 | | Journal (article/letter/editorial) | | Example from the GecoMine, ManitouwadgeDistrict, Ontario, Canada ERICH U. PETERSEN Departmentof Geologyand...Gecoorebodyis approached: districtwide cordierite-gedrite gneisses (10-30 ppm), feeder zone (50-330 ppm)...theGecodepositisdeveloped in whichthedistrictwide cordierite-gedrite gneisses representone segmentof the fossilhydrothermalsystemandin...massive sulfidedeposits arethe majorsource of tin in Canada(e.g.,KiddCreekandSullivan;Mulligan, 1975). Tin... Gecovolcanogenic massive sulfidedeposit.The Geco mine is well suitedfor a studyof massivesulfide-related |  | | Journal (article/letter/editorial) | | volcanogenic massive sulphide camp: Manitouwadge, Ontario, Canada Yuanming Pan a, M i c h a e l E. Fleet b ... Sask. STN OWO, Canada bDepartment of Earth Sciences, University of Western Ontario, London, Ont. N6A...N6A 5BZ Canada Received 12 April 1994; revised version accepted 20 February 1995 Abstract Cordierite-orthoamphibole...massive sulphide (VMS) deposits at Manitouwadge, Ontario. Trace-element characteristics, particularly those...presence of orthoamphiboles (anthophyllite and gedrite) with Al-rich phases, particularly cordierite (and |  | | Journal (article/letter/editorial) | | SuperiorProvince,Ontario EVA ZALESKI Continental Geoscience Division,Geological Surveyof Canada,Ottawa,Ontario,CanadaKiA...synvolcanic alteration(Schandl the Winston Lake Zn-Cu mine near Schreiber(Schandlet et al., 1991; Davis et...metasedimentary-migmatitic Queticosubprovince (Fig. The Geco mine, which dosed in November 1995, was the 1). Despiteits...wasundertaken by Pye (1957)for the Ontario Historical nomenclature--the "mine series" Department of Mines.He...sector geologists whohaveadopted thehistorical "mine rocksalongtheinnerandoutermargins of thefoldedsupra- |  | | Journal (article/letter/editorial) | | reported the occurrence of h6gbomite in cordierite-gedrite-phlogopite schist, hornblendite and massive amphibolite...M562 Geco, Ontario Ph, Crd, St, Zgpl, Gd, Crn, Ru, Py, Ccp, Zr, HSg, Nig M6522 Geco, Ontario Ph,...M1772 Geco, Ontario Ph, Crd, St, ZSpl, Gd, Mag, llm, Py, Po, Ccp, Zr, H~g PGS-IO01 Geco, Ontario Crd...corundum; Cu cummingtonite; Gn galena; Grt garnet; Gd gedrite; Hog h~gbomite; llm ilmenite; Mag magnetite; Mu...s* * ~ " o : .*** ~ Mg o r ," * ' a l i - ~ mine Total Fe Fie. 2. Ternary plot showing the composition |  | | Journal (article/letter/editorial) | | Benson Mine District, Adirondack Mountains, New York and the Manitouwadge Massive Sulfide District, Ontario...Ontario, Canada, we have found several h6gbomite occurrences and believe that h6gbomite is more widespread...aluruinous rocks than previously recognized. At Benson Mine, an iron-rich h6gbomite (H6g) occurs with K-feldspar-magnetite...Manitouwadge, F e - Z n h6gbomite is found with gedrite-eordierite-staurolite-hercynite-magnetite_+ quartz...utilized in specific reactions. H6gbomite from Benson Mine has an 8H structure type, while that at Manitouwadge |  | | Journal (article/letter/editorial) | | 38, pp. 511-524 (2000) GENESIS OF CORDIERITE – GEDRITE GNEISSES, CENTRAL METASEDIMENTARY BELT BOUNDARY...BOUNDARY THRUST ZONE, GRENVILLE PROVINCE, ONTARIO, CANADA WILLIAM H. PECK§ AND JOHN W. VALLEY Department of...Wisconsin 53706, U.S.A. ABSTRACT Cordierite- and gedrite-bearing lithologies crop out along the base of...Metasedimentary Belt boundary thrust zone (CMBbtz) in Ontario, the boundary between the Central Metasedimentary...whole-rock d18O and chemical composition of cordierite–gedrite rocks in the CMBbtz indicate that these rocks represent |  | | Journal (article/letter/editorial) | | they form thin lens-shaped bodies composed of gedrite and sparse anthophyllite, T oligoclase (An13-An20)...coupled with δ18O values of 9.45 ± 0.6‰ (VSMOW) from gedrite separates, support an origin from a basalt protolith...composed of IP T the prograde mineral assemblage gedrite + oligoclase (An13-An20) + biotite + magnetite...Anthophyllite exsolution lamellae in M host gedrite are present and formed during retrograde metamorphism...orthoamphibole group. Most of the grains analyzed are gedrite that have 6.09-6.91 atoms of Si per formula unit |  | Heimann, A., Spry, P. G., Teale, G. S., Jacobson, C. E. (2006) CORONAS, SYMPLECTITIC TEXTURES, AND REACTIONS INVOLVING ALUMINOUS MINERALS IN GEDRITE - CORDIERITE - GARNET GNEISS FROM EVERGREEN, FRONT RANGE, COLORADO. The Canadian Mineralogist, 44 (5) 1025-1044 doi:10.2113/gscanmin.44.5.1025 | Journal (article/letter/editorial) | | AND REACTIONS INVOLVING ALUMINOUS MINERALS IN GEDRITE – CORDIERITE – GARNET GNEISS FROM EVERGREEN, FRONT...University, Ames, Iowa 50011–3212, U.S.A. ABSTRACT Gedrite – cordierite – garnet gneisses metamorphosed to...minerals (“corona” association) are separated from gedrite (ged), cordierite, garnet (grt), and quartz (qtz)...cordierite such that they are nowhere in contact with gedrite and garnet. Zincian hercynite – cordierite symplectites...suggest the following reactions, derived from gedrite + sillimanite: ged + sil = crd + grt; ged + sil |  | | Journal (article/letter/editorial) | | Garnet-Stilpnomelane Rocks at Redstone, Timmins, Ontario D. J. ROBINSON Westmin ResourcesLimited, 25 Adelaide...Adelaide Street East, Suite 1400, Toronto, Ontario M5C 1Y2, Canada Abstract Silicatefaciesiron-formation...inclusionsin Mn garnet and at the University of Western Ontario. Trace in theserocksvariessystematically with the... 1798 D. J. ROBINSON / •, • QUEBEC %2ø // ONTARIO • '• ABITIBI Abitibi Greenstone Belt + + +...depositsas at Geco, may be interpretedas an alterationproduct of a Manitouwadge,Ontario (Friesen et al |  | | Journal (article/letter/editorial) | | Mg-rich minerals such as phlogopite, anthophyllite, gedrite, tremolite, forsterite, cummingtonite, sapphirine...Caledonides (Spry & Scott 1986b), the Linda deposit, Canada (Zaleski et al. 1991), and the Mamandur deposit...minerals in twelve massive sulfide deposits and in gedrite–cordierite rocks near the town of Evergreen. The...Mountain and Cotopaxi deposits and the Grape Creek district near Canyon City and noted the intimate association...considered small, with the largest being the Sedalia mine, which contained about 1.2 million tonnes of ore |  | | Journal (article/letter/editorial) | | Manitoba, Canada R3T 2N2. Peralkaline rocks of the Mont Saint-Hilaire Complex (QuCbec, Canada) are well...R. A. Gault, Canadian Museum of Nature, Ottawa, Canada KIP 6P4. We recently chemically analyzed the amphibole...the Tory Hill-Wilberforce area, Monmouth Township, Ontario, became (silicic) fluor-edenite in 1978, only...sodicgedrite is relatively common at the Geco mine, Manitowadge, Ontario, and can be found at the Fishtail Lake...Lake occurrence, Harcourt, Ontario. Some notable inconsistenciesare: (1) Not all British Columbian “nephrite” |  | | Journal (article/letter/editorial) | | chlorite, sapphirine, cordierite, orthopyroxene, gedrite, anthophyllite, spinel-hercynite, and rutile. Hoegbomite...+_spinel symplectites from the breakdown of the gedrite-sillimanite association. The original assemblage...formed at pressures between 7 and 9 kbar, where gedrite-sillimanite was stable in the Kiranur rocks (Ackermand...orthopyroxene, and in NazO-bearing systems, to gedrite as well. The shift to lower temperatures and pressures...orthoenstatite and the orthoamphiboles anthophyllite and gedrite and are thus shown dashed. The extension (dashed) |  | | Journal (article/letter/editorial) | | middle amphibolite facies Montauban deposit in Canada. As at many other deposits, ductile deformation...University of Calgary, Calgary, Alberta T2N 1N4, Canada A. G. Tomkins (*) School of Geosciences, Monash...City in the Grenville Province of southern Quebec, Canada (Fig. 1a). It was mined sporadically between 1910...Calumet is located 90 km northwest of Ottawa in Canada and is also thought to be a volcanic