 | | 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 |  | | Journal (issue) | | Menlo Park, CA Donald R. Peacor University of Michigan Ann Arbor, Ml George W. Robinson Natl. Museums...University of So. Florida Tampa, FL Richard W. Thomssen Mineral Expl. Consultants Carson City, NV photography:...R. Kampf Natural History Museum of Los Angeles County Arthur Roe Tucson, AZ Abraham Rosenzweig University...Fifteen, Number Four Articles Famous mineral localities: the Sterling mine, Antwerp, New York ........ 199...and S. C. Chamberlain Pseudomorphs from the Burra mine, South Australia ..............................219 |  | | Journal (article/letter/editorial) | | EconomicGeolog• Vol. 68, 1973, pp. 1063-1074 Mineral Assemblages in Diageneticand LowGrade MetamorphicIron-Formation...FR•.NCn Abstract Mineral assemblagesin diagenetic and low-grade metamorphic iron-formation are characterizedby...chert, iron phyllosilicates(greenalite, chamosite,chlorite, minnesotaire,and stilpnomelane),iron-bearing...ferrodolomite-ankerite, and calcite), iron oxides (hematite and magnetite), iron sulfides (pyrite), and Na-Fe...crocidolite). The upper boundaryof low-grademetamorphismof iron-formationis fixed by the appearanceof grunerite-rich |  | | 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 .................................Columns Guest editorial: What is the future of mineral exhibits in museums? ........................................................ 499 by T. Moore Mineral Stories ...................................... |  | | Report (issue) | | appointment as Engineering Consultant for the Oliver Iron Mining Division of the United States Steel Corporation...prepared by E. C. Harder and A. W. Johnston. New mine exposures have revealed many new features, and new...geology must be interpreted from drill records and mine openings. The structure is extremely complex and...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 |  | | Journal (article/letter/editorial) | | No. I.—JANUARY, 1935. ORIGINAL ARTICLES. Stilpnomelane and Related Minerals as Constituents of Schists...University of Otago, New Zealand. INTRODUCTION. STILPNOMELANE. Optical Properties. Chemical Composition....Optical Properties. Occurrence. GENESIS OP STILPNOMELANE IN METAMOEPHIO ROCKS. INTRODUCTION. TN a recent...metamorphosed quartzo-feldspathic sediments from the Forbes Range, Western Otago, New Zealand, one of the writers...strongly pleochroic mineral, which was identified as a ferruginous member of the stilpnomelane group. Geological |  | | Journal (article/letter/editorial) | | 172 The stilpnomelane group of minerals. By C. OSBORNe.HUTTON, M.Sc., Ph.D., F.G.S. Shirtcliffe Fellow...Zealand, has 'shown that members of the stilpnomelane group, hydrous iron- (or manganese-) rich silicates, are...rocks with the most varied mineral assemblages. In many cases the mineral in question is in sufficient...present. Hence in view of the importance of this mineral in the rocks of this region, it was considered...chemical, and X-ray investigation of stilpnomelane and stilpnomelane-bearing rocks, together with six new |  | | Journal (article/letter/editorial) | | MAGAZINE, JUNE I979, VOL. 4 3 , PP- 2 5 1 - 9 The iron-rich blueschist facies minerals" I. Deerite R. MUIR...cation contents. From differences between the mineral compatibilities of deerites from the higher-grade...stabilities of the low-pressure/low-temperature hydrous iron silicate minerals, it has been possible to map the...stability determinations of Langer et al. (I977). THE mineral deerite is now recognized as being o f considerable...and lawsonite. Deerite is a ferrous-ferric hydrous iron silicate Copyright the Mineralogical Society TABLE |  | | Journal (article/letter/editorial) | | and authors mentioned in the 27th List of new mineral names are not included in this index. Aberchirder... see RAO (V. DIVAKARA), 678 Auburn mine, Minnesota, stilpnomelane, 693 AUCOTT(J. W.), see ENGIN (T.)...meteorites, 736; - and WAINE (C. V.), The Angra dos Reis (iron) meteorite, 94; Metallographic study of hexahedrites...Insizwaite and niggliite, 794 Ca(Fe3+,A1)2SiO~ in iron-ore sinters, anal., X-ray, opt., 872 Cairngorm,...WILSON (J. R,), 8oi Cobar, New South Wales, stilpnomelane, 693 Cocco (G.), FANFANI (L.), NUNZI (A.), and |  | Dusel-Bacon, Cynthia, Brosge, William Peters, Till, Alison B., Doyle, Elizabeth O., Mayfield, Charles F., Reiser, Hillard N., Miller, Thomas P. (1989) Distribution, facies, ages, and proposed tectonic associations of regionally metamorphosed rocks in northern Alaska. Professional Paper 1497a. US Geological Survey doi:10.3133/pp1497a | Report (issue) | | facies map of northern Alaska. 