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Alternative Title: hydrothermal ore deposit Hydrothermal mineral deposit, any concentration of metallic minerals formed by the precipitation of solids from hot mineral-laden water (hydrothermal solution). The solutions are thought to arise in most cases from the action of deeply circulating water heated by magma.
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richest ore deposits. Ores, including those of tin, tungsten, copper, lead, zinc, gold, silver, mercuryand uranium, can all form by hydrothermal processes. All hydrothermal deposits have formed from hot, aqueous (watery) fluids containing metals in solution.
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A hydrothermal ore deposit is one in which the ore minerals were precipitated from aqueous high-temperature fluid solutions, where: Aqueous implies that the solvent is water. The fluids are solutions, and can have salinities up to several times that of seawater. They are in some cases concentrated brines in which salts form more than half the solution by mass. Additionally the fluid may be a ...
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Geochemistry of Hydrothermal Ore Deposits. September 2020; DOI: 10.13140/RG.2.2.22438.96327. Affiliation: University of Colorado Boulder; Project: Economic Geology; Authors: Mohammad Hassan ...
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2019-02-15 Hydrothermal ore deposits at convergent plate boundaries represent extraordinary metal enrichment in the continental crust. They are generally associated with felsic magmatism in extensional settings at high thermal gradients.
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This thoroughly revised and expanded new edition incorporates the most recent research findings on the subject, such as the discovery of dramatic undersea hydrothermal vents. It describes the key process in the generation of ore deposits and emphasizes solid theoretical understanding.
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Hydrothermal Ore Formation An ore is a rock that is rich in the metals, often times metal. The formation of hydrothermal ores is attributed to the hydrothermal solution or fluids that filter metals and minerals from the rock. These metals are then deposited into fracture and cracks within the rock called: veins.
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A hydrothermal replacement deposit occurs when hot circulating aqueous solutions replace the original rock with new mineral species. This typically occurs in more soluble rocks such as limestone. Hydrothermal replacement deposits are a form of hydrothermal metamorphism or metasomatism.
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Ore deposits are crustal concentrations of useful elements that can be exploited at a profit. Like all crustal rocks, they consist of minerals formed by geological processes. There are four basic geological requirements for any ore deposit to form (Figure 1): - i) a source for the ore components (metals and ligands); ii) a mechanism that either transports these components to the ore deposit ...
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A hydrothermal ore deposit is one in which the ore minerals were precipitated from aqueous high-temperature fluid solutions, where: Aqueous implies that the solvent is water. The fluids are solutions, and can have salinities up to several times that of seawater.
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Hydrothermal/metasomatic fluids are associated with metamorphism, igneous activity, and even sedimentary diagenesis. They are hot fluids that contain lots of ions and alter surrounding rocks and can deposits ores and other vein-fillings. 5.
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The University of Ottawa Joint Modular Courses in Hydrothermal Ore Deposits are intensive 8-day short courses on the geology and genesis of ore deposits.
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Hydrothermal ore deposits During the early 1900s, various geologists worked to classify hydrothermal ore deposits that they assumed formed from upward-flowing aqueous solutions. Waldemar Lindgren (1860–1939) developed a classification based on interpreted decreasing temperature and pressure conditions of the depositing fluid.
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The Yankee Lode, a small but rich magmatic-hydrothermal vein deposit in eastern Australia, is part of a classic and well-described polymetallic province zoned around the large Mole Granite...
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Hydrothermal ore deposits During the early 1900s, various geologists worked to classify hydrothermal ore deposits that they assumed formed from upward-flowing aqueous solutions. Waldemar Lindgren(1860-1939) developed a classification based on interpreted decreasing temperature and pressure conditions of the depositing fluid.
More
Hydrothermal Ore Formation An ore is a rock that is rich in the metals, often times metal. The formation of hydrothermal ores is attributed to the hydrothermal solution or fluids that filter metals and minerals from the rock. These metals are then deposited into fracture and cracks within the rock called: veins.
More
2015-01-25 Homework For A2 Geology at Runshaw (sorry no sound it wouldn't attach or upload with it :/ )
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Phyllic alteration is associated with porphyry Cu deposits, but also with mesothermal precious metal ores and volcanogenic massive sulfide deposits in felsic rocks. This alteration grades into the potassic type by increasing amounts of (K, aK) K-feldspar and/or biotite, and into the argillic type by increasing amounts of (H, aH)clay minerals. 4.
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Ore deposits are crustal concentrations of useful elements that can be exploited at a profit. Like all crustal rocks, they consist of minerals formed by geological processes. There are four basic geological requirements for any ore deposit to form (Figure 1): - i) a source for the ore components (metals and ligands); ii) a mechanism that either transports these components to the ore deposit ...
More
Hydrothermal ore deposits During the early 1900s, various geologists worked to classify hydrothermal ore deposits that they assumed formed from upward-flowing aqueous solutions. Waldemar Lindgren (1860–1939) developed a classification based on interpreted decreasing temperature and pressure conditions of the depositing fluid.