massive sulphide...of granodioritic to gabbroic composition. In the mine area, these metamorphic rocks strike roughly north–south |  | | Journal (article/letter/editorial) | | affected by externally derived fluids. In cordierite-gedrite gneisses, carbon isotopes of cordierite (Crd) are...likely analogs for protoliths of many cordierite-gedrite rocks. Igneous cordierite from granitic plutons...Pikwitonei granulite domain (Superior Province, Canada) and Brattstrand Bluffs (East Antarctica) suggest...Tables 1 and 2 (and references therein). Cordierite-gedrite gneiss localities: B = Bondy Gneiss Complex, F...sediments (Chappell and White 1992) and cordierite-gedrite gneisses and related rocks that are thought to |  | | Journal (article/letter/editorial) | | examples. Key words: anthophyllite; ferric iron; gedrite; NCKFMASHTO; pseudosection; whiteschist. Mineral...cummingtonite; di, diopside; ep, epidote; g, garnet; ged, gedrite; gl, glaucophane; H2O, aqueous fluid; hb, hornblende;...is one of the diagnostic distinctions between gedrite and anthophyllite (Robinson et al., 1971, 1982;... Na has to be included in the model system if gedrite is involved, or if coexisting orthoamphibole and...and aandr ¼ 3. The adjustments to the DfH of the gedrite (ged) and orthomagnesiopargasite (ompa) endmembers |  | | Journal (article/letter/editorial) | | +cordierite + biotite _+garnet _+anthophyllite/gedrite _+staurolite _+sillimanite_+plagioclase (with abundant...chlorite - cordierite - cummingtonite - garnet - gedrite - kyanite - orthopyroxene compositions of Malene...metamorphic cordierite-orthoamphibole (anthophyllite/gedrite) rocks (hereafter COR). Such rocks are of considerable...Froese E (1969) Metamorphic rocks from the Coronation Mine and surrounding area. Geol Surv Can Pap 68-5 : 55-77...mineralogy of Precambrian paleosols at Elliot Lake, Ontario, Canada. Precambrian Res 12:349-373 Gee RD, Myers JS |  | Basson, I.J., McCall, M.-J., Andrew, J., Daweti, E. (2018) Structural controls on mineralisation at the Namib Lead and Zinc Mine, Damara Belt, Namibia. Ore Geology Reviews, 95. 931-944 doi:10.1016/j.oregeorev.2018.03.028 | Journal (article/letter/editorial) | | Controls on Mineralisation at the Namib Lead and Zinc Mine, Damara Belt, Namibia I.J. Basson, M.-J. McCall...Controls on Mineralisation at the Namib Lead and Zinc Mine, Damara Belt, Namibia, Ore Geology Reviews (2018)...Controls on Mineralisation at the Namib Lead and Zinc Mine, Damara Belt, Namibia I.J. Bassona,c,*, M.-J. McCalla...Africa Abstract The Namib Lead and Zinc (Pb-Zn) Mine is hosted within the Karibib Formation of the Swakop...Introduction The Namib Pb-Zn Mine, previously known as the Deblin Mine, is situated east of Swakopmund |  | | Journal (article/letter/editorial) | | anthophyllites, and only one can be considered a gedrite (Fig. 8A). The XMg ratio shows little variation...sites analyzed. variable Si contents ranging from gedrite to high-Si anthophyllite. This compositional variation...variation without a compositional gap between gedrite and anthophyllite suggests that the orthoamphiboles...anthophyllite-cordierite rocks of this study, anthophyllite and gedrite never coexisted as separate phases, and instead...above the anthophyllite-gedrite solvus, that is, to the right of the reaction gedrite + anthophyllite = orthoamphibole |  | Rosenberg, J. L., Spry, P. G., Jacobson, C. E., Vokes, F. M. (2000) The effects of sulfidation and oxidation during metamorphism on compositionally varied rocks adjacent to the Bleikvassli Zn-Pb-(Cu) deposit, Nordland, Norway. Mineralium Deposita, 35 (8) 714-726 doi:10.1007/s001260050274 | Journal (article/letter/editorial) | | footwall and hanging wall at the 86 Mt Geco copper±zinc deposit, Ontario. It should be stressed that the zonation...around the much larger Ducktown (Nesbitt 1982) and Geco (Petersen 1984) deposits. Preliminary work by Spry...sulfidation±oxidation reactions in the Linda deposit