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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 75 for “"ore deposits"”.
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Fluid Inclusion Characteristics in Magmatic-Hydrothermal Ore Deposits
Magmatic-hydrothermal ore deposits are formed in association with aqueous fluids that exsolve from hydrous silicate melts during ascent and crystallization. These fluids are invariably trapped as inclusions in vein-filling minerals associated with hydrothermal fluid flow, and their composition may …
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Characterization of the CRM occurrences in ore deposits of Sardinia
… “Characterization of the CRM occurrences in ore deposits of Sardinia” and its aim is to further study the geological occurrence of economic raw materials in various mineral deposits of southern and central Sardinia, with a focus on a specific class of deposit named “skarns”. In the last …
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A mathematical model of geophysical exploration for elongated ore deposits
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1958.
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Spatial and temporal evolution of fluids in hydrothermal ore deposits
… depending on<br />the level of erosion. Therefore understanding the geochemical zonation of magmatic-hydrothermal<br />ore deposits opens the possibility to detect deep magmatic-hydrothermal<br />systems, and to assess qualitatively the degree of erosion that has taken place in the area<br …
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Electrical and seismic responses of shallow, volcanogenic, massive sulphide ore deposits
… and seismic refraction responses of the Woodlawn Orebody and Mt.Bulga Deposit are examined and compared. Both exhibit similar responses produced mainly by uneconomic and disseminated sulphide mineralization and host rock features, demonstrating that the magnitude and character of electrical and …
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The isotope geochemistry of uranium: Igneous petrology, ore deposits, and groundwater contamination
… settings: basalt differentiation, uranium ore genesis, and the remediation of a uranium-contaminated groundwater system. In the latter two cases, 238U/235U is used as a tracer of uranium reduction. 238U preferentially enters the reduced (solid) U phase, thus analysis of U ores can reveal …
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Correlations between manganese and copper ore deposits and their relationship to plate tectonics.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1974.
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A thermochemical study of the ore deposits of the Milliken mine, New Lead Belt, Missouri
<p>"The ore body at the Milliken mine is a typical Mississippi Valleytype ore deposit. Mineralization is in a dolostone and structures are subtle, but very important ore controls. The major mineralogy is simple, predominately galena, luminescent hydrothermal dolomite, sphalerite and chalcopyrite. …
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The Nature of Fluids in Hydrothermal Copper and Molybdenum Ore Deposits - An experimental and analytical study
… fluids in porphyry Cu and porphyry Mo deposits was studied using synthetic and natural fluid inclusions by optical microscopy, microthermometry, Raman spectroscopy, and LA-ICP-MS. The partitioning of Cu between vapor and brine in aqueous NaCl-S ± KCl ± FeCl2-rich fluids was investigated …
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Paleomagnetic and mineral magnetic studies of zinc-lead ore deposits in the Metaline (Washington state, USA) and Midlands (Ireland) ore fields
Keywords: Ore deposits, Ireland, Ore fields, Zinc-lead ore, Metaline ore field, Midlands ore field . Carbonate-hosted Zn-Pb deposits of the Metaline (USA) and Irish Midlands (Ireland) ore fields exhibit features of both MVT and SEDER deposits, and therefore, play an important role in the debate …
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Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… thermometry in geothermal fields and mineral deposits (iii) Application of carbonate and hydrous mineral isotope tools in epithermal precious metal deposits A novel approach to measure δ2H and δ18O in hydrous minerals is presented in Chapters 3-4. Measurement was carried out on …
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Mineralogical, textural, and paragenetic studies of selected ore deposits of the Southeast Missouri lead-zinc-copper district and their genetic implications
<p>“A detailed paragenetic study of Pb-Zn-Cu ores from the Viburnum Number 28, Brushy Creek, and Goose Creek mines in the Southeast Missouri lead district indicates a complicated paragenesis characterized by repeated periods of mineral deposition. The sequence is composed of nineteen minerals …
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Petrographic, geochemical, and textural analyses of interbedded gypsum and Cu-ore deposits in the Upper Miocene Boleo Formation, Baja California Sur, México
… metalliferous clay-rich facies within the DDB10 core reflect shifts between semi-restricted marine and subaerial sabkha environments. A gypsum accumulation rate of ~0.32 mm/yr in the Lower DDB10 Section reflects slow deposition influenced by marine restriction, clastic input, and hydrothermal …
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Compaction-Driven Groundwater Flow and Heat Transfer in Intracratonic Sedimentary Basins and Genesis of the Upper Mississippi Valley Mineral District (Hydrology, Migration, Petroleum, Ore Deposits, Numerical Models)
… brines and formation of Mississippi Valley-type ore deposits.
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Assessing the geologic sources of manganese in the Roanoke River watershed
… drinking water standard. A historic belt of Mn ores, the James River-Roanoke River Manganese District (JRRRMD), occurs in the eastern part of the watershed. The project objectives were to 1) evaluate the formation of the JRRRMD ore deposits and 2) analyze existing groundwater chemistry data to …
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A geochemical study of neoproterozoic palaeo-evaporites and their possible role in metallogenesis in the Damara Belt of Namibia
… highly saline fluids associated with base metal ore deposits in various parts of the world. Data on the nature of these former evaporites and their associated connate fluids, however, is frequently quite sparse, and the link between the ore deposits and the source evaporites is usually intuitive, …
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Manipulating aqueous chemistry environments in extractive metallurgy
… route for the recovery of nickel from lateritic ore deposits that is both economical and environmentally acceptable.
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Effects of adding acid plant sulfur on heap leaching
… various precious metals from their natural ore deposits. Copper ore deposits are found across the world and heap leaching of copper has been implemented effectively for years. The ore is broken down to copper ions and elemental sulfur in the heap. Acid plants are used in mines to replenish …
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