 | | Report (issue) | | Geology and Ore Deposits of the Cuyuna North Range Minnesota GEOLOGICAL SURVEY PROFESSIONAL PAPER...407 Geology and Ore Deposits of the Cuyuna North Range Minnesota By ROBERT GORDON SCHMIDT GEOLOGICAL...1924Geology and ore deposits of the Cuyuna North range, Minnesota. Washington, U.S. Govt. Print. Off....87-91. l.Geology Minnesota Cuyuna North range. 2.Ore-deposits Minnesota Cuyuna North Range. S.Iron ores Minnesota...Minnesota Cuyuna North range. I.Title: The Cuyuna North range, Minnesota. (Series) For sale by the Superintendent |  | | Journal (article/letter/editorial) | | average twelve states (North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Iowa, Missouri, Wisconsin...locality occurrences in only four Midwestern states: North Dakota, Nebraska, Oklahoma, and Kentucky; these...luck while collecting, or limited access to a wide range of mineral dealers might have been more at play...or IMA approval Species Type locality Initial North American references (not necessarily the very first... Marion County, Tennessee Shepard 1835 1835 Nitromagnesite Nicajack Cave, Marion County, Tennessee |  | | Journal (article/letter/editorial) | | 1965 IRON PHYLLOSILICATES OF THE CUYUNA DISTRICT IN MINNESOTA R. L. Bre.rB, Minneapolis Metallwrgy...of the Trommald iron-formation in the Cuyuna district, Minnesota, showed the following minerals in order...decreasing abundance: Mn-Mg-siderite, stilpnomelane, minnesotaite, magnetite, quartz, two unidentified iron silicates...and arsenopyrite. Much coarse nematoblastic minnesotaite is oriented along secondary rock cleavage traces...layering. Three samples of stilpnomelane and one of minnesotaite were concentrated from fracture-fillings in |  | | Report (issue) | | GEOLOGY OF THE CUYUNA DISTRICT, MINNESOTA: A PROGRESS REPORT UNIVERSITY OF MINNESOTA MINNESOTA GEOLOGICAL...DIRECTOR BULLETIN 36 The Geology of the Cuyuna District, Minnesota A PROGRESS REPORT BY FRANK F. GROUT...WOLFF, SR. MINNEAPOLIS· 1955 THE UNIVERSITY OF MINNESOTA PRESS PRINTED AT LUND PRESS, INC., MINNEAPOLIS...mines of the Cuyuna district in considerable detail. About 1940 a brief synopsis of Cuyuna geology was...the University of Minnesota. In 1941 Mr. Grout started active field work on the Cuyuna largely in connection |  | | Journal (article/letter/editorial) | | iron-formation was found in the Midternaes area north east of Ivigtut, South-West Greenland. It contains...probably be correlated with Kenoran age rocks on the north coast of Labrador (ALLaART et aL 1969). The younger...of the supracrustals is rather flat towards east-north-east. After deposition they suffered three phases...for some hundred meters, pinching out towards the north and disappearing under the ice towards the south...m long and 0.5 m wide, but mostly smaller, and range from greyish to light greenish in colour. Jasper |  | | Journal (article/letter/editorial) | | variety of volcanic and sedimentary rock types and range in thickness up to a b o u t 300 m (Table I). SVOP-IF...(Markland, 1966). SVOP-IF displays the greatest range in silica content among classified iron-formation...Canada Sweden Sweden USSR Canada Canada Canada USA 1 2 3 4 5 6 7 8 9 iO ii 12 >60 24 ...9 Helen, iO Outerring; Precambrian !~7:ii Pickle Crow; {$iddle-Late Precambrian W: 12 Soudan B2 AI ...6 .... 19 USA 230 Cg,fLs Mn,Gn,St Cht,Cal 46 4 0.90 18.7 19.7 0.63 2.98 20 USA 153 sMu,tMu |  | | Journal (article/letter/editorial) | | States are in the Lake Superior region, in Minnesota, Wisconsin, and Michigan. Thinner units occur...iron-formation stratigraphy,however, differ greatly from one range to another; it is likely that each area of iron-formation...contemporaneous sediments. The iron-formations range in thicknessfrom about 100 feet to more than 2,000...content of unoxidized rock typically is in the range of 25 to 35 percent. Beds of iron-formation as much...oœthe separaterangesin Montana, State Surveysof Minnesota,Wisconsin,and Michi"Geologyof the Wyoming, and |  | | Report (issue) | | Chlorite (excluding chamosite) _______________ Minnesotaite. ______________________________ Stilpnomelane_...analyses of glauconite.