 | | 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) | | of Geochemistry ' * Chapter W. Chemistry of the Iron-rich Sedimentary Rocks GEOLOGICAL SURVEY PROFESSIONAL...FLEISCHER, Technical Editor Chapter W. Chemistry of the Iron-rich Sedimentary Rocks By HAROLD L. JAMES GEOLOGICAL...PAPER 440-W Chemical composition and occurrence of iron-bearing minerals of sedimentary rocks, and composition...distribution, and geochemistry of ironstones and iron-formations UNITED STATES GOVERNMENT PRINTING OFFICE..._________ ___________________ Iron minerals of sedimentary rocks __ ______ Iron oxides __ _______________________ |  | | Journal (article/letter/editorial) | | maturation of hydrothermal plume-derived silica-iron gels Received: 28 June 2002 / Accepted: 10 January...National Center, MS 954, Reston, Virginia, 20192, USA small relics of fine-grained hematite-rich domains...this stage. Jasper beds and sulphide/oxide/silicate iron-formations (‘vasskis’; Sand 1986) are commonly associated...deposit. Near the massive ore body at the Høydal mine, the lower jasper unit is penetrated by sulphide...be in contact with sulphide/oxide/silicate 629 iron-formation (vasskis). Vasskis units can be traced |  | | Journal (article/letter/editorial) | | 200] at 02:44 30 December 2014 MINERALS FROM THE IRON DEPOSITS OF NEW YORK STATE T he principal goal...present the important minerals from the New York State iron deposits. Not all the minerals identified in these...detailed descriptions. To write an article about the iron deposits of New York State and their minerals is...information about the history, geology, and origin of the iron deposits and occurrences. Where a mineral or a group... This is the case for the Tilley Foster mine (Putnam County), which was well described by Nightingale |  | | Journal (article/letter/editorial) | | Mg-rich minnesotaite and stilpnomelane from the Osj6berg and Sirsj6berg iron-ore mines, Hjulsj6, W. Bergslagen...Sweden GREENALITE,Mg-rich minnesotaite, and stilpnomelane have been identified by electron microprobe...occurrence of these minerals in the Proterozoic iron ores of Central Sweden. The two mines, some 700...magnetite ore horizon--one of the many concordant skarn iron ores in the 1.8-1.9 G a Proterozoic Bergslagen Supracrustal...(Oen et al., 1982). They were amongst the largest iron producers of this area. The subsurface geology of |  | | 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 |  | | Journal (issue) | | SPRING/SUMMER 1993 M ARTICLES Spangolite from the Sterling mine, Ogdensburg, New Jersey R. E. Jenkins II 6 The...— Field Trip — Collecting at the Old Andover Iron Mine, Andover, New Jersey. 1:30 - 3:30 — Lecture —...years have witnessed the reopening of the Sterling mine, a major addition to the Franklin Mineral Museum...include a very fine pyrite crystal from the Buckwheat mine, and a drill core from the north end of the Franklin...the time you read this, the rising water in the mine will have claimed all of the mine's underground |  | | Journal (article/letter/editorial) | | PrecambrianBanded Iron-Formations HANS P. EUGSTER AND I-M•N6 CI•OU Abstract We proposethat Precambrian iron-formations...remainingmagadiiteinteractedwith iron mineralsto produce riebeckite, a mineral common to iron-formations. Other reasonswhy...responsiblefor someof the diagenetic featuresobservedin iron-formationsby Trendall and Blockley (1970), Gross(1972)...Gross(1972), and Dimroth and Chauvel (1972, 1973). Iron solubiliw and transport have been calculated using...require considerablesupersaturation. Precipitation of iron mineralsoccursin responseto changesin pH and fcot |  | | Journal (article/letter/editorial) | | mineralization is primarily hosted within the stilpnomelane alteration zone of the Stawell Facies that is...during the D4c deformation event produced the stilpnomelane zone of the Stawell Facies, the proximal and...the central lode showing the distribution of stilpnomelane, chlorite, muscovite alteration of Stawell Facies;...1998), using the stilpnomelane thermobarometer of Miyano and Klein (1989). The stilpnomelane thermobarometry...mineralogic and petrologic data from Precambrian iron formations and blueschist facies metaironstone. |  | | Report (issue) | | also plotted lOa. Distribution of mica and stilpnomelane