 | | Journal (article/letter/editorial) | | pages 1905-1909, 1991 Miissbauer spectra of minnesotaite and ferroan talc J.M.D. Corv, T. Blxls* Department...Arsrru.cr Mdssbauer spectra of five samples of minnesotaite and one of ferroan talc have been recordedat...quadrupolesplitting L:2J4 mm/s is observedin all minnesotaite samples at room temperature. The ferroan talc...smaller quadrupole splitting, A : 2.55 mm/s. All minnesotaite samplesorder antiferromagnetically,with N6el...to 4.2 K. Two distinct ferrous populations in minnesotaite are inferred from the resolved magneticallysplit |  | | Journal (article/letter/editorial) | | byJames(1954; 1955) on various iron-forlnationsin the Lake Superior of lninerals in iron-formations, of related...diagenetic and possibly Iron Formation in the Schefferville,Quebecarea, providefurtherinputinto the model...sedimentaryfaciesof iron-forlnation sulfide in the Lake Superiordistrict: the sulfide,silicate, facies...westernedge of the Laborador Trough, Newfoundland,Canada, and tabulation of the most SEDIMENTstRY •tND...• 0.1 to 0.2 and Na • formula Chamosite 4 Minnesotaite (Fe•+, A1)6(Si, A1)40•0(OH), • 4 Fe.?Si40•o(OH)• |  | | Journal (article/letter/editorial) | | inverted tetrahedra in the interlayer regions. Minnesotaite having Fe/(Fe + Mg) : 0.92 exhibits electron-diffraction...tetrahedral strips are more abundant in the minnesotaite having Fel(Fe + Mg) : 0.80, and a strip l0 tetrahedra...(n/10)a along the a axis in the primitive-cell minnesotaite. Local variations of B* values are also associatedwith...cell (C cell) (Guggenheim and Eggleton, 1986). Minnesotaite is one of the most abundant Fe-rich sheet However...minerals and synthetic materials (e.g., Buseck and minnesotaite has been difrcult becauseit occurs as fine- |  | | Journal (article/letter/editorial) | | Ga (e.g., those of the Lake Superior region, U.S.A., Labrador Trough, Canada, and the Nabberu Basin of...stilpnomelane, and riebeckite, and locally pyrite. Minnesotaite is a common, very low-grade metamorphic reaction...iron-formations of the younger Lake Superior region, U.S.A., and the Labrador Trough, Canada, are commonly 1473...iron-formations in the Rapitan Group, Yukon and N.W.T., Canada; in the Urucum region, Brazil; and in the Damara...those of and chert deposited from seawater. the Lake Superior region in the U.S.A. and the Labrador Other |  | | Journal (article/letter/editorial) | | magnetite-richassociationswhich include: quartz, magnetite, minnesotaite,riebeckite,stilpnomelane,dolomite (or ankerite)...siderite, dolomite (or ankerite), stilpnomelane,minnesotaite,pyrrhotite and/or pyrite, and small amountsof...considerablycoarsergrainedthan quartz. Fibrous minnesotaite commonly cuts acrosscarbonatesand stilpnomelanereflectingits...suchare present.The carbonates, stilpnomelane, and minnesotaite show considerable solid solution. and riebeckite...common in the SokomanIron Formation in Labrador, Canada(Klein and Fink, 1976),the Biwabik Iron Formation |  | | Journal (article/letter/editorial) | | samples as fine-grained laths intergrown with minnesotaite in magnetite microbands. In more altered chert-magnetite...stilpnomelane are intergrown with sulphides. Minnesotaite also occurs as colourless grains associated...pyrrhotite; e photomicrograph showing development of minnesotaite (acicular grains, Minn) along siderite– quartz...Silicate Quartz Chlorite Stilpnomelane Muscovite Minnesotaite Plagioclase Epidote Actinolite Carbonate Siderite...schist. They include magnetite, quartz (chert), minnesotaite