 | | Report (issue) | | and Ore Deposits of the Iron River-Crystal Falls District, Iron County Michigan GEOLOGICAL SURVEY PROFESSIONAL...of the Michigan Department of Conservation PAPER 570 Geology and Ore Deposits of the Iron River-Crystal...River-Crystal Falls District, Iron County Michigan By H. L. JAMES, C. E. BUTTON, F. J. PETTIJOHN, and K. L...cooperation with the Geological Survey Division of the Michigan Department of Conservation UNITED STATES GOVERNMENT..._______ Greenstone in the Hemlock FormationBird Iron-Bearing Member.._________ Thickness and relations |  | | Report (issue) | | GEOLOGY OF THE NORTHERN CRYSTAL FALLS AREA IRON COUNTY, MICHIGAN By F. J. Pettijohn Prepared with the cooperation...cooperation of the Geological Survey Division Michigan Department of Conservation UNITED STATES DEPARTMENT...GEOLOGY OF THE NORTHERN CRYSTAL FALLS AREA IRON COUNTY, MICHIGAN By F. J. Pettijohn REPRINTED 1958 Washington...Greenstones.............. Footwall strata ............ Iron-formation ............ Hanging-wall strata. ....................... Stratigraphy ................ Iron-formation ............ Breccia-graywacke bed .. |  | | Journal (article/letter/editorial) | | order to obtain 4Mg0, 3COr,22H2O. NOTES ON STILPNOMELANE FteNr...bladed mineral were collected from the Animikian iron formations. There is a good exposure in veins in...occurrence of stilpnomelane, (black) and quartz (white), in veins crossing stilpnomelane schist and taconite...gamma:1.615 +6, alpha:1.546+4. The indices, however, suggest a biotite with little iron, while the birefringence...mixture of biotite and a little quartzl and the iron was too high for a biotite of the indices of refraction |  | | Journal (article/letter/editorial) | | over-emphasized. The spodumene "Iogs" at the Etta mine are not products of replacement. (4) The common...through the Society of Economic Geologists. STILPNOMELANE, NONTRONITE, AND HALLOYSITE FROM NORTIIERN MICEIGAN...AYRES Stilpnomelane, nontronite, and halloysite have not heretofore been reported from the Michigan iron...iron mining districts. The first of these, stilpnomelane, occurs as a conlact mineral where granite pegmatite...analysis is an abnormally high content of ferric iron together with appreciable manganese. The arc spectrographproves |  | | Journal (article/letter/editorial) | | analyses. To check our work, tests were made on stilpnomelane from Baern, Bohemia, found in our museum collection...g&r1rr&: 1.677 + 4;alpha : 1.58+ 1. In both potash and water, therefore, some stilpnomelane resemblesbiotite...distinguish from biotite. In many respects, then, stilpnomelane seems to be intermediate between chlorites and...being exhibited: Mr. Biernbaum, Avondale, Delaware County; Mr. Hoadley, New England and Canadian localities;...localities; Mr. Oldach, Worrall's farm, Delaware County, and the French Creek mines; Mr. Clay, Stockton, N. |  | | Report (issue) | | AND SOUTHEASTERN PARTS OF THE IRON RIVER DISTRICT IRON COUNTY, MICHIGAN By Harold L. James and Kenneth...cooperation of the Geological Survey Division, Michigan Department of Conservation WASHINGTON, D. C....AND SOUTHEASTERN PARTS OF THE IRON RIVER DISTRICT. ffiON ·COUNTY, MICHIGAN By Harold L. James and Kenneth...• • • • • • Footwall strata..................... Iron-f'orma tion. • • • • • • • • • • • • • • • • • •...w••••••• Section 24, T. 43 N., R. 35 w....... Spies mine area ( EisEt) •••••• ·• • • .Swt· sec. 24.. • • |  | | Journal (article/letter/editorial) | | rBn-Determination of the Mineral Composition of Mine Dust by Means of X-rays. J. W. Gnnrc, H. E. MBnwrN...in Magnetite. C. B. Sr,awsox-High Iron Tourmaline from Marquette Iron Range. T. L. WexER AND A. L. PansoNs-How...(Mesabi Range) and Iron Serpentine. -Some Notes on the Structure of Stilpnomelane. 884 JOURNAL MINERALOGICAL...AccessoryMinerals of the Wolf Mountain Granite, Llano County, Texas. BBNNBTTFnaNr Burn-A Peculiar Form of Differentiated...Greek gamma erroneously stands in place of Greek alpha. The Cleveland Mineralogical Society founded on |  | | Journal (issue) | | Menlo Park, CA Donald R. Peacor University of Michigan Ann Arbor, Ml George W. Robinson Natl. Museums...R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University...Articles Famous mineral localities: the Sterling mine, Antwerp, New York ........ 