 | | 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...formations. _______________________________ Baraga Group._____________________________ Hemlock Formation___________________ |  | | 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 Ā·COUNTY, MICHIGAN By Harold L. James and Kenneth...ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ Footwall strata..................... Iron-f'orma tion. ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ ā¢...wā¢ā¢ā¢ā¢ā¢ā¢ā¢ Section 24, T. 43 N., R. 35 w....... Spies mine area ( EisEt) ā¢ā¢ā¢ā¢ā¢ā¢ Ā·ā¢ ā¢ ā¢ .SwtĀ· sec. 24.. ā¢ ā¢ |  | | Book | | Mineralogy of Michigan by E. W. Heinrich updated and revised ā¢ by George W. Robinson M By E W~ Hellnr]ch...Museum Michigan Technological University Houghton, Michigan 49931 2004 Ā© 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 |  | | 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 |  | | Journal (article/letter/editorial) | | MAY, 1954 SEDIMENTARY FACIES HAROLD OF No. 3 IRON-FORMATION L. JAMES CONTENTS PAGE Abstract .................................... 239 The term "iron-formation" . .................................................... 239 240 The Precipitation of iron ................................................................................. 244 facies of iron-formation ................................................................................. Stilpnomelane............................................ |  | Ledevin, , Arndt, , Chauvel, , Jaillard, , Simionovici, (2019) The Sedimentary Origin of Black and White Banded Cherts of the Buck Reef, Barberton, South Africa. Geosciences, 9 (10) 424 doi:10.3390/geosciences9100424 | Journal (article/letter/editorial) | | Sedimentary Origin of Black and White Banded Cherts of the Buck Reef, Barberton, South Africa Morgane Ledevin, Nicholas...October 2019 Abstract: The Buck Reef is a 250ā400 m thick sequence of banded black...Archean; Buck Reef; sediment; geochemistry; climate 1. Introduction Banded cherts and iron formations...silica alternate with darker bands of carbonaceous, iron-rich, carbon-rich siliceous or detrital sediments...This study addresses these questions using thethe Buck sequence black white cherts addresses these questions |  | Bekker, A., Slack, J. F., Planavsky, N., Krapez, B., Hofmann, A., Konhauser, K. O., Rouxel, O. J. (2010) Iron Formation: The Sedimentary Product of a Complex Interplay among Mantle, Tectonic, Oceanic, and Biospheric Processes. Economic Geology, 105 (3) 467-508 doi:10.2113/gsecongeo.105.3.467 | Journal (article/letter/editorial) | | Geologists, Inc. Economic Geology, v. 105, pp. 467ā508 Iron Formation: The Sedimentary Product of a Complex...Place N. Copernic, 29280 PlouzanĆ©, France Abstract Iron formations are economically important sedimentary...geochemical evolution of Earth. Two types of Precambrian iron formations have been recognized with respect to...to their depositional setting. Algoma-type iron formations are interlayered with or stratigraphically linked...(VMS) deposits. In contrast, larger Superior-type iron formations are developed in passive-margin sedimentary |  | | Journal (article/letter/editorial) | | several stratigraphic levels of the Onverwacht Group of the Barberton greenstone belt, from the top of...Formation to the base of the ~3.26 Ga Fig Tree Group have been investigated petrologically and geochemically...Onverwacht, Fig Tree and Moodies Groups. The Onverwacht Group formed between ~3.55 and ~3.30 Ga and consists of...of the Inyoka fault (Figure 1), the Onverwacht Group has been subdivided into six formations (Figure...Theespruit Formations (Cloete, 1999). The Fig Tree Group, ~3.26 to ~3.23 Ga in age (Krƶner et al., 1991; |  | | Journal (article/letter/editorial) | | 1. Suuulnv or l-Leyrn Por,yrvpns Symbol Space Group Unique Angle Equivalent Structure2 rb-2 Ia-l...derived eight theoretical 1-layer structures of space group C2/m, as well as eight theoretical2-Iayerstructuresof...specimen,the assignmentof an exact 3-dimensional space group does not appear warranted. The space grorp C2/m'...distribution (Fig.5a), confirming C1 as the actual space group. We have also obtained an acentric distribution...the idealizedpolytype. Thus, the observed space group lor IIb-2 is C2 rather than C2/m and for IIb-4 is |  | | 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) | | (top left). Calcite, 5.5 cm high, Elmwood mine, Smith County. Terry Huizing specimen, Jeff Scovil photo...(above). Fluorite, 13.1 cm wide, Elmwood mine, Smith County. Francis Benjamin specimen, Jeff Scovil photo...