and siderite in the BIF, and chlorite, actinolite |  | | Journal (article/letter/editorial) | | assemblages stilpnomelane-zussmanite-chlorite-minnesotaite, stilpnomelane-zussmanite-chlorite-grunerite...Precambrian iron-formations. Greenalite and minnesotaite are index minerals in the lowest metamorphic...silicates such as greenalite, chamosite, and minnesotaite. However, it is absent from higher grade rocks...r t z _ magnetite _ siderite stilpnomelane- minnesotaite- q u a r t z _ magnetite ___siderite stilpnomelane...r t z - magnetite stilpnomelane- grunerite- minnesotaite- quartz - +_magnetite stilpnomelane- chlorite- |  | | Journal (article/letter/editorial) | | Regionalmetamorphism of Proterozoic LabradorTrough,Canada ConNnus KUIN Department of Geology, Indianq Uniuersity...magnetite,hematite,greenalite,stilpnomelane,and minnesotaite. Amphibolitefaciesiron-formationcontainsabundantFe-Mg...rTrough approximately l2 miles south of Sawbill Lake (Fig. l). This isograd probably is the northernmostexpressionof...(1960) in the Bloom Lake area, by Kranck (1961) in the Mount Reed and Hobdad Lake areas,by Klein (1966)in...carbonate-hematite; seeJames,1954,and from MenihekLake,but minnesotaite x - K l e i n o n d F i n k ,1 9 7 6 tr - Lesher |  | | Journal (article/letter/editorial) | | Weld Range:(l) bandediron-formation containing minnesotaite, siderite, quarlz,magnetite, greenalite, stilpnomelane...stilpnomelane, siderite, greenalite, pyrite, magnetite, minnesotaite, and quartz with trace amounts of ilmenite,...reaction of earlier silicates and siderite to form minnesotaite are common. The assemblageminnesotaite-quar...approxirnatedecreasingorder of abundance, are minnesotaite,siderite, qtJartz,magnetite,greenalite, stilpnomelane...stilpnomelane,siderite,greenalite,pyrite, magnetite,minnesotaite,and quartz. Trace amounts of ilmenite, chalcopyrite |  | | Journal (article/letter/editorial) | | with the structurally distinct minnesotaite. Keywords Talc · Minnesotaite · Banded iron formations · Mössbauer...intergrowths of talc and the Fe-rich mineral minnesotaite. This interpretation is supported by the study...and minnesotaite with 0.91 based on the presumed isothermal formation of talc-opal-minnesotaite spherulites...It was previously believed that the mineral minnesotaite was the ferrous iron analogue of talc, starting...single-crystal X-ray diffraction studies that the minnesotaite structure was modulated and not the same as |  | | Book | | Netherlands Distributors for the United States and Canada. ELSEVIER SCIENCE PUBLISHING INC 52, Vanderbilt...five of the great iron districts of the world - Lake Superior, Hamersley, Labrador Trough and its extensions...and several, notably those of Lake Superior, the Ungava belt of Canada, and of the Transvaal Supergroup...Newfoundland, St. Johns, Newfoundland A1B 3 x 5 , Canada. A.D.T. GOODE Exploration Department, BHP Pty...Geological Survey of Canada, 6 0 1 Booth Street, Ottawa, Ontario K1A OE8. Canada. W.D.M. HALL Broken |  | | Journal (article/letter/editorial) | | (1972) Klein, C.J.: Greenalite, stilpnomelane, minnesotaite, crocidolite and carbonates in a very low-grade...petrology of the Sokoman iron formation near Ardua Lake, Quebec. Can. Journ. of Earth Sci. 15:480-500...the Nemeiben ultramafic complex, Saskatchewan, Canada. Mineral. Deposita 16:409-424 (1981) Mercier, J...River ultramafic body, Cassiar, British Columbia, Canada. J. Petrol. 