2. Metamorphic-mineral locality map of northern Alaska. Page FIGURE 1...- - - - - - - - - - - - - - - - 2. Metamorphic mineral-assemblage data - - - - - - - - - - - - - - - -...beginning with. the older episode. Metamorphic mineral assemblages for most metamorphic-facies units (table...metamorphic units and are keyed to the metamorphic-mineral locality map (pl. 2). GENERAL SOURCES OF METAMORPHIC... Rb-Sr whole-rock-mica isochron ages and K-Ar mineral ages suggest that the highpressure metamorphic |  | | 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...of 'limonite' pseudomorphs after a mysterious mineral that had occasionally been collected from pegmatites...preexisting mineral--manganoan faylite has been found together with a suite of secondary iron and manganese-rich |  | | Journal (article/letter/editorial) | | Petrology of the Low-Grade Rocks of the Gunflint Iron-Formation, Ontario-Minnesota PAP?k^N I Department...relatively unmetamorphosed middle Precambrian Gunflint Iron-Formation of Ontario has undergone considerable...fundamentally different kinds of iron formation are recognized: (1) cherty iron formation, which consists of...and interstitial cements; and (2) banded or slaty iron formation, which is composed of matrices (fine-grained...n t e r n a l l y structureless laminae). Cherty iron formation corresponds broadly to the thick-bedded |  | | Journal (article/letter/editorial) | | major categories,islandlike (e.g., zussmanite, stilpnomelane) and striplike (e.g., minnesotaite, ganophyllite)...suggestthat parsettensite has a variation of the stilpnomelane structure with smaller islandlike regions and...talc-pyrophyllite, mica, smectite, vermiculite, and talc-like mineral minnesotaite (Guggenheim and Egglechlorite groups...LAYER SILICATES (Lopes-Vieiraand Zussman,1969),stilpnomelane(Eggleton, 1972), ganophyllite (Eggleton and...octahedraldiscontinuities. The serpentineJike mineral chrysotile (Jagodzinski and Kunze, 1954; Whittaker |  | | Journal (issue) | | 16th Field trip 9:00 A.M. to Noon - Andover Iron Mine,. Limecrest Road, Andover. Meeting - 2:30 P.M...Satxtrday and Sunday October 9th and 10th Ninth Annual Mineral Show sponsored by the Franklin Kiwanis Club, Franklin...this status, we pass on a suggestion made by Mr. Forbes M. Dunn, Superintendent of the Farber White Limestone...the last page. ********* 9th Annual Franklin Mineral Show On October 9th and 10th, the Franklin Kiwanis...will sponsor the 9th Annual Franklin Sterling Mineral Exhibit at the Franklin Armory, Routes #23 and |  | | Report (issue) | | GEOLOGICAL SURVEY CIRCULAR 793 The Alaskan Mineral Resource Assessment Program: Background Information...Geological and Geophysical Surveys THE ALASKAN MINERAL RESOURCE ASSESSMENT PROGRAM Large boulders of...(Photo by I. L. Tailleur, 1972~ The Alaskan Mineral Resource Assessment Program: Background Information...Information to Accompany Folio of Geologic and Mineral Resource Maps of the Ambler River Quadrangle, Alaska...dgr.nents -------------------------Summary of mineral exploration and production -----Geologic investigations |  | | Journal (article/letter/editorial) | | the Dow Jones industrial average (as projected by Forbes) and protect the future buying power of our endowment...NORTH-CENTRAL SECTION, 10th ANNUAL MEETING Kalamazoo, Michigan, April 28 - May 1, 1976 10TH A N N U A L 10TH...tenth annual meeting at Western Michigan University, Kalamazoo, Michigan, April 28-May 1, 1976. The meeting...sponsored by the Department of Geology, Western Michigan University. SEND ONE ORIGINAL AND TWO COPIES...Department of Geology Western Michigan University Kalamazoo, Michigan 49008 (616) 383-1775 SPOUSES' |  | | Journal (issue) | | p4,, Over two million residents Arizona's Pinal County welcomes everyone as a V.I.P.!!! ?ieU S ~ , ae...11 S A New Pennsylvania Mineral Delbert L. Oswald 126 Pennsylvania's Mineral Wealth 128 The Kibblehouse...Cornwall-Type Iron Mines Bryon Brookmyer 140 The Native Copper and Piemontite Localities of Adams County Jay Lininger...5 miles west of Mt. Holly Springs in Cumberland County, Pennsylvania. Specimen collected by Martin Anne'...extends to the mineral wealth of the state where both the commercial miner and the amateur mineral collector |  | | Book | | Developments in Precambrian Geology 6 IRON-FORMATION: FACTS AND PROBLEMS DEVELOPMENTS IN PRECAMBRIAN...Plate Tectonics 5. Y.P. MEL’NIK Precambrian Banded Iron-formations. Physicochemical Conditions of Formation...Formation DEVELOPMENTS IN PRECAMBRIAN GEOLOGY 6 IRON-FORMATION FACTS AND PROBLEMS Edited by A.F. TRENDALL...b l i c a t i o n Dai:, Main entry under title: Iron-formation, facts and problems. (Developments in...c) I n c l u d e s bibliograrhies ;rd index. 