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| mineral pyrite, while Mn is resident in siderite and magnesian siderite. S, Ni and Co also occur, to a lesser...et al., 1986a)as follows: Step I dissolution of siderite in 1 M HCI at 60°C Step 2 dissolutionof sulphides...calculated between the geochemical groupings, carbonate-siderite, sulphide, sillcate and organic, respectively...comparative measure of the amounts of quartz, kaolinite, siderite, pyrite and buddingtonite. Diffraction peaks at...trace minerals and also to analyse pyrite and siderite for selected trace elements. 3. R e s u l t s |
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| commercial iron ore. and the rock outcrops expose many inThe first mining of iron ore in the teresting...1848; the Minerals are beautiful in themselves, ore was hauled by team to a forge near but when their...may be only a stone to some, but it to smelt iron ore near the mines ; even is an open book to you. Every...simply happen; the to the efforts of the early iron-ore deveunderlying causes of their formation ace lopers...oldest rocks known. Many of these Lake Superior region and the furnaces were originally gravels, sands |
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| similarities in their geologic characteristics (ore and gangue mineralogy, major- and trace-element geochemistry...lithology, wall-rock alteration, physical aspects of ore, etc.), as well as their geologic setting (see for...to have potential for economic exploitation. An "ore deposit" is a mineral deposit that has been tested...Jambor and Blowes (1994), and Plumlee (in press). Ore and gangue mineralogy, host rock lithology, and wall-rock...sulfide minerals. Some non-sulfide minerals such as siderite and alunite can also generate acid during weathering |
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| written in 1910-1911 by Friedrich Schumacher on the ore deposits owned by “Ruda-12 Apostoli” company, a mineral...educated in Germany. The collection has been added with new gold specimens from the ore deposits around...between 1920 and 1948. Other mineral samples from ore deposits of Romania or from all around the world...383 mineral samples, 53 rock samples, as well as ore processing reagents, mining models, mining devices...belonged to mining companies based in the Brad region. Today, it is owned by S.C. “MINVEST” S.A. Deva |
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| large ilmenite masses could be seen on the old dumps. In 1975-1976, Brunet collected sharp, black, flattened...7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment, many more "lost" localities...localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during |
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| Broken Hill, bernalite has also been found in Germany, but to date it has not been made synthetically...the silicate minerals of the Earth's mantle, a region which constitutes 60% of the volume of the planet... Namibia; the Clara Mine in the Black Forest, Germany; Broken Hill, New South Wales, and Langban, Sweden...mining around the turn of the century, and the mine dumps have continued to provide interesting specimens...specimens from pockets in the primary ores. The dumps of this mine, particularly on the Western Lode, |
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| Lieber Heidelberg, W. Germany Olaf Medenbach Ruhr Universitat Bochum Bochum, W. Germany Eric Offermann Arlesheim...Windisch 30 Van Wouw Street Groenkloof, Pretoria West Germany Christian Weise Verlag Oberanger 6 D-8000 Munchen...Austria, OS 624; in Switzerland, SFr 76.80; in Germany, DM 76.80). Send to: Magma, Verlag Rainer Bode...Bode, Krokusweg 13, D-4630 Bochum 7, West Germany. For those readers of Magma and of the Mineralogical Record...percent or the total amount in the ore. It looked like a very fair ore and they said it ran about 7 ounces |
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| Ave., Stratford, Conn. Pyrolusite was the chief ore of manganese mined at Cartersville. Cartersville...hunting manganese in one of the old abandoned ore dumps from a long ago mine, north of Cartersville. At...side of the Atherton Tableland as this mountainous region is called, there is also' a find of fossils, quite...tin recovered from one of its mines. Just as tin ore it possibly might not interest you but this sample...turned out to be a waterworn, rounded and very nice siderite, 21/^ x 21^ inches in size. Tiny white barnacles |
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| attraction. Photo courtesy of Peter Megaw. Introduction ore mining at the Ojuela ceased in the mid-1940’s, but...respective heydays, exploiting hydrothermal polymetallic ore deposits. The Tsumeb deposit, however, is geologically...has done so only during the last 60 years, after ore mining had largely come to an end (we almost dare...specimens the miners probably encountered and crushed as ore or discarded as waste during those 340+ years). Both...fluorite, celestine, apatite, and magnetite iron ore, have produced few noteworthy specimens. But the |