199 G. W. Robinson...and S. C. Chamberlain Pseudomorphs from the Burra mine, South Australia ..............................219...on white natrolite from the Dallas Gem mine, San Benito County, California. For more on this locality |  | | Journal (article/letter/editorial) | | societiesmergedin 1950. He was the chairman of the USA National Committee for Crystallography and had been...and I. Fankuchen, X-ray investigation of the stilpnomelane group of minerals.Min. Mag.25, 172. 1939 I....Bull. 33, 123 p., 1932. The geology of Brunswick County, Virginia (abs.): Virginia Acad.. Sci, , Proc....Petrography of the marbles. In "Marble prospects in Giles County, Virginia" by A. A. L. Mathews: Va. Geol. Surzt...1915-16,88-89, 1946. The geology of Chesterfield County, Virginia (abs): Virginio Acad. Sei. Proc.Jor 1918-49 |  | | Journal (issue) | | Morehead Riverside, CA Donald R. Peacor University of Michigan Ann Arbor, Ml George W. Robinson Natl. Museums...Velthuizen Franklinphilite, the manganese analog of stilpnomelane, from Franklin, New Jersey ...................& J. N. Alves Minerals of the Black Pine mine, Granite County, Montana .................................and attended by mining industry representatives, mine owners, representatives from all o f Vermont’s mineralogical...year: the Houston Museum supplement in # 1, the Michigan Copper Country Issue (# 2 ) and the Yukon Phosphates |  | | Journal (article/letter/editorial) | | States with historic production from the Blackbird Mine. All of the deposits were deformed and metamorphosed...to those in iron oxide copper-gold deposits, the fluids were more reduced such that iron was fixed in...in biotite and tourmaline instead of iron oxides. Introduction THE IDAHO cobalt belt is a 60-km-long...quartzite breccia Magnetite ± Co ± Cu deposits IC Iron Creek (Jackass) Normal fault Thrust fault Study...opaque sulfides from the Merle zone, Blackbird Co-Cu mine, Idaho. Some, but not all, of the quartz crystals |  | | Report (issue) | | Balmat mine, N. Y. Chromite-chromium ore, Washington Zinc ore, Friedensville, Pa. Banded iron-formation...Concentrating-grade Iron Resources in the Negaunee Iron-formation, Marquette District, Michigan By W. F. CANNON...and economic potential of subeconomic resources of iron in an important active mining district 3 UNITED...concentrating-grade iron resources in the Negaunee Iron-formation, Marquette District, Michigan. (Geological...Bibliography: p. Supt. of Docs, no.: I 19.16:1045 1. Iron ores—Michigan—Marquette Co.—Data processing. I. Powers |  | | Journal (article/letter/editorial) | | MARCH 1951 IRON FORMATION AND ASSOCIATED ROCKS IN THE IRON RIVER DISTRICT, MICHIGAN By HAROLD L. JAMES...JAMES ABSTRACT The iron formation of the Iron River district is part of a Precambrian sequence of strata...strata characterized by a high iron content and varied mineralogy. The iron formation, where unoxidized...20 per cent iron in the form of very finely disseminated pyrite. Graywacke overlies the iron formation...consists of clastic grains in a matrix of siderite or iron-rich chlorite. Above the graywacke is a magnetic |  | | Journal (article/letter/editorial) | | and higher refractive indices than the pigeonite, alpha being about 1.701, beta 1.707and gamma, L726. The...a trip to the South Mountain district in Adams County, accompanied by Messrs. Cajori and Gordon. Piedmontite...Westfield, Mass. Am. Mineral., 4, 4-5 (1919). Stilpnomelane and chalcodite at the trap quarries of Westfield |  | | Journal (article/letter/editorial) | | GEOCHEMICAL DISTINCTIONS AMONG ENVIRONMENTAL TYPES OF IRON FORMATIONS MICHAEL M. KIMBERLEY Department of...environmental types of iron formations. Chem. Geol., 25:185--212 Classification of iron formations according...major iron-formation types are largely independent of deposit age. No evidence is found in iron formations...abundant inland seas. Shallow-volcanic-platform iron formations typically display large positive europium...phosphorus and alkali content, even within individual iron formations. Various minor-el6ment abundances may |  | | Journal (article/letter/editorial) | | theoretical formula BizTer. No pyrite was observed; the iron may have been derived from a silicate. Under the...and higher refractive indices than the pigeonite, alpha being about 1.701, beta 1.707and gamma, L726. The...a trip to the South Mountain district in Adams County, accompanied by Messrs. Cajori and Gordon. Piedmontite...Westfield, Mass. Am. Mineral., 4, 4-5 (1919). Stilpnomelane and chalcodite at the trap quarries of Westfield |  | | Report (issue) | | (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 |  | | Report (issue) | | OF MINERALS AND MINERAL LOCALITIES ALLANITE Inyo County: 1, Coarse grained allanite occurs in a pegmatite...quadrangle, McAllister (4) p. 52. Los Angeles County: Additional reference, Patchick (2) p. 237. This...diagrams. 