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Showing 1 to 15 of 15 for “"Mississippi Valley-type"”.
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Prediction of Mississippi-Valley type ore fluid metal concentrations from solid solution metal concentrations in ore-stage minerals
Mississippi-Valley-type (MVT) deposits have some of the greatest enrichments of Pb, Zn, Ba, and F in the Earth's crust. Fundamental to understanding how these elements were transported and precipitated to form MVT deposits is knowledge of their concentrations in the ore fluids. Recent research …
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Source Constraints of Ore Metals in Mississippi Valley-type Deposits in Central and Eastern Tennessee using Pb Isotopes
<p>The Mississippi Valley-Type (MVT) Central and East Tennessee (TN) Districts contain economically significant lead-zinc deposits that occur in the Early Ordovician carbonates of the Knox Group. Although both districts share similar host rock, have similar temperatures of formation, and typically …
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Comparative Geochemical Analysis of Ordovician and Mississippian Cherts in Relation to the Northern Arkansas and the Tri-State Mississippi Valley-type Ore Districts
<p>It has been hypothesized that Ordovician, Mississippian, and younger carbonate and clastic formations found within the Ouachita Basin of west-central Arkansas and northward onto the Ozark Dome have experienced interaction with hydrothermal fluids due to tectonic forces produced by the Ouachita …
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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)
… of sedimentary brines and formation of Mississippi Valley-type ore deposits.
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Depression of pyrite in polymetallic sulfide flotation using chitosan-grafted-polyacrylamide polymers
… flotation studies of complex sulfide ore of Mississippi Valley Type (MVT) showed that Chi-g-PAM outperformed other pyrite’s depressants at producing less pyrite-diluted concentrates. Statistical optimization of the flotation process of MVT ore in relation to the structural characteristics of …
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Pattern formation in geochemical systems.
… first time for this oscillatory crystallization type of problems. A quantitative model of banding in Mississippi Valley-type sphalerite is presented. Banded ring-like patterns are shown to arise due to a self-propagating sequence of growth and dissolution (coarsening wave). A two-dimensional …
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Geochemical Analysis of Mississippian Cherts and Devonian-Mississippian Novaculites, Southern Midcontinent Region
… for the siliceous deposits in the Lower Mississippian Boone Formation and the Devonian-Mississippian Arkansas Novaculite in the southern midcontinent. Mississippi Valley-type Pb-Zn ore deposits in the Tri-State District and the Northern Arkansas District were deposited by hydrothermal …
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Inorganic and organic geochemistry of the zinc ores of the Idol Mine, East Tennessee
The Idol Mine, operated by Clinch Valley Mining Company, is located at the southern end of the Copper Ridge District in Northeastern Tennessee. It is a relatively typical carbonatehosted zinc (Mississippi valley Type) deposit. The ores occur as interfragmental fillings within carbonate breccia …
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The timing, composition, and source of subsurface diagenetic waters responsible for sulfide and carbonate mineralization in solution cavities of the ordovician galena group limestone, North Aurora, Illinois, USA
… the dissolution of rock and the deposition of Mississippi Valley-Type (MVT) minerals in sedimentary basins. Tens-of-centimeter scale calcite crystals concentrically zoned with sulfide minerals and growing within meter-scale solution cavities were recently discovered on the flank of the Michigan …
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Cement types and cementation patterns of Middle Ordovician ramp- to-basin carbonates, Virginia
… to be genetically linked to Late Paleozoic, Mississippi Valley-type mineralization. Zoned peritidal and burial cements are mainly confined to southeastern portions of the ramp where cementation was influenced by meteoric waters from tectonic uplands and was carried northwest by paleoaquifers. …
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A study of the berg Aukas-type Pb-Zn-V deposits in the Otavi mountain land, Namibia
… taking place in carbonate-hosted Berg Aukas-type Zn-Pb-V deposits of the Otavi Mountain Land in Northern Namibia. Numerous studies have shown that ore formation in Mississippi Valley-type deposits bears a close relationship with carbonate diagenesis and basin evolution. The application of …
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Petrology and mineralogy of certain portions of the Fredericktown deposits
… years. The district is a typical example of the Mississippi Valley Type deposits. The ores occur in Upper Cambrian sediments overlying Precambrian rocks.</p> <p>The Fe-Cu-Pb-Zn (-Co-Ni) - sulphide deposits of Fredericktown occur over a few square kilometers in sediments overlying two 'granite …
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Characterization of the CRM occurrences in ore deposits of Sardinia
… (Arburèse region) mines, hosting several giant Mississippi Valley Type (MVT) deposits and their associated non-sulfide ores and a 15 km long hydrothermal Zn-Pb vein system respectively. Aside from Zn-Pb MVT deposits, southern Sardinia is also characterized by several Au-As(-Sb-W), Ag-Sb, F-Ba-Pb …