________ 6. Analyses of minnesotaite, stilpnomelane, 8 thuringite, and bavalite_...Occurrences of iron-rich beds of Precambrian age 23. North and South America,. 34 24. Europe and Asia__--___--_36...depositional or diagenetic origin, have a wide range of physical and chemical properties, in part because...hematite, and magnetite; siderite, with a substantial range in amounts of manganese, magnesium, and calcium |  | | Journal (article/letter/editorial) | | Greenland), they are part of Archean cratons and range in age from about 3.5 until 2.5 Ga. Their overall...deformation of extensive BIFs of the Hamersley Range of Western Australia and the Transvaal Supergroup...stilpnomelane, and riebeckite, and locally pyrite. Minnesotaite is a common, very low-grade metamorphic reaction...(ranging from 43 to 56 wt%). CaO and MgO contents range from 1.75 to 9.0 and from 1.20 to 6.7 wt%, respectively...in the evaluation of rock types that reflect a range in Fe content (from ferruginous to Fe-rich) all |  | | Journal (article/letter/editorial) | | western Vermont, but also from Scotland, Minnesota-Michigan iron range, and northwest Washington. That stilpnomelane...produced by the first of these reactions has a limited range of variation in Fe/Mg. As grade advances within...V e r m o n t a n d N e w H a m p s h i r e , Minnesota a n d Michigan, a n d t h e N o r t h Cascades...u r t h e r u p o n s a m p l i n g a b r o a d range of r o c k t y p e s a t each g r a d e of m e t...locality. Specimens from the iron formations of Minnesota and Michigan were collected by Dr. Rolland Blake |  | | Journal (article/letter/editorial) | | paleoenvironmental more recently been named Algoma type in North typesand three intermediatesare differentiatedin...irregular ironstone. Oolitic texture is common in North green patchescontaining20 percent Fe. Its basal...Precambrian MECS Uda SCOS Roper River SCOS Constance Range SVOP Per Geijer-Kiruna SVOP Kiirunavaara-Kiruna...DWAT Savant Lake INT2 Lake St. Joseph SVOP Pickle Crow INT3 Seminoe INT3 Nova Lima SVOP Soudan MECS Cascade-Mozaan...46, 63*, 135 160', 186 14, 90, 189' MECS Bong Range Middle PrecambrianW 55*, 77, 171 • Acronymsfor |  | | Journal (article/letter/editorial) | | squartz, magnetite,greenalite,stilpnomelane,minnesotaite,siderite,and ankerite. Fe shalescontain chamosite...to attempt to posed lithologies, display a wide range in take into accountthe modificationcausedby metametamorphicgrade...tablesandfigures.1, WestWeld Range;2, CentralWeld Range;g, EastWeld Range;4, Hill 50 Gold Mine; 5, Koolanooka;...Clackline;12, Mt. Bakewell;15, Johnston Range;14, Trough Well; 15, North Range,Kooyanobbing; 16, CorinthianGold...which20 to 40 vol.percentismaghole$, centralWeld Range(Fig. $), illustratesfea- netiteoccurringin 1-to |  | | Book | | G.B. MOREY Minnesota Geological Survey, 1 6 3 3 Eustis Street, St. Paul, Minnesota 55108, U.S.A. .... . . . . . . . . . . . . . Iron-formations of north-central Wisconsin . . . . . . . . . . . . . . ....the term and gave it an unchallenged position in North American literature; he included in the term “all...volcanic, or metasedimentary rocks”. The local Minnesota name “taconite”, earlier used as a synonym of...which would have been called “iron-formation” in North America (e.g., Wagner, 1928). While Beukes (1973) |  | | Report (issue) | | BIBLIOGRAPHY OF MINNESOTA 1951-1980 GEOLOGY ves ai é Lita: ae i if “Pe va MINNESOTA GEOLOGICAL...DIRECTOR BULLETIN BIBLIOGRAPHY SURVEY 46 OF MINNESOTA GEOLOGY 1951-1980 COMPILED G.B. MOREY, NANCY...NANCY BY BALABAN, AND LYNN Gn UNIVERSITY OF MINNESOTA ST. PAUL e 1981 SWANSON ISSN 0076-9169 @...