of Manitoba, Canada. Geologic setting The Bleikvassli Zn±Pb±(Cu) deposit...1-kmthick unit locally referred to as the ``Mine Sequence.'' The Mine Sequence contains a heterogeneous succession...feldspathic gneisses, and amphibolites (Fig. 1). The lower Mine Sequence contains the orebody and is dominated by |  | | Journal (article/letter/editorial) | | supracrustalrocksmetamorphosed to the upper amphibolitefacies.The mine sequenceat the north gold zone consistsof nodular...ratiosincreasesymmetricallyaway from the ore zone. The mine sequenceis interpreted asa metamorphosed exhala...gold deposit being mined in the Grenville province,Canada. Lead and zinc mineralization was first discovered...body of gold-silvermineralizationnorth of the old mine workings(McAdamandFlanagan,1976) andbegan mining...its characteristicsin terms of the metamorphism. District Geology tholeiitic affinity characteristicof |  | Roberts, M. D., Oliver, N. H. S., Fairclough, M. C., Holtta, P. S., Lahtinen, R. (2003) Geochemical and Oxygen Isotope Signature of Sea-FloorAlteration Associated with a Polydeformed and Highly Metamorphosed MassiveSulfide Deposit, Ruostesuo, Central Finland. Economic Geology, 98 (3) 535-556 doi:10.2113/gsecongeo.98.3.535 | Journal (article/letter/editorial) | | Massive sulfide deposits in the Vihanti-Pyhäsalmi district, central Finland, are hosted by a highly deformed...massive sulfide deposits in the Vihanti-Pyhäsalmi district and exploration strategies that couple chemostratigraphy...isotope mapping is a viable exploration tool in the district and in other mineralized upper amphibolite to...districts (e.g., Manitouwadge greenstone belt, Ontario, Canada; Zaleski and † Corresponding author: e-mail...the Proterozoic Vihanti-Pyhäsalmi metallogenic district of central Finland, numerous massive sulfide occurrences |  | | Book (volume) | | Introduction Mg-Fe—Mn-Li Amphiboles Anthophyllite—Gedrite Holmquistite—Ferro-holmquistite Cummingtonite—Grunerite...Mineral Sciences; Mineralogical Association of Canada for diagrams from Canadian Mineralogist, Elsevier...American Mineralogist; National Research Council of Canada for diagrams from Canadian Journal of Earth Sciences;...Iron-magnesium-manganese amphiboles Anthophyllite-gedrite (Mg,Fe**)7_5Alp_2[Sig ¢Alp _2022](OH,F)» Holmquistite...and (Al,Fe**). For the (Ca,Na)-poor amphiboles, gedrite is related to anthophyllite by the substitution |  | | Report (issue) | | PAPER 69-45 GEOLOGICAL SURVEY OF CANADA DEPARTMENT OF ENERGY, MINES AND RESOURCES A CATALOGUE OF...MINERALS R. J. Traill ' GEOLOGICAL SURVEY OF CANADA CANADA PAPER 69-45 A CATALOGUE OF CANADIAN MINERALS...n's Printer, Ottawa from the Geological Survey of Canada 601 Booth St., Ottawa and Canadian Government bookshops...to change without notic e Queen ' s Printer for Canada Ottawa 1970 A CATALOGUE OF CANADIAN MINERALS...has elapsed since T . Sterry Hunt in Geology of Canada, 1863 , presented the first descriptive list of |  | | Book | | CA 94804-1659 Earth Treasures trom the Royal Ontario Museum ie es ¥ ¥ A> i ; \ Pig era , . ... Gems«Minerals Earth Treasures from the Royal Ontario Museum Gems & Minerals reveals the beauty and splendor...and minerals from the collection of the Royal Ontario Museum in Toronto. Minerals and gems form naturally... -Gems« Minerals Earth Treasures from the Royal Ontario Museum Dr. Bicriberly Tait 20 v|Meu? FIREFLY...Photographs copyright © 2011 Royal Ontario Museum, Toronto, Ontario, Canada. All rights reserved. No part |  | | Journal (article/letter/editorial) | | Archean granite-greenstone terrane in the northeast district of Botswana. The belt consists of polymetamorphosed...unusual gahnite-formingreaction, Geco basemetal d'eposit,Manitouwadge,Ontario. Canadian Mineralogist 20' 549-553'...paragenesisfrom northern BushG. (1986) A httgbomite-spinel-gedrite manland, Namaqua mobile belt, South Africa. NeuesJahrbuchfiir |
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