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| '"fhe Marquette Range Super~oup in the . G0gebic Iron District, Michigan and Wisconsin GEOLOGICAL SURVEY...Dt'visz'on, Michigan Department of Natural ResourceS! The Marquette Range Supergroup in the Gogebic Iron...Iron District, Michigan and Wisconsin By ROBERT GORDON SCHMIDT GEOLOGICAL SURVEY BULLETIN 1460 Prepared...cooperation with the Geological Survey Division, Michigan Department of Natural Resources Geologic description...Precambrian X strata, particularly the Ironwood Iron-formation, and of the relationship between ore location |
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| OF THE TYLER AND THE COPPS FORMATIONS OF THE GOGEBIC IRON DISTRICT BY GORDON I . ATW ATER CONTENTS Introduction......................................... Tyler formation....................................................................................... Copps formation........................................................................................... Iron formation................................................................ Age of the granites of the Gogebic district...................................... |
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| ASPECTS OF THE ORIGIN FORMATION OF MICHIGAN N. KING OF THE IRONWOOD AND WISCONSIN • IRON- HUBER CONTENTS.................... Stratigraphy of the Ironwood iron-formation .......................... General description...of the iron-formation members .................... Lateral continuity of the iron-formation members...members .................. Alteration of the iron-formation ..................................... Primary...Primary mineralogy and compositionof the Ironwood iron-formation ........ Location of material studied |
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| _____________________________________________ Michigan and Wisconsin.________:_____-____--_--__----_...______________________________________________________ Michigan and Wisconsin,_____-_-________-_-__-_-_------..._--____________________________ Wisconsin and Michigan. _______-_:________-_______-_----_ __---_____...__-_____________________ i _ Origin of the iron-formation.__.____---_-___-_-_-------------------_-_-...---------------_---_-_---___--_-_-__-__________ Iron bacteria and algae__________-____--__--__---_-- |
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| W (Lower Precambrian) Rocks in Western Gogebic County, Michigan GEOLOGICAL SURVEY BULLETIN Work done...W Lower Precambrian) Rocks in 'estern Gogebic County, Michigan Jy ROBERT GORDON SCHMIDT GEOLOGICAL ...cooperation with the \ Geological Survey Division., Michigan \Department of Natural Resources Geologic description...W (lower Precambrian) rocks in western Gogebic County, Michigan. (Geological Survey bulletin ; 1407) Bibliography:...Stratigraphic Pre-Cambrian. 2. Geology Michigan Gogebic Co. I. Michigan. Geological Survey Division. II. Title |
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| 7J-33I Geology of Precambrian rocks, Ironwood-Ramsay area, Michigan By Robert G. Schmidt '" NOV3 1372...Precambrian rocks, Ironwood-Ramsay area, Michigan Robert G. Schmidt Field mapping of the Iron-rood-Ramsay area...area in western Gogebic County, Michigan, was done in the years 1965-1970, and studies of the area are...cooperation with the Geological Survey Division of the Michigan Department of Natural Resources. y The geology...succession. Much high-grade iron ore has been produced from the Ironwood Iron- Formation in this succession, |
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| DEVELOPMENT OF LAKE SUPERIOR SOFT IRON ORES FROM METAMORPHOSED IRON FORMATION BY STANLEY A. TYLER CONTENTS...1102 Introduction 1102 Metamorphic fades of the iron formations.... 1102 General statement 1102 Minerals...Grunerite 1103 Stilpnomelane 1103 Minnesotaite 1103 Magnetite 1103 Chert (quartz) 1104 Factors that influence...chert through the formation of iron 1104 silicates General statement 1104 Effective iron content 1104 Primary...Primary textures 1104 Secondary iron silicates 1105 Sills and dikes 1105 Quartz-adularia pegmatite veins |
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| _______________ 46 Abandonment of the Indian Trail Formation and distribution of certain equivalent ash-flow...____ 55 The Magoffin Member of the Breathitt Formation, by W. F. Outerbridge ____ 64 Revision of Cretaceous..._____ 67 Reinstatement of the name Cape Fear Formation in North and South Carolina, by Norman F. Sohl...68 The Emperor Volcanic Complex of east Gogebic Range, Michigan, by Virgil A. Trent __________________...in the eastern part of the Nevada Test Site, Nye County, Nev ___________ __ 51 3. Map showing known distribution |