18:567-594 (1977) Ramdohr, P.: A widespread...Nickel distribution in serpentinites from Puddy Lake, Ontario. Proc. Geol. Assoc. Can. 18:67-91 (1967) |  | | Journal (article/letter/editorial) | | A1203 - SiO2 - TiO2 - HzO - COs. Atomic Energy of Canada Ltd. Tech Rep TR-377, Available from SSDO AECL...39:35-53 Klein C (1974) Greenalite, stilpnomelane, minnesotaite, crocidolite and carbonates in a very low-grade...of Proterozoic iron-formation, Labrador Trough, Canada. Am Mineral 63:898-912 Klein C, Fink RP (1976)...petrology of the Sokoman Iron Formation near Ardua Lake, Quebec. Can J Earth Sci 15:480500 Machamer JF...assemblages from Tete Jaune Cache, British Columbia, Canada. Can Mineral 13:151-161 Plymate TG, Stout JH (1989) |  | | Journal (article/letter/editorial) | | metamorphosed iron-formation of the Gagnon region, Quebec, Canada. J. Petrology, 10, 56-101. Byrnes, A. P., & Wyllie... J. M., 1973. The tremolite isograd near Marble Lake, Ontario. Can. J. Earth Sci. 10, 936^*7. Irving...7, 246-305. 1974. Greenalite, stilpnomelane, minnesotaite, crocidolite, and carbonates in a very low-grade...of Proterozoic iron-formation, Labrador Trough, Canada. Am. Miner. 63, 898-911 & Fink, R. P., 1976. Petrology...petrology of the Sokoman Iron Formation near Ardua Lake, Quebec. Can. J. Earth Sci. 15, 480-500. Lindsley |  | | Journal (article/letter/editorial) | | sediments of the deep part (668 m) of Issyk-Kyl’ Lake, Kyrgyzstan (Gilart et al., 2001). This model is...(1974). 9. S. Giralt, S. Riera, J. Klerkx, et al., “Lake Issyk-Kul: An Example of Recent Evolution in a Continental...Southern European Working Group of the European Lake Drilling, Girona, Spain, 2001, Terra Nostra, No... 235–285 (1954). 16. C. Klein, “Greenalite, Minnesotaite, Crocidolite and Carbonates in a Very Low-Grade...Petrology of the Sokoman Iron Formation Near Ardua Lake, Quebec,” Can. J. Earth Sci. 15, 480–500 (1978) |  | | Report (volume) | | Sciences University of British Columbia Vancouver, BC, Canada V6T 1W5 N. Giiven Dept of Geology Texas Tech...Royal Ontario Museum 100 Queens Park Toronto, ON, Canada M5S 2C6 R.C. Reynolds, Jr. Dept of Earth Sciences...Royal Ontario Museum 100 Queens Park Toronto, ON, Canada M5S 2C6 Series Editor: P.H. Ribbe Dept Geological...talc Talc in high-pressure rocks Parageneses of minnesotaite 280 280 ACKNOWLEDGMENTS REFERENCES Chapter...Parsettensite Bannisterite Strip structures Minnesotaite Ganophyllite Gonyerite xii 707 710 IDENTIFICATION |  | | Book | | Sciences, Queens University,Kingston, Ontario K7L 3N6, Canada CORNELIS KLEIN, Jr. Department of Geology, University...Sciences, Queens Universitj;Kingston, Ontario K7L 3N6, Canada Present address: GEOTOe Universitt du Que'bec (iMontrtal...C.R 8888, SuccursaleA, MontrkaJ Qutbec H3C 3P8, Canada VI Contributing authors TERRY E. SMITH Deparhnent...University of Wino304 Winhor; Ontario N9B 3P3, Canada JOHN TARNEY Department of Geology, Universig of...Craton (Jolly, 1987a). Volcanic rocks, the Elliot Lake Group at Thessalon (ca. 2450 Ma), occur only in |  | | Book | | Mat 6.10.4 Comparison of Guerrero Negro and Solar Lake Mat Communities 6.10.5 Characteristics of Stromatolites...Geology, University of Montreal, Quebec, H3C 3J7, Canada ELISA D'AMELIO Planetary Biology Branch, National...Geoscience Center, University of Ottawa, KIN 6N5, Canada MALCOLM R. WALTER M. R. Walter Pty. Ltd., P.O....Spain; southern Ontario, arctic, and north-central Canada; and in Michigan, Minnesota, Idaho, Montana, and...previous plus 31 new contributors) 8 (Australia, Canada, Denmark, Germany, South Africa, Sweden, USA, USSR) |
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