in the <2-ym fraction of till from the Clear...derived clay-size minerals like serpentine, talc, stilpnomelane, and kaolinite gives specific evidence for local... ilmenite, leucoxene, sphene, iron and titanium oxides, stilpnomelane felsic volcanic fragments with...chlorite, epidote minor: sphene, graphite, stilpnomelane, biotite accessories: carbonate, opaques, rutile...fragments, stilpnomelane antigorite, minor chrysotile, talc, chlorite, tremolites, opaques, stilpnomelane Mineralogy |  | | Journal (issue) | | mussen . . . . .. . . . .... . . . . ... . .. . . Baker Shle Geologist . .... . . .. . .. ... . . .......1. p ho ne (S03) 229-5 580. Baker Field Oflice: 2013 First Street , Baker 978 14, p hone (503) 523-3...may be purchased from the Department's Ponland, Baker, or Grants Pass offices . They may be ordered by...Mount Bolivar near the Coos. Curry. and Douglas County boundaries. The area is about 31 km(19mi) long...location for mineralization. The Mule Mountain gold mine located on lOp of the ridge about 800 m (0.5 mil |  | | Journal (article/letter/editorial) | | Who's Who in Mineral Names Minerals Named ) ] for Michigan L / Mineralogists and Geologists In this, the...veys, we pay tribute to those individuals from Michigan who have been honored by hav ing minerals named...Geology and Mineralogy University of Michigan Ann Arbor, Michigan 48109 T H E Y E A R 1987 I S NOT O N...S Q U I C E N T E N N I A L of the state of Michigan but also of Michigan's geological and mineralogical...mineralogical studies and surveys. Asso ciated with Michigan geological institutions have been many famous |  | | 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) | | 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) | | of Geological Sciences, University of Michigan, AnnArbor,Michigan 48109 Abstract Vergenoeg is a fluorite-bearing...abundant fluorite,Vergenoeg is similarto massive iron oxidedeposits suchasKiruna,PeaRidge,andCerroMercado...lacksinclusions thatmightrepresent an immiscible iron-richmeltbut contains abundant aqueous inclusions...siderite, hematite, magnetite, ferropyrosmalite, stilpnomelane, biotite,sphene, quartz,andapatite, whicharemostcommon...belongin thisclass Thefirstinvolves an immiscible iron oxide magma, with or without later hydroandhowtheyarerelatedto |  | Grew, Edward S., Yates, Martin G., Belakovskiy, Dimitriy I., Rouse, Roland C., Su, Shu-Chun, Marquez, Nicholas (1994) Hyalotekite from reedmergnerite-bearing peralkaline pegmatite, Dara-i-Pioz, Tajikistan and from Mn skarn, Långban, Värmland, Sweden: a new look at an old mineral. Mineralogical Magazine, 58 (391) 285-297 doi:10.1180/minmag.1994.058.391.11 | Journal (article/letter/editorial) | | Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, U.S.A. SHu-CHuN SU Hercules...Aegirine Rhodonite Peetolite Talc-like mineral Stilpnomelane-likerain. Apophyllite X X X X X X T X T X...tentatively identified as stilpnomelane. It has moderate birefringence. The brown stilpnomelane-like mineral in...across o f randomly oriented flakes. The brown stilpnomelane-like mineral is commonly found with Kfeldspar...four-circle diffractometer at the University of Michigan: a = 11.284(2), b = 10.930(1), c = 10.272(8) A |  | | Journal (article/letter/editorial) | | 581; spectrochemical determination of, 790; Amelia County, anal., 796 ALIAS (L. J.), see DE CASTRO(A. HoYos)...(Lawrence H.), The Abundance of the Elements, 349 BAKER (George), Detrital heavy minerals in natural accumulates...DANCE (D. F.), see DARNLEY (A. G.), 48 Daphnite, Michigan, anal., D.T.A., 404 DARNLEY (A. G.), ENGLISH (T...see Akaganeite, 270 Ferristilpnomelane, see Stilpnomelane, 1032 Ferrodiorite, Skye, anal., petr., 26 Ferro-eckermannite...endmember, defined, 1097 Ferrostilpnomelane, see Stilpnomelane, I032 Ferrosundiusite, amphibole end-member |  | | Journal (article/letter/editorial) | | 552 305 Ayres, V. L. Mineral notesfrom the Michigan iron country. . . . .203, 432 /od 2Il Bagrowski...consin.. J.)O Albite-twinning lamellae, width of , Baker, G. Cordierite granite from (Donnay). . . . 578...index liquids. 