 | | Report (issue) | | GOVERN YOUR USE OF THIS DOCUMENT Your use of this Ontario Geological Survey document (the âContentâ) is governed... copyright is held by the Queenâs Printer for Ontario. It is recommended that reference to the Content... . ; Ontario Geological Survey, ...670-5691 Toll Free: 1-888-415-9845, ext. 5691 (inside Canada, United States) Local: (705) 670-5691 Toll Free:...(inside Canada, United States) Local: (416) 326-2678 Toll Free: 1-800-668-9938 (inside Canada, United |  | | Journal (issue) | | Rocks and Minerals of Ontario -- H f ONTARIO DEPARTMENT OF MINES AND NORTHERN AFFAIRS Honourable...and Minerals of Ontario By D. F. HEWITT Chief, Industrial Mineral Section Ontario Department of Mines...Early Precambrian pillow lavas; Munekun Lake, District of Kenora. (Courtesy L. D. Ayres). Lower right:... (Courtesy The International Nickel Company of Canada, Limited). Centre left: Eurypterus lacustris, an...about 400 m.y. ago; Welland County. (Courtesy Shell Canada Ltd.). right: left: â â â Centre right: Archaeocrinus |  | | Journal (article/letter/editorial) | | HighlyMetamorphosed Volcanogenie Massive SulfideDeposits: Geco,Canada,andPalmeir6polis, Brazil SYLVIAM. AKâ˘uJO*, STEVEND...University of Toronto, 22 Russell Street,Toronto, Ontario,CanadaM5S3B1 ANDFREDJ. LONGSTAFFE Department of...University of Western Ontario,Biological andGeological Building, London, Ontario,CanadaN6A5B7 Abstract...Abstract ThelargeGeco,Canada, andsmallPalmeir6polis, Brazil,Precambrian metamorphosed volcanogenie massivesulfide...Palmeir6polis facilitated isotopic reequilibration. At Geco,the muchlargeralteration zonewasaneffectively closed |  | | 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) | | Example from the GecoMine, ManitouwadgeDistrict, Ontario, Canada ERICH U. PETERSEN Departmentof Geologyand...Mg-Fe-richaluminous rocksandare associated with Zn staurolite,corundum, cordieritc,sillimanite,(Zn, Fe) spinels...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...abundances in various rock typesassociated with the Geco massivesulfide ores and reported that cassiteriteis |  | | Report (issue) | | 02 )ÎŁ=0.99 (Al2.01 Si0.01 )ÎŁ=2.02 O4 . (2) Geco mine, Canada; by electron microprobe, average of six points...nigerite, phlogopite, staurolite, cordierite, pyrite, chalcopyrite (Geco mine, Canada). Distribution: Many... Abundant at Falun, Sweden. From the Silberberg mine, near Bodenmais, Bavaria, Germany. At Tiriolo, near...Cotopaxi mine, Fremont Co., Colorado. In Canada, found at the Geco mine, Manitouwadge, Ontario; in Hudson...Hudson township, Quebec; and elsewhere. In Brazil, from the Alto do Giz pegmatite, near Parelhas, Rio Grande |  | | Report (issue) | | Energy, Mines and Resources Canada E:nergie, Mines et Ressourees Canada Canada THE ENERGY OF OUR RESOURCES...POWER OF OUR IDEAS COVER Left: Amethyst - Thunder Bay, Ontario. Specimen measures 4.5 cm across the base...no. 17206. GSC 204971-1 Geological Survey of Canada Miscellaneous Report 49 ROCKS AND MINERALS FOR... Š Minister of Supply and Services Canada 1991 Available in Canada through authorized bookstore agents...bookstores or by mail from Canada Communication Group - Publishing Ottawa, Canada KIA OS9 and from. Geological |  | | Journal (article/letter/editorial) | | Kaolinitic Precursor: Evidence from the Geco Mine, Manitouwadge,Ontario R. L. STANTON Departmentof Geology...someof the gneisses of the Gecoorebody,Manitouwadge,Ontario. Theseare a colorlessto pale brown translucentmaterial...observed in drill core from the Geco mine, Manitouwadge, Ontario. The Geco Deposit The Gecoorebody,situatedin...situatedin the Manitouwadge area of Ontario just north of Lake Superior(Fig. 1) is now recognizedas a major...metavolcanicrockslocatednear the SILLIMANITE DERIVATION, GECO MINE, ONTARIO boundarybetween the Quetico and Abitibi-Wawa |  | | Journal (article/letter/editorial) | | Clay-Chlorite Precursor: Evidencefrom the Geco Mine, Manitouwadge,Ontario R. L. STANTON Delâ˘artmentof Geologyand...hasbeen observedin drill core from the Geco mine, Manitouwadge,Ontario. Detailed electronmicroprobeanalysisshowsthe...it is suggestedhere that, at least in the caseof Geco, it representsan earlier formedsubstance