(left). Fluorite, 2.5 cm on edge, Elmwood mine, Carthage, Smith County. Terry Huizing specimen and photo. Figure...Figure 4 (right). Cumberland mine, Smith County. Travis Paris photo (2004). Figure 5 (far right page)...Tennessee brown iron deposits, the MascotāJefferson City zinc district, the Bumpass Cove iron-zinc-manganese |  | | Report (issue) | | indicated the desirability of a new study of the Mesabi iron-formation; such a study would use modern concepts...of the stratigraphy and structure of the greatest iron ore producing district in the world, and it is hoped...will prove helpful in continued development of the iron-ore deposits. The Minnesota Geological Survey is...companies: The Cleveland-Cliffs Iron Co., the Eveleth Fee Office, Great Northern Iron Ore Properties, The M. A...Hanna Co., Inter-State Iron Co., Meriden Iron Co., W. S. Moore Co., the Oliver Iron l\lining Division of |  | Lantink, Margriet L., Davies, Joshua H. F. L., Mason, Paul R. D., Schaltegger, Urs, Hilgen, Frederik J. (2019) Climate control on banded iron formations linked to orbital eccentricity. Nature Geoscience, 12 (5) 369-374 doi:10.1038/s41561-019-0332-8 | Journal (article/letter/editorial) | | 1038/s41561-019-0332-8 Climate control on banded iron formations linked to orbital eccentricity Margriet...in deep time is largely unknown. Banded iron formations, iron-rich marine sediments older than 1.8 billion...exposures of the 2.48-billion-year-old Kuruman Banded Iron Formation reveal a well-defined hierarchical cycle...variations in banded iron formations. B anded iron formations (BIFs) are iron-rich (~30 wt%) and distinctively...continental shelves7,8, diagenetic and microbial iron cycling9ā11 and the rise of oxygen in the oceans |  | | Journal (article/letter/editorial) | | in anoxic geological terrains such as the banded iron formations on early Earth and extraterrestrial objects...āgeobiotropyā. Keywords: Anoxic iron oxidation; abiogenic ferric iron; high subcritical water; alkaline...origin of life; inclusions; geobiotropy; banded iron formations; Enceladus 1. Introduction Liquid water...subcritical, permit the oxidation of ferrous iron into ferric iron in alkaline anoxic conditions and the synformation...compounds in geological terrains, such as banded iron formations (BIFs), and of components of life inside |  | McAteer, Claire A., Stephen Daly, J., Flowerdew, Michael J., Connelly, James N., Housh, Todd B., Whitehouse, Martin J. (2010) Detrital zircon, detrital titanite and igneous clast UāPb geochronology and basementācover relationships of the Colonsay Group, SW Scotland: Laurentian provenance and correlation with the Neoproterozoic Dalradian Supergroup. Precambrian Research, 181 (1) 21-42 doi:10.1016/j.precamres.2010.05.013 | Journal (article/letter/editorial) | | and basementācover relationships of the Colonsay Group, SW Scotland: Laurentian provenance and correlation...Geological Sciences, University of Texas at Austin, USA d Natural History Museum of Denmark, Ćster Voldgade...Accepted 11 May 2010 Keywords: Provenance Colonsay Group UāPb geochronology Zircon Detrital titanite Neoproterozoic...enigmatic low-grade metasediments of the Colonsay Group, SW Scotland to determine their source and assess...Caledonides. SmāNd model ages (tDM ) of the Colonsay Group range from 1664 to 2140 Ma, suggesting a Palaeoproterozoic |  | Farber, K., Dziggel, A., Meyer, F.M., Harris, C. (2016) Petrology, geochemistry and fluid inclusion analysis of altered komatiites of the Mendon Formation in the BARB4 drill core, Barberton greenstone belt, South Africa. South African Journal of Geology, 119 (4) 639-654 doi:10.2113/gssajg.119.4.639 | Journal (article/letter/editorial) | | Africa, forms the uppermost unit of the Onverwacht Group. It is dominated by ultramaļ¬c volcanic rocks interbedded...amphibole, stilpnomelane and ankerite. The overlying sediments are made up of banded iron formations...surface and largely occur in the Upper Onverwacht Group. Siliciļ¬cation mainly occurs at the top of ultramaļ¬c...ferruginous cherts of the Mapepe Formation (Fig Tree Group; 0 to 433 m) and altered komatiitic and black cherts...cherts of the Mendon Formation (Onverwacht Group; 433 to 538 m). While the Mapepe Formation in drill core |  | | Journal (issue) | | Carolina). Chalcedony after interstices from Chester County, Pa., has been described by Vaux, G., 1935] ...the serpentine pseudomorphs from the Tilly Foster Mine, Putnam Co., N. Y., appear to have formed through...Anglesite after Cerussite: III, B 2 b Broken Hill Mine, New South Wales, 16364-6-7-9, 16371-2 'Traube,...Silesia, 8678 Cervantite after Antimony: I, C 2 Kern County, California, 17240, 18383 (stibioconite ?) Cervantite...4151-2-3-5-6, 4179; Guanajuato, Mexico,2 3746; East Pool Mine, Camborne, Cornwall, 3636; Schneeberg, Saxony, 35612-3; |  | Gregory, Melissa J., Schaefer, Bruce F., Keays, Reid R., Wilde, Andy R. (2008) Rheniumāosmium systematics of the Mount Isa copper orebody and the Eastern Creek Volcanics, Queensland, Australia: implications for ore genesis. Mineralium Deposita, 43 (5) 553-573 doi:10.1007/s00126-008-0182-6 | Journal (article/letter/editorial) | | Gregory (*) Colorado School of Mines, Golden, CO, USA e-mail: melissajgregory@gmail.com Present address:...1590 - 1500 Ma 1652Ā±7 Ma 1655Ā±4 Ma MOUNT ISA GROUP 7760000N Urquhart Shale 1674Ā±6 Ma1 Warrina Park...EASTERN CREEK VOLCANICS 1678Ā±5 Ma3 HASLINGDEN GROUP Pb-Zn Mineralisation ca. 1653 Ma Pickwick Member...Metabasalt Member 556 E W Lower Mount Isa Group 3000mRL Spear Siltstone Urquhart Shale 65 0O...Paroo Fault 00 OB 2000mRL 19 The Mount Isa Group overlies the Eastern Creek Volcanics at Mount Isa |  | | Book (edition) | | in to In his extraordinary collection of "one group of 13 smoky crystals, moveable bubbles and 9 basal...some of the more valuable metallic ores of gold, iron and ā copper, and the a.ssociated ores of zinc...5. Copper. 11. Graphite. 16. Galenite. 6. Iron. Molybdenite. 17- Altaite. GEOLOGY OF NOETH...Pyrophylite. 25. Chalcopyrite. 61. Wad. 101. Stilpnomelane. 98. 99. Talc. 26. Barnhardtite. 62. Senarmontite...Burdiek, Macon Prof. J. T. I From am of county, of Mr. J. A. D. Stevenson, of States- Humphreys |  | | Journal (article/letter/editorial) | | Chub Lake-Type Hematite Deposits in St. Lawrence County, NY Steven C. Chamberlain 1, *, Marian V. Lupulescu...Albany, NY 12230, USA New York State Museum, Research and Collections, Albany, NY 12230, USA; marian.lupulescu@nysed...Department, Hamilton College, Clinton, NY 13323, USA; dbailey@hamilton.edu Correspondence: sccham2@yahoo...Province in St. Lawrence County, New York. Here, we focus on six of them: the Dodge mine, the Chub Lake prospect...that secondary goethite formed from weathering of iron-rich carbonates at some sites. It is likely that |  | | Journal (issue) | | on limestone along r~:t~JQ.\{t;_t:l'!'P_erland County, 5 miles southwest of Carlisle. Photo courtesy~'of...mica and zinc, 9th in common clay, 1Oth in kaolin, iron ore, and industrial sand and gravel, 13th in copper... Greene County, with 12 major underground mines planned, may become the "numero uno" county for coal...A wooded area southeast of Colebrook in Lebanon County contains a unique geologic feature. An unusual...- Located in the woods north of Lawn in Lebanon County is this unusual example of the weatheri ng of diabase |  | Wilde, A. R., Jones, P. A., Gessner, K., Ailleres, L., Gregory, M. J., Duncan, R. J. (2006) A Geochemical Process Model for the Mount Isa Copper Orebodies. Economic Geology, 101 (8) 1547-1567 doi:10.2113/gsecongeo.101.8.1547 | Journal (article/letter/editorial) | | lead-zinc orebodies at the northern end of the Mount Isa mine, and giant copper-poor lead-zinc orebodies occur...Urquhart Shale, when other units of the Mount Isa Group have similar mineralogical and bulk chemical characteristics...recently discovered at the north end of the copper mine. The second part of this paper presents reaction...rather than other (similar) units of the Mount Isa Group, and whether fluid mixing or wall-rock reaction...Early rifting produced rocks of the Haslingden Group. These include coarse sandstones of the Mount Guide |  | | Report (volume) | | In preparation: XVII. The Flora of the Dakota Group, a posthumous work, by Leo Lesquereux. Edited by...Whittteld. The Penokee Iron-Bearing Series of Northern "Wisconsin and Michigan, by Roland D. Irving and...Colorado, by S. F. Emmons. Flora of the Dakota Group, by J. S. Newberry. The Glacial Lake Agassiz, by...meridian of 76Ā° 30', from Tompkins County, New York, to Bradford County, Pennsylvania, by Henry S. "Williams...14. The Electrical and Magnetic Properties of the Iron-Carburets, by Carl Barus and Vincent Strouhal. 1885 |  | | Book (edition) | | extraordinary collection of quartzes, he has ā one group of 13 smoky crystals, having 52 moveable bubbles...ores and ciated ores of zinc, lead ā of gold, iron and copper, silver. Gold occurs almost universally...association with pyrite and ehalcopyrite, &c., as wfill Iron state, in nite, ( is be seen b}r a glance at... Copper. 42. Corundum. 87. Oligoclase. 6. Iron. 43. Hematite. 8S. Albite. 7. Lead. 44. Menaccanite... 60. Psilomelane. 103. Serpentine. 101. Stilpnomelane. 22. Pyrrhotite. 61. Wad. 104, Detveylite |  | | Book (volume) | | instance, a single Spodumene crystal from the Etta Mine near Keystone on the east side of the Mount Rushmore...production of minerals, principally Gold, Silver, Copper, Iron, Lead, Manganese and Zinc, along with lesser amounts...beds, excavations, etc.ļ¾Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...ļ¾gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...gravels, etc.ļ¾petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: ļ area ridges, slopes, stream beds |
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