299 Bowley, H Boxhole meteoritic iron, Australia. (Madigan, man) 829 JTJ central Alder154...Chkalovite. (Gerasimovsky) 311 Chuquicamata copper mine. (Head) 377 Cinnabar, spectrographic study of...TeriP granite from Cordierite Terip, Victoria. (Baker)... . . . Correns, C. W. and Eskola, P. with Barth |  | | Journal (article/letter/editorial) | | Baddeleyite, Austria, from metacarbonates, 523 BAKER,J. H., element mobility in granite, 107; greenalite...greenalite, Mg-rich minnesotaite and stilpnomelane, 611 BALDERF~,W., high-level radioactive waste, 281 BALDWIN...diagenis greenschist facies transition, 365; Botallack mine, botallackite, 87; Carnmenellis granite, fracture...sillimanite, 132 INDEX GREENLAND,S W, metamorphism of iron-formation, 117; Gardar Province, Tugtut6q older...177 Iron, Fe z+ and Fe 3+ in rocks and minerals, 101; absorption spectra in rose quartz, 709 Iron compounds |  | | Journal (article/letter/editorial) | | and geochemistry of silicate, sulfide, and oxide iron formations in Norway: evidence for fluctuating redox...Abstract Laterally extensive silicate and sulfide iron formation associated with jasper (hematitic chert)...by diagenetic processes. Protoliths of silicate iron formation precipitated in anoxic and intermittently...greenalite, stilpnomelane, magnetite, manganosiderite, apatite, and iron sulfides. In sulfide iron formation...intermittently anoxic or euxinic conditions. Keywords Iron formation . Geochemistry . Anoxic seawater . REE |  | | Journal (article/letter/editorial) | | DOI : 10.3749/canmin.45.6.1415 THE SCADDING GOLD MINE, EAST OF THE SUDBURY IGNEOUS COMPLEX, ONTARIO: AN... Ontario M5S 3B1, Canada Abstract The Scadding mine is only one of several small gold deposits and prospects...precipitation. We propose that Scadding is a modified iron oxide – copper – gold (IOCG) deposit in which Fe...enrichment, Sudbury area, Ontario. Sommaire La mine Scadding est un site minéralisé parmi plusieurs...Scadding mine, is one of a group of small gold deposits in the Wanapitei Lake area. The mine is located |  | | Journal (article/letter/editorial) | | Mn-gruneritemagnetite-Mn-minnesotaite zone in a stilpnomelane or greenalite-rich groundmass. The minnesotaite...to have formed at the expense of grunerite. Stilpnomelane, the most abundant silicate phase in the rim...composite mixture of amorphous FeOOH and silica. The iron-hydroxide recrystallized partially to poorly-crystalline...has been found together with a suite of secondary iron and manganese-rich phyllosilicates and amphibole...98An0_1Orl~), quartz, iron-rich biotite, and fayalite. In tiny rugs cleavelandite, stilpnomelane, and stilbite |  | | Journal (article/letter/editorial) | | Lundström and Papunen 1986; Gaal and Gorbatschev 1987; Baker et al. 1988; Allen et al. 1996). The ore-bearing...province features thousands of mines, mainly worked for iron oxides and base metal sulphides during its more...great variety of ore deposit types, including banded iron formations, magnetite– calc-silicate skarns, carbonate-hosted...1970; Ohlsson 1979; Lundström and Papunen 1986; Baker et al. 1988; Sundblad 1991; Åberg and Fallick 1993;...of the ore zone in the presently studied Alfrida mine is mainly NW–SE, and although the mineralization |  | | Journal (article/letter/editorial) | | September/October: Silver crystals, Bachelor mine, Amethyst vein system, Mineral County, Colorado; Dave Bunk specimen...Colorado, 413; Nevada, 515 Annabergite, Kilometer 3 Mine, Laurium District, Greece, R. B. Cook, 154–59 Apatite... B. Cook, 426–31 Calcite, 462; Colorado, 410; Michigan, 312; Nevada, 516; New York, 162, 253; Quebec...Uvite with Overgrown Dravite, Bigelow, St. Lawrence County, New York, 250–59; Gemstone Deposits in Turkey...517 Connoisseur’s Choice, Annabergite, Kilometer 3 Mine, Laurium District, Greece, R. B. Cook, 154–59; Calaverite |  | | Journal (article/letter/editorial) | | silicates such as clinopyroxene, biotite and stilpnomelane are described to provide full information about...granitic magma. Since the comprehensive survey by Baker (1963), the Seychelles Islands have been known as...believed to be a marginal facies of the grey granite (Baker, 1963). Gneissose grey granite Pink Rb-Sr isochron...brown and Z = bluish yellow to brownish green. Stilpnomelane also occurs as subsolidus minerals. The pink...encloses ferroedenite (Fig. 2D). Subsolidus stilpnomelane flakes commonly occur fringing the primary ferromagnesian |
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