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| (CaBSiO4OH) vesicle filling from a basaltic Houghton County lava flow. Small specks of native copper occur...the surface and between the nodular masses. The Michigan Bicentennial symbol (back cover) incorporates...Survey Division BULLETIN 6 THE MINERALOGY OF MICHIGAN by E. Wm. Heinrich Professor of Mineralogy and...University of Michigan Ann Arhor, Michigan Lansing, Michigan 1976 STATE OF MICHIGAN WILLIAM G. Mrr...State of Michigan CL '48 s.321.6. Printed by Speaker-Hines and Thomas, Inc., Lansing, Michigan. Available |
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| come by. Its name comes from the Greek word for iron (sidero). I was unable to confirm the source of...rare, unusually gemmy green siderite. The Mamarues iron mines in Romania have also produced specimens desired...In the United States, the Eagle Mine in Gilman County, CO, is probably the source of the best specimens...forms a series with rhodochrosite, meaning that iron (Fe) and manganese (Mn) can substitute for each...Similarly, zinc and magnesium may substitute for iron, with siderite also forming series with smithsonite |
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| Mineralogy of Michigan by E. W. Heinrich updated and revised • by George W. Robinson M By E W~ Hellnr]ch...Museum Michigan Technological University Houghton, Michigan 49931 2004 © MINERALOGY OF MICHIGAN 3 FOREWORD...FOREWORD Michigan has a long and varied geologic history that includes repeated episodes of volcanism...before the first Europeans set foot here. When Michigan became a state in 1837, one of the first actions...and we continue to learn more about them today. Michigan minerals helped to build the state and nation |
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| Economic Vol. 68, 1973, pp. 934-959 Precambrian Iron-Formations of the United States * R. W. B^YLE¾^m)...The thickest and most extensive Precambrian iron-formations of the United States are in the Lake...Superior region, in Minnesota, Wisconsin, and Michigan. Thinner units occur within the Precambrian cores... and Arizona. The major iron-formations in the Menominee, Marquette, Gogebic, Mesabi, and Gunflint districts...associationsand detailed iron-formation stratigraphy,however, differ greatly from one range to another; it is |
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| 299-320 GEOLOGY OF THE TEMISCAMIE IRON-FORMATION, LAKE ALBANEL IRON RANGE, MISTASSINI TERRITORY, QUEBEC...Boulder Bay formation ............................................. 303 Temiscamie iron-formation 303 ....................................... Magnetitic iron-silicatemember ...................................................... 308 3!2 314 315 Kallio formation ....................................................... 319 319 ABSTRACT The Lake Albanel iron range is located 400 miles north of Montreal, l•uebec |
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| a wide variety of geological events, from the formation of vast submarine lava flows to violent surface...centered on Lake Superior (black lines are the major iron ranges). Also shown is the volcanic basin to the... are exposed along the south side of the Gogebic iron range in northern Wisconsin. These rocks are typical...Wisconsin includes the important Ironwood iron-formation of the Gogebic iron range. These rocks accumulated on...Vermilion district in northern Minnesota, of the major iron districts in the Lake Superior region were formed |
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| 94 r Ri 35–36 olf W 51 67 2 8 8 8 53 MICHIGAN ver 68 Lake Chippewa 41 2 60–66 11 9–10...Janesville 12 3–4 Racine 1–2 12 90 94 14 Michigan 94 ke 44 53 nsin 34 41 Wi s co 61 r...��������������������������������������� 149 43. Black River Falls Iron Mine ������������������������������������������������������������...�������������� 176 52. Bradley Iron Mine Hematite and Iron Formation������������������������������ 179...������������������������������ 188 56. Florence Iron Mine ����������������������������������������� |
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| THE MAGNETITE IN IRON-FORMATIONS LAKE SUPERIOR GENE L. L^BERGE REGION ABSTRACT Magnetite is one...one of the dominant iron-bearing minerals in iron-formations of the Lake Superior region. The problem...whether the magnetite is primary or secondaryis basic in connectionwith the origin of iron-formation. The ...relations, and distribution of magnetite in the Mesabi, Gunflint, Gogebic, Iron RiverCrystal Falls, Marquette...micronspheresof chert. Magnetitein iron-formationstypicallyhas a wide range in grain size (from approximately |
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| equivalent Middle pre-Cambrian(Huronian) rocks Iron-formation shown in solid black Staurolite or equivalent...MENOMINEE GENERALIZED GEOLOGIC MAP OF NORTHERN MICHIGAN, SHOWING METAMORPHIC ZONES BULLETIN OF THE GEOLOGICAL...REGIONAL METAMORPHISM IN THE PRECAMBRIAN OF NORTHERN MICHIGAN BY HAROLD L. JAMES ABSTRACT Precambrian rocks...an area of about 7500 square miles in northern Michigan. Of this area, approximately 3300 square miles...the Huronian sedimentary rocks, especially in the iron formations and the graywackes and slates, and in |
