and shoes. Graphite is an effective lubricant over a wide range of temperatures and can be applied in the form of '~. End Uses of Graphite in the United States (2008) o Refractories ~,,", • 8teelmaking o Brake Linings • Other" ~~ 11 11 ~ I'I I11 11 VanderWaals "Other includes: batteries, ~L bonds stoppers, sleeves, ~ F-<~ Source: 0150n 2009b nozzles, lubricants, pencils ,l~ F~> .carben atoms 'e -' covalent bonds a dry powder or as a colloidal mixture oil. Other brushes for electric uses include motors, electrodes and moderators in water or in batteries, in Graphite Diamond nuclear reactors. Graphite is used in the production soft hard of carbon fibre which strengthens components of dirty to touch clean to touch items like musical instruments and lightweight good electrical conductor non-electrical conductor sporting equipment (i.e., golf clubs, fishing rods, bicycles, and tennis rackets). Graphite is also one lubricant abrasive of the key components in the outer temperature opaque transparent protective system (i.e., heat protective tiles) of a Value: hundreds of dollars per tonne Value: millions of dollars per tonne space shuttle (Dunn 2007). Physical Properties and Uses Graphite has the distinction of being the only non-metallic substance that is an efficient conductor of electricity. Its high thermal and electrical conductivity, soft and greasy texture (Iow frictional resistance), and structural strength are among its most appealing physical properties. From pencils to steelmaking, graphite's versatile properties make it suitable for a variety of everyday and industrial , , fplications. In 2006, the United States Geological Survey (USGS) 'reported US consumption of natural graphite in the order of . /? ,:;;.- Minefal Commodity Profile No. 3 Graphite/l
  • 2. Graphite Types: Origin and Mode of Occurrence Sedimentary rocks rich in decayed organic matter and limestone and dolomite made of carbonate (CO)) compounds, serve as potential carbon sources for graphite. Graphite deposits are formed when carbonaceous r----------------------, rocks undergo various chemical and structural transformations via World Graphite Reserve Base (2008) metamorphism (elevated temperatures and pressures). • China D Czech Republic Graphite deposits are typically grouped into three main textural types: 1) III India amorphous, 2) crystalline, and 3) flake. Amorphous graphite, as the name • Mexico suggests, has essentially no crystalline structure, consisting of particles o Others' so small that it maintains an earthy appearance. The amount of graphite 'Other countries include: present in amorphous deposits depends on the amount of carbonaceous United States. Brazil. Canada, Madagasca~ (organic) material in the host rock. Amorphous material is typically North Korea, Norway, Sri represented by fine-grained graphite disseminations and aggregates in Source: Olson 2009b Lanka, Turkey, Ukraine mildly metamorphosed carbonaceous and carbonate-bearing '-----------------------.1 sedimentary rocks (i.e., slate, shale, limestone, and dolomite). Amorphous deposits typically contain up to 60% graphite. Flake graphite comprises separate, flat, plate-like crystals (flakes) with irregular to perfect hexagonal edges. It occurs as disseminations in r-------------------, strongly metamorphosed rocks such as marble, gneiss, and schist. World Production of Natural Graphite (2007) • China Crystalline graphite deposits tend to be fairly pure often reflecting carbon El India contents in excess of 90%. Crystalline graphite occurs as massive • Brazil accumulations of flat, plate-like crystals with angular, rounded, or • North Korea !!I Canada irregular edges in well-defined veins. Vein graphite is produced by the o Others' mixing of methane (CH.)-rich and carbon dioxide (C02)-rich fluids which 'Other countries include: react to form water (H20) and carbon (C). The C-O-H gas-fluid mixture Czech Republic, Republic of Korea, Norway, Sri transports carbon throughout fractured rock to favourable locations where Lanka, Sweden, Turkey, Ukraine, Uzbekistan it precipitates as veins of massive graphite. Vein deposits are commonly Source: Olson 2009a & b situated adjacent to contacts between hydrothermally altered limestone '----------------~---~ and plutonic rocks emplaced as high-temperature silica-rich melts. World Resources and Production In 2004, the USGSreported that 86% of the world's graphite resources consisted of amorphous material with almost all other resources represented by flake (Taylor 2006). Sri Lanka is the only country with crystalline resources. According to preliminary USGS statistics, the world's natural graphite resource base stood at 220 million tonnes in 2008 (Olson 2009b). USGSdata indicates world production of natural graphite was