1, AMPHIBOLES ACTINOLITE San Bernardino County: 3, Additional Wrightwood, reported by Berkholz...locality in alluvium, near 21. HORNBLENDE Inyo County: 1, In large prismatic crystals up to 2.5 inches...Panamint Range, McAllister (4) p. 52. San Bernardino County: 2, Pargasite variety of hornblende occurs in coarsely |  | | Report (issue) | | Minerals of Franklin and Sterling Hill, Sussex County, New Jersey" in U. S. Geological Survey Professional...Jbeen valuable for their content of manganese and iron. High-grade spelter or commercial zinc, zinc oxide...paint and in the arts, and spiegeleisen (an alloy of iron and manganese) used in the manufacture of steel...original land survey made in 1749 mentions "the old mine holes" in the area. Many years later the nature...valuable ore of iron. Endeavors to smelt this highly refractory ore in the Franklin iron furnace as well |  | | Journal (article/letter/editorial) | | petrologyof very-low-metamorphicgradeArchaeanbanded iron-formations,Weld Range,Western Australia MaRUN J...minnesotaite, siderite, quarlz,magnetite, greenalite, stilpnomelane, pyrite, and chamosite with trace amounts of...2-30cm-thick bands within banded iron-formation, containing chamosite, stilpnomelane, siderite, greenalite, pyrite...reported from very-low-metamorphic grade Proterozoic iron-formations. In common with pubtshed greenalite analyses...pyrrhotite. These assemblagesare overprinted by stilpnomelane, which formed by reaction of a K-bearing fluid |  | | Journal (article/letter/editorial) | | including the assessment of the stability of the iron silicate ilvaite. 2. Geological setting and age...Table 1. Texturally, quartz is always isolated by an iron-rich biotite rim from the main, quartz-absent, assemblage...100x. into a mixture of white micas, chlorite, and iron oxides (pinite) whereas feldspars experience sericitization...ferroactinolite, ilvaite, quartz, calcite, stilpnomelane, chlorite, magnetite, scheelite, and sulfides...Ilvaite was formed before ferroactinolite, stilpnomelane, and chlorite. Locally, andradite-rich garnet |  | | Journal (article/letter/editorial) | | extensionof the actinolite-hbrnblende miscibility gap to iron-rich bulk compositions JoHN M. Ar-I-nN e,No RavuoNn...actinolite-hornblendemiscibility gap extends to extremely iron-rich compositions l M g / ( M g * F e 2 + )o f 0...actinolite-hornblende miscibility gap to extremely iron-rich compositions. Geological setting of samples...fine-grained crystals, which together with chlorite, stilpnomelane,and ilmenite have replacedigneouspyroxenes....effects by the method of Benceand Albee (1968),using alpha faetors from Albee and Ray (1970). Chemical analysesare |  | | Journal (article/letter/editorial) | | Pardeet J' T' Massive low-fluorine topaz ftom Brewer mine' S' Carolina' " ' 1058 Glauconite' Missouri' sfudy...(Allen)' " " 1180 Goethite and hematite in brown iron ores of east Texas' micros c o p i c s t u d y o...Gruner, J. W. Composition and strucfure of stilpnomelane . 209, 912 --Densities and structural relationships...Mont. (Hewett). 803 Hematite and goethite in brown iron ores of East Texas. (Galbraitl).... . ........ 1007...(Frondel' Ashby) 104 Incrustation, selective, of mine r a l s . ( t r ' r o n d e l ) . . . . . . . . |  | | Journal (article/letter/editorial) | | Geological Sciences The University of Michigan Ann Arbor, Michigan 48109 Abstract Galaxite (Gx:MnAlzO+)...Departmentof GeologicalSciences,the University of Michigan. 0003-004x/83/0304-0449$02.00 449 (Vincent...deepred to red-black apparentlyas a function of iron content. When deep red it is easily confusedwith...ahorite-galaxite-(acobsite) - alabandite - stilpnomelane - caryopilite kellyite-fluorapatite BK22: a...l l Al representedby the Al form factor and the iron and traces temperolure foctor B t| =0 . 0 0 7 r |  | | Book | | 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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