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| Ueber Heidelberg, W. Germany Olaf Medenbach Ruhr Universitat Bochum Bochum, W. Germany Eric Offermann Arlesheim...genetic relationship to diamond and may vary from one region to another. The accessory minerals are well known...groundwater levels. (c) Overburden. Deposits overlying the ore gravels can be even thicker. This overburden is typically...diving gear which they will take turns using. The ore grade is always low, ranging from 1 carat per cubic...of gravel. The gem percentage varies from region to region, but generally 20% to 40% of the diamonds |
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| available). Arizona being the remarkably mineral-rich region that it is, we have not yet come close to describing...yielded hundreds of tons of wulfenite crystals as ore. And yet it is probably among the least visited by...recounted by Dowell (1978a, 1978b). The Total Wreck ore deposit was discovered in 1878 by John T. Dillon...levels, and miners began hauling out 50 tons of ore per day, which at first was stockpiled on the dump...mine opening to the mill, and a mule-drawn 5-ton ore car was brought in. In 1882 a massive steam-powered |
 | Mao, Jingwen, Wang, Yitian, Li, Houmin, Pirajno, Franco, Zhang, Changqing, Wang, Ruiting (2008) The relationship of mantle-derived fluids to gold metallogenesis in the Jiaodong Peninsula: Evidence from D–O–C–S isotope systematics. Ore Geology Reviews, 33 (3) 361-381 doi:10.1016/j.oregeorev.2007.01.003 | Journal (article/letter/editorial) |
| Available online at www.sciencedirect.com Ore Geology Reviews 33 (2008) 361 – 381 www.elsevier.com/locate/oregeorev...fluid reservoir and mixed with crustal fluids. The ore-forming age is later than both the Jurassic biotite...and Lü et al. (2002) have 362 J. Mao et al. / Ore Geology Reviews 33 (2008) 361–381 discussed, in...There are conflicting views regarding the sources of ore-forming fluids in the Jiaodong gold province. The...prompted a group of researchers to suggest that the ore-forming fluids were dominantly derived from granitic |
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| portray the main chemical elements of the Tsumeb ore deposit and sym bolize from top to bottom: Copper...Eisenbahn-Gesellschaft: 1906-1946 . Tsumeb Mine . Ore Concentration and Smelting Ra:ilway and Communications...venturing too far down a blind alley in search of ore. And so it came about that I paged throitgh most...The search for a picture of the original Tsumeb ore outcrop was first rewarded by a gift from Dr. A....their keeping. The section on the present Tsumeb smelter was largely written by the Superintendent, Mr. |
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| area on Revillagigedo Island were examined because ore deposits at both localities contain minerals commonly...Forest Service. The Hyder district is a mountainous region of great relief. The valley floors of Salmon River...rarely fall below zero. GEOLOGY The geology and the ore deposits of the Hyder district have been described...of this type is a siliceous heavy-sulfide body of ore in the Premier mine in Canada (Schofield and Hanson...RADIOACTIVE DEPOSITS, S. E. ALASKA 31 show that the ore contains moderate to high amounts of gold and practically |
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| Silicates; Precious Stones vs. Gemstones; Colorful Ore Minerals 2. Mineral Environments (I): The Igneous...Gemstones and Minerals Found in Sediments; Weathered Ore Minerals; Solution Minerals in Sedimentary Strata;...important use of hard stones, rocks, sands and ochers, ore minerals, gemmy substances, and crystals. Almost...abandoned, one is also sure to find extensive mine dumps sloping steeply down from the shaft or tunnel entrances...be found. Old mine dumps often reveal a varied assortment of brightly colored ore minerals, raw nugge |
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| »ii»n>m • • • > • 11 »!•» ! • • • • » ^ ore dumps of the Bethlehem Steel Corporation's Cornwall...Society traveled to a Siderite mine near Roxbury, Conn. Fine specimens of Siderite, Pyrite, Garnets, and...C. Olmsted spoke briefly on the geology of that region, then B. J. Cate described the Yellowstone Park...England, and was printed in 1797. Another one from Germany was printed in 1753. Both have color plates. Mr |
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| quite a few of these. They are more value as an ore. This fell ow was not to or less round and stained...have gotten on, so we in important amounts in the ore, which is resigned ourselves and returned to thr...of constituents of true fulgurites. this entire region are of ancient origin. Ful1uritic It is obvious...she does have some minerals. In the T ampa Bay region there is a n1aterial that has been polished and...story of the Tampa Bay region. I did not need that. Also, I had visited that region and collected an auto |