just over 1.1 million tonnes for the same year with nearly 95% of global supply sourced in just five countries. China is by far the most dominant force in the world's graphite supply industry, accounting for 72% (800000 t) of world production, followed by India (130000 t), Brazil (76200 t), North Korea (30 000 t), and Canada (28000 t) (Olson 2009a & b). In 2006, Canadian production originated from a mine and processing facility in the Province of Quebec (Dumont 2008). Other known deposits from Quebec, Ontario, and British Columbia are reportedly in various stages of exploration and development. Reflective of strong demand from a metal-using economy in United States and an expanding domestic consumption in the Chinese steel industry (Taylor 2006) the outlook for graphite was positive. It was predicted that China would become a temporary net importer of graphite, a situation that would revive exploration and development opportunities for natural graphite throughout the world, particularly in North America. The current economic slowdown is perpetuating the negative trend that has plagued the global graphite market over most of the last decade. Consumption of graphite can be expected to decrease as production of steel and automobiles declines. On the positive side, an expected growth in production of batteries in hybrid vehicles could lead to a rise in demand for graphite over the next five to seven years (Merchant Research & Consulting, Ltd. 2007). Mineral Commodity Profile No. 3 Graphite/2
  • 3. Graphite in New Brunswick The early days Although not currently produced in New Brunswick, graphite has, from time to time, sparked interest in the exploration and development community, particularly in the Saint John area. Evidence of exploration and development interest is recorded in descriptions of several former 19th century mining ventures that operated in the eastern part of the city. Some graphite was produced from two small deposits at Marble Cove-Split Rock (near The Reversing Falls) and Botsford. An entertaining and informative account of these past enterprises is presented by Gwen Martin in her book, 'Gesner's Dream: The trials and triumphs of early mining in New Brunswick' (Martin 2003; pp. 65-67 and 168-69). With the support of several prominent members of the city's business community, the first of three reported graphite mines in the Marble Cove-Split Rock area was established in 1850 by the Saint John Mining Company. Under the direction of an imported British mine captain, local miners extracted and dispatched several hundred tons of hand- picked ore during the mine's first year of operation. Production continued until 1860. Following the death of a key company official, the operation was abandoned. Under the direction of American entrepreneurs, two other graphite mining ventures in the Split Rock area emerged. These operations were short-lived, catapulting into the Amorphous graphite at Marble Cove-Split Rock in Saint historical record by 1873. Old workings of these former enterprises are John, N.B. still visible at low tide on the north bank of the Saint John River, a few hundred metres downstream of the Reversing Falls Visitor Information Centre. Another graphite mine, the Botsford Mine, also known as the Mayes Mine, was established around 1880. It occupied property a few hundred metres north of the former Marble Cove-Split Rock operation(s). Until the late 1880s, the Botsford Mine was considered Canada's most productive graphite mine. For nearly a decade, up to 10 tons of hand-picked ore was extracted and processed on a daily basis. Severe flooding forced an end to operations in 1889. Another mine, very near the Botsford operation, opened in 1891 under the name St. John Plumbago Company. Despite having established American markets for its product, trade restrictions and other obstacles resulted in permanent closure in 1908. This failed enterprise was the last attempt to mine graphite in New Brunswick (Martin 2003). The Golden Grove graphite prospect The most extensive and best studied graphite deposit in New Brunswick is situated approximately 24 km northeast of Saint John, near Golden Grove. In general, the deposit consists of a steeply _dipping graphitic zone hosted in Neoproterozoic carbonates (limestone <, and dolomite) and quartzite of the Ashburn Formation. Ashburn strata at this location occur as a roof pendant within mafic (gabbro) to felsic (~iorite, granodiorite) plutonic rocks of the Golden Grove Intrusive 'O,I}~uite. The Golden Grove deposit has been known for over 70 years; Amorphous graphite at Mill Creek, N.B. - ~"-however, there are no records of work for the property until it was visited by Provincial Geologist, W.J. Wright in 1937. The main graphite Graphite/3 Mineral Commodity Profile No. 3