fromwh...mineralogyof the stratiform Gecodepositat Manitouwadge, Ontario,hasrevealed a creamyyellowto palepinknear-isotropic...establishment fides. to the cordierite associated with the Geco sul- of thisprincipleandin indicatingthe natureof |  | | Journal (article/letter/editorial) | | Department of Geology, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario, Canada M5S 2C6 Received November...Kidd Creek, Geco and Winston Lake massive sulfide deposits, in the Superior Province of Ontario, shows that...years after volcanism. Monazite from Kidd Creek mine is 2659 __ 3 Ma old, in agreement with spatially...old rutile. Monazite from a biotite schist at Geco mine gives a similar age of 2661 _+ ! Ma. However,...from a sericite schist, which hosts the ore at Geco mine, is 2675 _+ 2 Ma old. Abraded large monazite grains |  | | 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...particularly cordierite (and A12SiO5 phases, garnet, and staurolite), and other minerals, including biotite, plagioclase |  | | Report (issue) | | GOVERN YOUR USE OF THIS DOCUMENT Your use of this Ontario Geological Survey document (the âContentâ) is governed... copyright is held by the Queenâs Printer for Ontario. It is recommended that reference to the Content... . ; Ontario Geological Survey, ...670-5691 Toll Free: 1-888-415-9845, ext. 5691 (inside Canada, United States) Local: (705) 670-5691 Toll Free:...(inside Canada, United States) Local: (416) 326-2678 Toll Free: 1-800-668-9938 (inside Canada, United |  | | Journal (article/letter/editorial) | | the Manitouwadge MiningCamp,Superior Province, Canada: A PotentialExploration Tool? EVA S. SCHANDL, MICHAEL...University of Toronto, 22 Russell Street,Toronto, Ontario,CanadaM5S3B1 AND HARDOLPH A. WASTENEYS Department... RoyalOntarioMuseum, 100 Queen's Park,Toronto,Ontario,CanadaM5S3C6 Abstract Traceandrareearthelement(REE)...units:maficvolcanic rocks,acidvolcanic tuffs,anddacites. The Geco,Willroy,Willecho,andBigNamaCreekCu-Zn-Agdeposits...wasobserved in the fblsicvolcanic rocksaroundthe Geco, Willroy,andWillechodeposits. Thepositive correlation |  | Beaudoin, G., Mercier-Langevin, P., Dube, B., Taylor, B. E. (2014) Low-Temperature Alteration at the World-Class LaRonde Penna Archean Au-Rich Volcanogenic Massive Sulfide Deposit, Abitibi Subprovince, Quebec, Canada: Evidence from Whole-Rock Oxygen Isotopes. Economic Geology, 109 (1) 167-182 doi:10.2113/econgeo.109.1.167 | Journal (article/letter/editorial) | | Massive Sulfide Deposit, Abitibi Subprovince, Quebec, Canada: Evidence from Whole-Rock Oxygen Isotopes* Georges...QuĂŠbec, QC, Canada G1V 0A6 2 Geological Survey of Canada, 490 de la Couronne, QuĂŠbec, QC, Canada G1K 9A9...9A9 3 Geological Survey of Canada, 601 Booth Street, Ottawa, ON, Canada K1A 0E8 Abstract The oxygen isotope...from that of the other VMS deposits of their host district, and a number of them are hosted by transitional...Georges.Beaudoin@ggl.ulaval.ca *Geological Survey of Canada contribution 20110346. 0361-0128/14/4184/167-16 |  | | 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...n h6gbomite is found with gedrite-eordierite-staurolite-hercynite-magnetite_+ quartz + ilmenite _+futile...utilized in specific reactions. H6gbomite from Benson Mine has an 8H structure type, while that at Manitouwadge |  | | Journal (article/letter/editorial) | | Universityof Alberta, Edmonton,Alberta T6G 2E3, Canada Abstract Calibratedequilibriaare presentedwhichdocumentthe...MBgGraphite _ / / f⢠Fe-Mg Silicates at Geco, near Manitouwadge,Ontario (Petersen, 1984). The roles of temperature...bcaring silicatessuch as biotite, garnet, chlorite, staurolite, and amphibole steadily decrease from and/oroxygento...exampleof variationsin silicateassemblages in and At Geco,on one sideof the depositthe Xv⢠valuesof aroundmetamorphosed...quartz _ sillimanite,garnet Ducktown,Tennessee,district(Brown,1960; Nesbitt, decreasesteadilytoward the |  | | Journal (article/letter/editorial) | | Departmentof Geology,Universityof Toronto,Toronto,Ontario, CanadaM5S 1A1 Abstract Zincianspinel [(Zn,Fe...reaction of zinc-bearingsilicate(e.g., biotite and staurolite)to form spinelduringmetamorphism (Stoddard,1979;...respectively.Calculatedvaluesof