@ ISBN 0-934938-01-6 The University of Minnesota is committed to the policy that all persons shall have...bibliography brings Minnesota Geological Survey Bulletin 34, ‘‘Bibliography of Minnesota Geology,’’ by T |  | | Report (volume) | | '"fhe Marquette Range Super~oup in the . G0gebic Iron District, Michigan and Wisconsin GEOLOGICAL SURVEY...Department of Natural ResourceS! The Marquette Range Supergroup in the Gogebic Iron District, Michigan...Data Schmidt, Robert Gordon, 1924The Marquette Range Supergroup in the Gogebic iron district, Michigan...---------------------------Strata of Marquette Range Supergroup-----------Chocolay Group------------...degrees Fahrenheit ~ ~ l:%j ~ 00 THE MARQUETTE RANGE SUPERGROUP IN THE GOGEBIC IRON DISTRICT, MICHIGAN |  | | Book | | NESOTA OF IRON RANGE RESOURCES AND REHABILITATION OF THE STATE OF MINAND THE MINNESOTA GEOLOGICAL SURVEY—The...the Taconites and Iron Ores of the Mesabi Range, Minnesota Hematite-Limonite Deposits SWEDISH GEOLOGICAL...of the Iron River-Crystal Falls District, Iron County, Michigan PERMISSIONS The following papers have...in Carbonates from the Biwabik Iron Formation, Minnesota Series Editor’s Preface The philosophy behind...Taconites and Iron Ores of the Mesabi Range, Minnesota, Chap. 9, Iron Range Resources and Rehabilitation Commission |  | | Journal (article/letter/editorial) | | gondites point to metamorphic conditions in the range of 450-500~ at 2 - 3 kbar. KEYWORDS" gondite, manganese...In Ghana, six parallel greenstone belts trending north to northeast are recognized. The Nangodi belt in...postdates cryptomelane. The compositions of white micas range from ordinary muscovite (MgO and FeO < 2 wt.%, MnO...samples (< 1.1 wt.%), and TiO2 contents are in the range of 0 . 3 - 0 . 4 wt.%. Andradite contents (Fe3+...2 - 1 6 wt.% FeO, 12-15 wt.% MgO). CaO contents range between 0.6 and 7.6 wt.% with clusters at 0.7, 2 |  | | Journal (article/letter/editorial) | | about 0.5 mm in diameter composed of greenalite, minnesotaite, or stilpnomelane in a matrix of chert or another...marked and has been noted all over the world: in North America "In general clastic quartz is scarce throughout...weighted distribution; an average of 136 analyses of North American banded iron formations is represented by...for a full account. Environment of Deposition The North American formations were clearly recognized as sedimentary...and ferrous. The total iron is generally in the range of 0.01-0.025 mg/1 (Cooper, 1935). The greater part |  | | Journal (article/letter/editorial) | | Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh NC 27695-8208...voluminous literature to appreciate either the range of iron-formation characteristics or the conflicting...ilmenite martite marcasite magnetite maghemite minnesotaite nontronite iron-rich phosphates other than vivianite...Agbaja+Batati !?ace MEoee Pale LL cret LL cret Tunisi USA USA USA Nigeti 34”16N 32”59N 4O”lf~N 40”23N T”50N 80463...EM SiIu EM Siiu EM Silo EM Silo E Silo USA USA USA USA USA 76 77 78 79 80 scos INT3 SCOS scos SVOP |  | | Journal (volume) | | of the Pic de Fon Iron Oxide Deposit, Simandou Range, Republic of Guinea, West Africa I. L. Cope, J....Brief History of High-Grade Iron Ore Mining in North America (1848-2008) Philip E. Brown 361 Part IV...four sheets at a 1:100,000 scale in the Espinhaço Range and has worked widely in Brazil and shield South...Mineração Santa Blandina, and Amarillo Gold, on a broad range of commodities, including gold, diamonds, iron,...is professor of economic geology and teaches a range of undergraduate and graduate classes, many with |  | | Report (issue) | | by a study by Ishihara et al. showing that the range in oxidation states of Archean granitoid intrusions...who have contributed to this volume hold a wide range of views about the composition of the early Earth...contributions of the volume. Our sincere hope is that the range of views propounded in this volume will help students...precipitated from fresh water, has been discovered off the north coast of Iceland (Marteinsson et al., 2001; Geptner...cell: The nature and origin of life: Burlington, North Carolina, Neil Patterson Publishers, 275 p. de Zwart |
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