  • 4. showing at Golden Grove, visible in a 14-foot [4.3 m] deep shaft, was Mountain Formation and similar rocks of the described by Wright as a near-vertical "lead [vein] of graphite" up to 53 Silurian Burtts Corner and Digdeguash formations. inches [1.3 m] wide, found associated with dark grey crystalline A few occurrences are reported in Early to Late limestone very near its contact with intrusive granitic rock (Wright Carboniferous carbonaceous sedimentary rocks, 1939). A sample representing roughly two-thirds of "better looking particularly from areas near prominent thrust [vein] material" assayed at 31. 74% graphite. Considering that most faults. graphite ore worked in Canada at that time ranged between 10 and Several minor graphite occurrences are noted in 15%, significant interest was shown in the Golden Grove deposit. areas of northern New Brunswick. The Miramichi Another sample from a former ore dump adjacent the shaft assayed and the northern part of the Tobique-Chaleur 37.31 % carbon. The textural properties of the graphite were examined geologic terranes display favourable geologic and it was concluded that the graphite existed as "thin, ragged flakes" settings for graphite as an accessory to various and any attempt to establish a marketable concentrate would most forms of sulphide mineralization. likely result in a very low recoveries of a very fine graphitic dust (Wright 1939). Summary No further interest was shown in the property until it was acquired 42 Graphite occurrences recorded in New Brunswick years later by Glenvet Resources Ltd. In 1982, Glenvet prepared a range from amorphous- to flake-type, reflecting detailed geologic map of the property, undertook various geophysical the thermal effects of low- to high-grade investigations, dug several trenches, and conducted metallurgical metamorphism on organic-rich, carbonaceous testing of sampled material. Initial metallurgical test results were quite sedimentary and carbonate rocks. On a regional encouraging, suggesting an acceptable graphite product could be scale, favoured geologic settings for the formation produced from the deposit (Anderle 1987; Tremblay and RiddeIl1987). of graphite are areas where potential carbon- source rocks are found at or very near the fractured A follow-up 22-hole drilling and trenching program to investigate the perimeter of plutonic rocks. Graphite is found as an deposit at depth confirmed the existence of two main graphite zones accessory mineral locally in suitable host rocks near with a total indicated geological reserve of 24 535 tonnes of 22.37% major regional fault systems. With one or two graphitic carbon (Tremblay and Riddell 1987). It was subsequently exceptions, most of these reported graphite concluded that such a reserve was inadequate to support a commercial occurrences must be considered limited in size and viable operation at that time. Additional work on the deposit was value in light of present industry standards and recommended but no further work was undertaken. Little interest has end-uses. Favourable geologic settings in some been shown in the deposit since 1987. areas of New Brunswick suggest possibilities for extending the resource base of amorphous Other occurrences graphite with limited potential for higher quality flake material. Amorphous graphite occurrences in southern IIew Brunswick are Selected References locally associated with carbonaceous shales of the Ordovician Kendall Anderle, J.P. 1987. Summary progress report for Glenvet Resources Limited, Golden Grove graphite deposit, 21 H/05 (September, 1986-February, 1987). New Brunswick Department of Natural Resources; Minerals, Policy and Planning Division, Mineral Report of Work, 473383, 92 p. Clark, T.H. 1921. The origin of graphite. Economic Geology, 26, No. 3, pp. 167-183. Dumont, M. 2008. Graphite. In Canada Minerals Yearbook 2007. http://www.nrcan.gc.ca/mms-smm/ busi-indu/cmy-amc/content/2007 /29. pdf (accessed January 2009). Dunn, S. 2007. Conversion of organic matter to graphite during metamorphism. In The Annual Five- College Geology Faculty Symposium abstracts, Department of Geology and Geography, Mount Holyoke College, South Hadley, Massachusetts, USA. http://www.science.smith.edu/ departments/Geology/5Cgeology/ Faculty/FacSym07.pdf (accessed January 2009). Flake graphite at Golden Grove near Saint John. N.B. Graphite/5 Mineral Commodity Profile No. 3
