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to cite all of their occurrences. such a vast area as California, localities lectors Some minerals...pipe of serpentinized rock bearing a resemblance to the diamond pipes of South Africa has led to some active...a short article on California diamonds. Amador County: A few small stones have been picked up near the...the towns of Volcano, Oleta and Fiddletown. Butte County: In 1853 it was observed that diamonds occurred... Hanks ^^^^ kimberlite of South Africa. gives the gravels at Cherokee Flat, about nine miles north |
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commercial borates. Lawsonite, first found in Marin county in 1895, has proved to be of great petrographic...nickel telluride, melonite, found in Calaveras County in 1867. New minerals and new mineral this is ...of commercial products. The gem-bearing pegmatites of San Diego County have aroused special masses, interest...Oroville of an apparent pipe of serpentinized rock bearing a resem- blance to the diamond pipes of Sonth...differing in its character from the kimberlite of South Africa. Hanks (84) gives an interesting account |
| Velasco, F., Herrero, J. M., Yusta, I., Alonso, J. A., Seebold, I., Leach, D. (2003) Geology and Geochemistry of the Reocin Zinc-Lead Deposit, Basque-Cantabrian Basin, Northern Spain. Economic Geology, 98 (7) 1371-1396 doi:10.2113/gsecongeo.98.7.1371 | Journal (article/letter/editorial) |
pyrite with dolomite as gangue. Microprobe analyses of different generations of dolomite revealed nonstoichiometric...with various amounts of iron (up to 14 mol % of FeCO3). Replacement of host dolomite, openspace filling of...dolomitization along the N60 fault trend. In the Reocín area, two stages of dolomitization are recognized. The...accompanied by ore deposition and, locally, filling of dolomite sands and clastic sediments in karstic cavities...regional limestone, host-rock dolostone and ore-stage dolomite suggest an early hydrothermal alteration of limestone |
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cite all of their occurrences. In such a vast area as may be known to local collectors where excellent... Copper. Scmi-mctals. Antimony. Tellurium. Iron. NON-METALS. 1. DIAMOND. Native carbon, C. ...they were observed in the gold gravels at Cherokee, Butte County, and this locality, became the most noted...pipe of serpentinized rock bearing a resemblance to tlie diamond pipes of South Africa has led to some active...differing in its character from the kimberlite of South Africa. Hanks^^^ gives an interesting account of |
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CARBONATES . Calcite . Magnesite Rhodochrosite Siderite Dolomite Ankerite Huntite Aragonite Strontianite . Witherite...a molar volume of 11-250 + 0-007 cc. CHEMISTRY Iron, zinc, and possibly manganese, may substitute partly...partly for magnesium in the natural mineral. The iron-bearing variety, found in Skye, has been called ferropericlase...Ferropericlase may alter to brucite with separation of iron oxide (Tilley, 1951). OPTICAL AND PHYSICAL PROPERTIES...from wdiite to yellow or brown with the entry of iron. Peridase 3 DISTINGUISHING FEATURES The cubic |
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Claus F. K. Diessel Coal-Bearing Depositional Systems With 356 Figures and 40 Tables Springer-Verlag...environments: Boris Alpern, Ron Boyd, Tom Callcott, Alex Cameron, Alan Cook, Hans Fiichtbauer, Martin Gibling, Fariborz...Collision Margins 9.3.3 Coal-Bearing Intradeeps . . . . . . 9.3.4 Coal-Bearing Transtensional Lateral Basins...facies in any palaeo-environmental analysis of coal-bearing sediments becomes even more desirable. The accuracy...Africa, peninsular India, Madagascar and parts of South America (White 1986). This large southern continent |
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SEYCHELLES SIERRA LEONE SINGAPORE SLOVAKIA SLOVENIA SOUTH AFRICA SPAIN SRI LANKA SUDAN SWAZILAND SWEDEN SWITZERLAND.................................. 72 Polymetallic iron oxide breccia complex deposits ...................Description of a selected deposit: The Canyon deposit (USA) ..................... 241 3.9. 3.10. 3.11. ...262 Sandstone-hosted roll-front deposits in the USA ................................................... Description of a selected deposit: The Denison mine deposit (Canada) ....... 304 Surficial deposits |