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| Geologic Map of the Wakefield Quadrangle Gogebic County, Michigan by William C. Prlnz and Harold A. Hubbard...cooperation with the Geological Survey Division Michigan Department of Natural Resources U. S. Geo'r~...labradorlte and pyroxene with or without olivine. Magnetite is an abundant accessory. Unmetamorphosed and...dikes cut Slemans Creek Formation and most older units. Ysb Slemans Creek Formation and Bessemer Quartzite...Keweenawan age (Precambrian Y). Slemans Creek Formation Is predominantly a massive, uniform-appearing |
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| subtidal-shelf deposition of Superior-type banded iron-formation . Richard W. Ojakangas Lower Proterozoic volcanic...plutonism Sedimentation 6 volcanism (Marquette Range Supergroup & Animikie Group) 2000 Metamorphism...by Blackwelder in 1914 and named for the Penokee Range in northern Wisconsin. Blackwelder originally assigned...Great Lakes region but also for providing in¬ formation on the nature of early Proterozoic tectonics,...arranged geographically, from the upper peninsula of Michigan and adjacent Wisconsin, to north central Wisconsin |
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| Bdtain, Connecticut 3 Ia chlorite, Vicar mine, Michigan. 4. Io cookeite, Londonderry, Western Australia...monoclinic ID types are especially Al-poor. The range of tetrahedral AI in the specimensstudied is from...spacingsof cation ordering, of different pressuresof formation, and of the presenceof Fe3+ or other cations not...to the energy available in the environment of formation. The stable chlorite in normal chlorite grade...(orthohexagonal16) contained in certain European oolitic iron ores tend to recrystallize to a monoclinic chlorite |
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| Racine (Scovil 1994), the pegmatites of Florence County (Koehier 1989) and the Wausau area (Falster 1987)...and datolite) found in the Upper Peninsula of Michigan also occur in Wisconsin. The major difference...zircon), particularly in the Wausau area of Marathon County (Falster 1987). Middle Proterozoic quartzites (1...and iron formations. A major iron range, the Gogebic Range, extends into Wisconsin from Michigan. The...out. Most are gneisses and amphibolites; some are iron formations, such as that worked near Black River |
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| carbon isotope geochemistry of the Kfivoy Rog iron formation, Ukranian SSR E. C. PERRY, Jr. & S. N. AHMAD...cexbon isotope geochemistry of the Krivoy Rog iron formation. Ukranian SSR. Lithos 14, 83-92. Oslo. 7~SSN(4)24-4937...Krivoy Rog iron formation, Ukranian SSR, are reported here. Maximum and minimum quartz~magnetite fract~onation...fract~onation values (&w) and inferred temperature range in degrees centigrade for ea~.:h mine are: Mine A~...from three open pit mines in Krivoy Rog ~ron formation, Ukranian SSR. Much of the geologic literature |
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| Co / Munich, Germany Laguna Beach, California, USA tel: +1 949 494 5155 / info@kristalle.com The ... MAY–JUNE 2020 Articles The Montreal mine, Iron County, Wisconsin ....................................$324/three years, (Canada) $196/one year, (outside USA other than Canada) $275 for one year Subscription...photographer and book collector, was born in Cook County, Illinois on July 31, 1932, the son of Sophie Klainowski... He worked first as Assistant Director of Cook County Public Aid, 398 On the evening of October 15, |
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| formations on the Cuyuna to those in the Mesabi and Gogebic districts. Both Mr. Grout and Mr. Wolff have spent...appointment as Engineering Consultant for the Oliver Iron Mining Division of the United States Steel Corporation...expected that new data and interv VI THE CUYUNA RANGE pretations will accumulate. Such work is now being...We are grateful for contributions by the Oliver Iron Mining Company; Pickands Mather & Co., P. S. Gray... John S. Owens, Geologist; The Cleveland-Cliffs Iron Co., E. L. Derby, Geologist; Butler Brothers, Earl |
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| 1025-1060 ORIGIN OF HENRY PRECAMBRIAN LEPP AND IRON SAMUEL FORMATIONS S. GOLDICH CONTENTS PAGE ...1027 Problem of the iron formations ..................................... 1027 Iron ...................................................... Chemistryof iron formations ............................................................................. Tenor of iron ..................................................Precambrian ............................................ Iron formations outside of North America ........... |