1. Iron ores. I. Trendall, A. F. (Alec FraEcis) 11. Morris |  | | 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...Distribution Branch, U.S. Bureau of Mines, 4800 Forbes Avenue, Pittsburgh, PA 15213. The report is identified...A wooded area southeast of Colebrook in Lebanon County contains a unique geologic feature. An unusual |  | | Journal (article/letter/editorial) | | the complex has been treated by several authors (Forbes 1857, Brergger 1934, Bugge 1943, Bugge 1965). Recently...became available through systematic search by local mineral collectors, especially Vegard Evja, Trond Spilhaug...less schistose amphibolite and hornblende schists (Forbes 1857, Bugge 1965). Lenses of massive, nickel-rich...remarkable and most common hydrothermal Ni-Co mineral at the Valberg quarry. Remarkable in the sense...small crystals of quartz, albite and pyrite. The mineral occurs in bunches of tiny needles up to 2,5-3 cm |  | | Journal (article/letter/editorial) | | minerals. In his first two lists Spencer arranged his mineral names alphabetically along with the first observer...any, mineralogists used or checked out Spencer's mineral entries. Also Spencer never attempted the necessary...references a reassessment of the status of each mineral (species or non-species) was attempted. This was...of the references in the literature: of the 287 mineral names listed in Spencer's two lists, 209 were culled...expanded and modified form. These non-species mineral names are printed in ordinary type. In many cases |  | | Journal (article/letter/editorial) | | subordinate interbedding of cherts and minor carbonates. Mineral k m b l a g e s in metabasic rocks are characterized...pyroxene~hlorite-phen~te-tit~te f albite f stilpnomelane. In the quartz bearing assemblages garnet is...the Nanga Parbat Syntaxis in the Swat area. The mineral assemblages described by Shams (1972, 1980), Dedio...& Kumar (19n) and Jan (1985) describe the Same mineral assemblages from tectonic blocks within an ophiolitic...characterized by crossite-albite-epidotechlorite-stilpnomelane-quartz as well as glaucophanelawsonite-garn |  | | Book | | Aberllyn Mine. near Betws-y-Coed (Bevins er al .. 1982). and lanthanite-(Ce). from the Britannia Mine. at..... 1985). Prior to these reports. eight other mineral. had been first discovered in Wales. All of the...addition. first British Isles reports for 67 other mineral species were from \Vales: these are listed in Table...2. In this book. details are presented for all mineral species currently known to occur in Wales. Table...second part of the book provides a listing of all mineral species currently known to occur in Wales, along |  | | Journal (article/letter/editorial) | | Geology. Siuriford Llriiwrsity, Stmiford, CA 94305, USA Abstract. The Western Baja terrane (WBt) of west-central...Lw NaA NaC pg PmP Qtz Rbk Rt StP Ttn Wm epidote iron oxide glaucophane garnet hematite j adeitic clinopyroxene...paragonite pumpellyite quartz riebeckite rutile stilpnomelane titanite white mica INTRODUCTION High-pressure...Otsuki. Itaya & Nakajima, 1978; Vearncombe, 1983; Forbes, Evans & Thurston, 1984; Goffe & Velde, 1984; Selverstone...Subductiori complex, Baja California of Aka California (USA). The aims of this paper are to introduce the structural |  | | Journal (article/letter/editorial) | | Minnesota'sMesabi range where the Middle PrecambrianBiwabik Iron Formationlies unconformably on Early Precambrian...by the MiddlePrecambrian VirginiaFormation. The iron-formationhas beenintrudedand thermallymetamorphosed...Quartzandmagnetite are the mostabundant mineralsin the iron-formation, but ironrich silicatesthat formed during...amphiboles. TI-iF. Dunka River Introduction iron-formation to thepyroxenehornfelsfacies.Other area...Erie Mining Company, and portionsof the Biwabik Iron Formation with sufficientmagnetiteare mined and |
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