AH, AS, and AGâ˘' mine the likely originof spinelin a numberof local- at...the rare oxide hiSgbomite,along with zincian staurolite, magnetite,quartz,pyrrhotite, galena,and rutile...contactbetweenZincianspineland magnetite(Fig. 5a). Staurolite,whichcontainsapproximately 2.8 wt percentZnO |  | | Journal (article/letter/editorial) | | 1985. Rinted in U.S.A. The Hemlo gold deposit, Ontario: A geochemical and isotopic study and K.mKo HATTORI**...EION M.CAMERoN*.t *Geological Survey of Canada, Ottawa, Ontario Kl A OE8 **Department of Geology, University...University of Ottawa, Ottawa. Ontario KIN 6N5 tDerry Laboratory for Sedimentary Geochemistry and Ore Deposits...1985) Abstract-The Hemlo deposit, near Marathon, Ontario, is one of the largest gold deposits in North America...INTRODUCTION THE HEMLO GOLD DEPOSIT near Marathon, Ontario was discovered in 198 1, although there is a long |  | | Journal (article/letter/editorial) | | 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...sericite; Sil sillimanite; Sp sphalerite; St staurolite; ZBpl zincian spinel; Zr zircon; [ B p ~ (1982);...s* * ~ " o : .*** ~ Mg o r ," * ' a l i - ~ mine Total Fe Fie. 2. Ternary plot showing the composition...(Gamsberg, Geco, Black Mountain and Broken Hill): crosses represent h6gbomite from the Benson iron mine (Petersen |  | | 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 / â˘, ⢠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) | | Garnet-gahnite-staurolite relations 105 N. Jb. Miner. Abh. 2007, Vol. 184/1, p. 105â116, Stuttgart...Schweizerbartâsche Verlagsbuchhandlung 2007 Garnet-gahnite-staurolite relations and occurrence of ecandrewsite from...with coexisting porphyroblasts of garnet and staurolite (zinc-bearing) was studied in metamorphosed syn-volcanic...Betul Belt, central India. Gahnite and zincian staurolite are the product of desulfidation of primary sphalerite...conditions. Key words: gahnite, ecandrewsite, zincian staurolite, hydrothermal alteration, Betul Belt. Introduction |  | | Report (volume) | | quadrangle in northern Minnesota and southern Ontario has been studied in cooperation with the Minnesota...international border separating Minnesota and Ontario and lies within the southern part of the Archean...greenschistfacies metamorphism; the Vermilion district is located within this subprovince, southeast...at an elevation of 150m above the surface. In Ontario, data were taken from northsouth surveys flown...elevation of about 300m by the Geological Survey of Canada. In the southwestern part of the area, data were |  | Corfu, F., Muir, T.L. (1989) The Hemlo-Heron Bay greenstone belt and Hemlo Auî¸Mo deposit, Superior Province, Ontario, Canada 2. Timing of metamorphism, alteration and Au mineralization from titanite, rutile, and monazite Uî¸Pb geochronology. Chemical Geology: Isotope Geoscience section, 79 (3). 201-223 doi:10.1016/0168-9622(89)90030-4 | Journal (article/letter/editorial) | | Hemlo-Heron Bay greenstone belt and Hemlo AU-MO deposit, Superior Province, Ontario, Canada 2. Timing of...U-Pb geochronology F. CORFU Ontario Geological Survey, c/o Department Ontario Geological (Received December...revised Ontario Museum, Toronto, Ont. M7A 1 W4 (Canada) and accepted May Ont. M5S 2C6 (Canada) 3,1989)...T.L., 1989. The Hemlo-Heron Bay greenstone belt and Hemlo Ontario, Canada, 2. Timing of metamorphism,...igneous evolution of the Late Archean Hemlo-Heron Bay greenstone belt. This paper is aimed principally |  | 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) | | ferromagnesian silicates (biotite, garnet, and staurolite) in and adjacent to the metamorphosed Bleikvassli...distinguished by the common presence of zinc-bearing staurolite (up to 9 wt% ZnO) coexisting with biotite  garnet...Introduction Ferromagnesian silicates such as garnet, staurolite, biotite, amphibole, cordierite, and chlorite...footwall and hanging wall at the 86 Mt Geco copperÂązinc deposit, Ontario. It should be stressed that the zonation...reÂŻected in the composition of biotite, garnet, staurolite, and chlorite in the heterogeneous suite of host |  | | 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 |
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