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| after walking about 1,000 feet, we spied the wast_e dumps Ct'. least ½ mile further on, across large ooen...the right of the main road. It ls called the "Red Ore Road" and its name is very appropriate for at the...a swamp and becomes very wet, deep-red from the ore, and gooey. We did not realize its condition until... This had me so worried that collecting at the dumps was not so pleasant. The mine is about ½ mile in...in a flat level field. How they ever discovered ore in this area is a mystery as the mine is practically |
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| its final aban donment 3.5 to 4 million tons of ore were mined, yielding about 400,000 tons of pig lead...into white marble. The ore ac companies dacite-liparite and appears in the region of big tectonic fractu...mines are located on dacite liparite apophyses, ore veins being richest at the intersections of apophyses...mining to date. There are four principal types of ore · bodies at Balya, which may be summarized as follows...disseminated replacement or «porphyry» ore. Below minus 80 metr.rs the ore is too diluted to be of economic |
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| Banerjee Uranium deposits of the Inkay — Mynkuduk ore field, Kazakhstan..................................Filip Perspective to discover profitable uranium ore in Ukraine.........................................basin and one in the Syr Darya basin. The uranium ore in these basins is concentrated along roll fronts...Imouraren deposit is currently under evaluation. The ore at Imouraren, which was discovered in the late 1960s...currently exploit eight individual deposits. The uranium ore is distributed along roll fronts in Cretaceous, Paleogene |
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| Tooele County. 7. Map and longitudinal profile of ore bodies in Scranton mines. 8. Sketch map of the geology...6. Diagram showing fissure vein of oxidized zinc ore, Redmond silver mine, Redmond_________________________________...18 8. Section of a large low-grade oxidized zinc ore body in the hanging wall of a lead vein, Lower Mammoth..._ 19 9. Diagrammatic section of the Horn Silver ore body, Frisco____ 20 36 10. Sketch map of Tecoma and...districts, mines, claims, and prospects of oxidized zinc ore in Utah__________________________________________ |
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| of debris washed down fromthe Roughton Gill mine dumps under Iron Crag C O N T E N INTRODUCTION...Elizabeth I to work copper and silver there. The smelter they built at Keswick was the largest in Europe...contributions on the topographical mineralogy of the region updating the earlier work of Greg & Lettsom (1858);...elsewhere in the Lake District, where the dominant ore minerals are sulphides of lead, copper and zinc,...antimonyin the Caldbeck Fells ores that the master smelter Joachim ve Gaunse referred to in 1581 as oneof |
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| Lieber Heidelberg, West Germany Olaf Medenbach Bochum-Querenburg, West Germany Eric Offermann Arlesheim...symposium. FM Portland Symposium Friends of Mineralogy, Region 12, Pacific Northwest, spon sored its Second Annual...that now prevails in our membership and is why our region anticipates a bigger, better and more interesting...at Untersulzbach in Austria (Palache, 1902). The region around the Jumbo mine has pro duced matrix specimens...mining con struction including an aerial tram and an ore loading dock, were built in the district in mining |
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| small needles of pegmatite among which oxidized ore and S.P, aggregate. M.G.S. * Gosforth ’, 1937,...composed oligoclase, with small amounts and iron ore. of biotite and of quartz, microcline and muscovite...brown hornblende. Small quantities of opaque iron ore are present and there are occasional prisms of zircon...forms large irregular crystals associated with iron ore and apatite. Orthite is a scarce accessory. S.P....muscovite, zircon, chlorite and a little hydrated iron ore are accessory. S.P. 1938 (1940), p. 95. | filet |
 | Sun, Jing, Strosnider, William H.J., Nairn, Robert W., LaBar, Julie A. (2020) Water quality impacts of in-stream mine tailings on a headwater tributary of the Rio Pilcomayo, Potosí, Bolivia. Applied Geochemistry, 113. 104464 doi:10.1016/j.apgeochem.2019.104464 | Journal (article/letter/editorial) |
| Hemisphere (World Bank, 2009). Communities in 75 the region rely on the river for washing, irrigation, fishing...through ore dumps and tailing piles, point-source tailing discharges from Potosí’s 85 ingenios (ore processing...gangue materials 103 such as quartz, tourmaline, siderite, and kaolinite. Host rock is pyritized near the...calcium oxide (CaO) is commonly 243 used in the ore separation process in Potosí, leading to tailings...292 city). 293 3.3 Speciation 294 The study region consists of Upper Cretaceous and Tertiary bedrocks |