  • 5. Johnson, S.c., McLeod, M.J., Barr, S.M., and White, C.E. 2005. Bedrock geology of the Saint John area (NTS 21 G/08), Saint John, Kings, Queens, and Charlotte counties, New Brunswick. New Brunswick Department of Natural Resources; Minerals, Policy and Planning Division, Plate 2005-3l. Martin G.L. 2003. Gesner's Dream: the trials and triumphs of early mining in New Brunswick. Canadian Institute of Mining, Metallurgy and Petroleum - New Brunswick Branch/G.L. Martin, Fredericton, New Brunswick, pp. 65-67 and 168-169. Merchant Research & Consulting, Ltd. 2007. Demand for graphite will be governed by lithium-ion battery market, Birmingham United Kingdom. http://www.mcgroup.co.uk/researches/G/04/Graphite%20Market%20Research.html(accessed January 2009). Mitchell, C.J. 1993. Flake graphite. Industrial Minerals Laboratory Manual, British Geological Survey, Technical Report WG/92/30, Mineralogy and Petrology Series, 35 p. New Brunswick Department of Natural Resources. 2009a. Mineral Occurrence Database. http://dnre -mrne.gnb.ca/mineraloccurrence (accessed January 2009). New Brunswick Department of Natural Resources. 2009b. Industrial Mineral Database. http://dnre -mrne.gnb.ca/industrialmineraloccurrence (under development). Olson, D.W. 2009a. Graphite [Advance Release]. In 2007 Minerals Yearbook. United States Geological Survey. http://minerals. usgs.gov/minerals/pubs/commodity/graphite/myb 1-2007-graph. pdf (accessed January 2009). Olson, D.W. 2009b. Graphite (Natural). In Mineral Commodity Summaries, United States Geological Survey. http://minerals. usgs. gov/minerals/pubs/commodity/graphite/mcs-2009-graph. pdf (accessed January 2009). Perkins, D. 2002. Mineralogy, 2"dEdition. Prentice Hall Publishers, New Jersey, p. 56. Spence, H.S. 1920. Graphite. Canada Department of Mines, Mines Branch, No. 511, 197 p. Taylor, H.A. 2006. Graphite. In Industrial minerals and rocks (7th Edition). Edited by J.M. Kogel, N.C. Trivedi, J.M. Barker, and S.T. Krukowski. Society of Mining and Metallurgy, and Exploration Inc., pp. 507-518. Taylor, HA 2008. Graphite Advocate News. Detailed Outlook Issue No. 30 (May 2008). http://www.basicsmines.com/graphite (accessed January 2009). Tremblay, J.H., and Riddell, W.J. 1987. Report on the Golden Grove deposit for Glenvet Resources Limited, Saint John (March 1987), New Brunswick. New Brunswick Department of Natural Resources; Minerals, Policy and Planning Division, unpublished report, 38 p. Wright, W.J. 1939. Report of Provincial Geologist: lead, zinc, copper, gold, silver, nickel, manganese, graphite, coal, antimony, and molybdenum. One Hundred and Second Annual Report of the Department of Lands and Mines for 1938. Province of New Brunswick, pp. 67-76. For More Information For more information on graphite and other New Brunswick mineral commodities, please see the NBDNR Mineral Occurrence Database (NBDNR 2009a) and Industrial Mineral Database (NBDNR 2009b), or contact: Tim C. Webb, P. Geo. Industrial Minerals Geologist Tim. Webb@gnb.ca Telephone: 506.453.2206 Geological Surveys Branch Minerals, Policy and Planning Division New Brunswick Department of Natural Resources PO Box 6000 Fredericton, NB E3B 5Hl Recommended citation: Webb, T.C. and Stewart, H.J. 2009. Graphite. New Brunswick Department of Natural Resources; Minerals, Policy and Planning Division, Mineral Commodity Profile No. 3,6 p. Mineral Commodity Profile No. 3 Graphite/6
  • 6. , ~, ---x'i N A ',- , , , ~x __- - - -- ,, , ~xx x*' 'x-- x x , x ,/ , , , 0#"';/ ," ' , ,, f ' I X ', r f f --, , f , -'T--- . f • Amorphous * , , , f /' , ,'. 1. Botsford Mine , f 2. Clover Hill f 16 " 3. Dipper Harbour , 4. Dumbarton ,, 5. Frenchmans Creek 6. Fuller Brook 7. Goose River 8. Hainesville 9. Lily Lake (Gilbert) Mine 10. Marble Cove-Split Rock 11. Mill Creek 12. New Jerusalem 0"' __ =__ Kilometres 3=='~0 13. Reversing Falls 14. Rollingdam 15. Sand Brook 16. Thome Brook 17. Titus Mills 18. Wirral • Flake * 19. Fort Howe 20. Golden Grove x Unclassified** Annidale-North Fuchsite Zone McMaster Skull Showing Annidale-South Fuchsite Zone McNeill Brook Southeast Upsalquitch River Astraburn Middle River West Spig Brook Bear Lake Millstream-Henry Stewart Blakeney Mine Millstream Swamp Lake Brook Captain West Millstream 1 Taylors Brook Clarks Brook "I" Millstream Henry East Tiblemont Clearwater Lake Millstream Henry Far East Todd Mountain CoacStream Millstream-Great Northern Upsalq uitch Lake Discovery Zone Moose Lake West Wedge East Scotch Settlement- B.P. (1) Mullin Stream White Birch Brook East Scotch Settlement- B.P. (2) Napadogan Zarina Eel River Nashwaak Elmtree 14 Nepisiguit "A" Free Grant 0 Nepisiguit River "I" Gaspereau Bridge Brook Northeast Nackawic River Gordon Meadow Brook Portage Lake Hachey Robertville 1 Jake Lee Brook Robertville 2 London Settlement Rocky Brook Lorneville Sand burn Brook Louvicort North Sand burn Brook North Lower Forty Four Mile Brook Sevogle Strip Sewell Brook * see NBDNR 2009a MAD RAN Sheephouse Brook **see NBDNR 2009b Madran Figure1. Location of selected New Brunswlck graphite occurrences. Mineral Commodity Profile No. 3 Graphite/4