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121 141 BOOK REVIEWS ‘‘Minerals of the Frongoch Mine’’ David I. Green ‘‘The Peak District: Landscape...northeast England. The rocks, which crop out in a north south ribbon between Nottingham and the mouth of the River...mineralisation along the southern part of the outcrop (south of the River Tees) were collated by Gillian Harwood...1980s. The first comprehensive review of the northern area is provided by Brian Young and colleagues in this...powellite) have been reported at the Billingham Anhydrite Mine and Whin Houses Borehole. One of the functions of |
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performance in electronic systems, and tantalum-bearing alloys are especially valued for their thermal...240 X Contents Geological Settingof Tantalum-Bearing Mineralization in the Caledonides of SE Ireland...fractures in altered greenstones from San Benito County, California, is reported with 20.57 wt.% RE2 0...approximative decreasing order by thorium, uranium, sodium, iron, strontium, lead 9 Mineralogy of the Rare-Earth...hydrothermal alteration of the Xihuashan tungsten-bearing granites (Jiangxi, China). In the Vallorcine granite |
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onNewMinerals,Nomenclature andClass::ication. Co. County. EMPElectronmicroprobe - an instrument usedto ...Scandium 21 F Fluorine 9 Se Selenium 34 Fe Iron 26 Si Silicon 14 Ga Gallium 31 Sm Samarium...in MB/ is 2268. Considering the limited surface area of Britain and Ireland, this is a remarkable number...provide information on all known species from the area and to acknowledge the contributions of individuals...with older fluorite specimens from Weardale in County Durham being a case in point. Many of these specimens |
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Branch of Distribution, U.S. Geological Survey, 1200 South Eads Street, Arlington, VA 22202 CONTENTS Page...recently found in the Tenmile district, Summit County. In his booklet, which today would be classed as...feldspar, and mica, occur in some form in every county in the State. Among mineralogists, Colorado is...mineral belt that extends southwestward from Boulder County to the southern limits of the San Juan Mountains...in the lava flows of North and South Table Mountains, lefferson County, the contact-metamorphic minerals |
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LIST OF SYMBOLS XV SOURCE ROCKS FOR METAL-BEARING FLUIDS l Konrad B. Krauskopf Crust versus mantle...aqueous phase Generation and emplacement of water-bearing magmas Generalizations regarding hydrothermal fluids...of aqueous phase lv,s Source Rocks for Metal-Bearing Fluids KONRAD B. KRAUSKOPF Stanford University...beginning is assumed to be that found in the troilite of iron meteorites (since the concentration of uranium and...(Fyfe, 1954; 6 i SOURCE ROCKS FOR METAL-BEARING [eG Of UB) iS not Ringwood, 1955; Curtis, 1964) |
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Department of Geology, University of Florida, USA PERGAMON PRESS OXFORD NEW YORK SEOUL TOKYO U...to ore and gangue minerals; (4) the information bearing on the age of the deposit; and (5) the reasons...explain the ideas of those who have worked on it (and mine, where they differ from those readily available...to the next. In Ireland, the geology of the ore-bearing part of that island (which largely excludes for...order; they are of the higher-temperature, silver-bearing variety. In Norway, three of the deposits (Sulitjelma |
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. . . . . . . 2.1 Iron and Steel Refiners . . . . . . . . . . . . . . . 2.1.1 Iron (Fe) . . . . . . ..... . . . . . . 3.6 Kiruna-Type Magnetite Apatite Iron Ore . . . . . . . . . . . . . . . . 3.7 Granite.... . . . . . . . . . . . . . . . . . . . . . 4.7 Iron Oxide Copper Gold Deposits . . . . . . . . . . .... . . . . . . . . . . . . . 4.18 Lahn–Dill-Type Iron Deposits . . . . . . . . . . . . . . . . . . . .... . . . 5.2 Banded Iron Formation . . . . . . . . . . . . . . . . . . . 5.3 Iron Oolite . . . . . . |
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Potsdam, Germany Maarten J. de Wit, Port Elizabeth, South Africa François M. Roure, Rueil-Malmaison, France...require when beginning investigations in a particular area and are encouraged to include as much information...borders of Namibia and South Africa. They were split up in the Mesozoic during the south Atlantic Ocean opening”...Ortelius was the first to recognize the match of the South American and African Atlantic margins (Ortelius...the geological literature to refer to a plant-bearing series in India and afterwards extended to the |