More
Hydrothermal Ore Formation An ore is a rock that is rich in the metals, often times metal. The formation of hydrothermal ores is attributed to the hydrothermal solution or fluids that filter metals and minerals from the rock. These metals are then deposited into fracture and cracks within the rock called: veins.
More
Hydrothermal deposits are never formed from pure water, because pure water is a poor solvent of most ore minerals. Rather, they are formed by hot brines, making it more appropriate to refer to them as products of hydrothermal solutions. Brines, and especially sodium-calcium chloride brines, are effective solvents of many sulfide and oxide ore minerals, and they are even capable of dissolving ...
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2015-07-16 This important class of ore deposits is the source of most of the world’s metals. Hydrothermal deposits are mined for almost 100 % of our Pb, Zn, Mo and Ag, 60–90 % of our Cu, Au and U, as well as gemstones and industrial materials such as clay minerals and quartz.
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Sphalerite occurs with other sulphides in hydrothermal ore veins (as with the specimens below), in disseminated deposits, in veins in igneous rocks or in contact metasomatic deposits. Sphalerite forms in hydrothermal veins when zinc ions combine with sulphate ions.
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Epithermal precious metal ore deposits are probably the fossil equivalents of high-temperature geothermal systems like Broadlands, New Zealand, and Steamboat Springs, Nevada.
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Keywords: modern volcanism, hydrothermal-magmatic systems, ore minerals, geothermal deposits Synopsis Ore and silicate mineral formations in the shape of globules and other shapes identified within central parts of modern high temperature hydrothermal-magmatic systems (in geothermal deposits) of the Kuril-Kamchatka island arc were described in detail. Native iron, magnetite globules and zonal ...
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This thoroughly revised and expanded new edition incorporates the most recent research findings on the subject, such as the discovery of dramatic undersea hydrothermal vents. It describes the key...
More
Phyllic alteration is associated with porphyry Cu deposits, but also with mesothermal precious metal ores and volcanogenic massive sulfide deposits in felsic rocks. This alteration grades into the potassic type by increasing amounts of (K, aK) K-feldspar and/or biotite, and into the argillic type by increasing amounts of (H, aH)clay minerals. 4.
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and the character of the hydrothermal alteration zones. Thus, using these studies as a model, we chose a number of sub-basins representative of the major styles and ages of mineral-ization in the study area for integrated geologic and aqueous geochemical studies. Details of the ore deposits
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Hydrothermal deposits are never formed from pure water, because pure water is a poor solvent of most ore minerals. Rather, they are formed by hot brines, making it more appropriate to refer to them as products of hydrothermal solutions. Brines, and especially sodium-calcium chloride brines, are effective solvents of many sulfide and oxide ore minerals, and they are even capable of dissolving ...
More
Hydrothermal circulation, in particular in the deep crust, is a primary cause of mineral deposit formation and a Gypsumerstone of most theories on ore genesis. Hydrothermal ore deposits. During the early 1900s, various geologists worked to classify hydrothermal ore deposits that they assumed formed from upward-flowing aqueous solutions.
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Hydrothermal alteration occurs when hot waters free calcium and carbonate ions from separate sources, and these ions combine and precipitate calcite. Sphalerite occurs with other sulphides in hydrothermal ore veins (as with the specimens below), in disseminated deposits, in veins in igneous rocks or in contact metasomatic deposits. Sphalerite ...
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The nature of hydrothermal processes found from the rock record through mineralogical evidence on ore deposits was naturally supplemented by data from investigations of modern and active geothermal systems. Our initial consideration was to ascertain whether geothermal processes and hydrothermal ore genesis were related phenomena. In fact, it turned out that their ranges of temperatures and ...
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1994-08-18 Magmatic fluids, both vapour and hypersaline liquid, are a primary source of many components in hydrothermal ore deposits formed in volcanic
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Keywords: modern volcanism, hydrothermal-magmatic systems, ore minerals, geothermal deposits Synopsis Ore and silicate mineral formations in the shape of globules and other shapes identified within central parts of modern high temperature hydrothermal-magmatic systems (in geothermal deposits) of the Kuril-Kamchatka island arc were described in detail. Native iron, magnetite globules and zonal ...
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and the character of the hydrothermal alteration zones. Thus, using these studies as a model, we chose a number of sub-basins representative of the major styles and ages of mineral-ization in the study area for integrated geologic and aqueous geochemical studies. Details of the ore deposits
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Hydrothermally-altered host rocks that surround ore deposits form large, up to kilometer-scale, concentric haloes that define the alteration footprint that characterizes many ore deposit types such as porphyry, VMS, epithermal, skarn, Carlin and orogenic gold deposits. The isotope alteration footprint usually extends well-beyond ore and other types of visible and mineralogical alteration as ...
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Hydrothermal process is the most common ore forming process. Water is heated by the magma chamber and this water dissolves metals. Metals are dissolved in the water and this solution seeps through cracks, fractures and through permeable rocks until they are precipitated and form a deposit. There are three types of water sources . Magmas of granitic composition when solidifies leaves a
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Geochemistry of Hydrothermal Ore Deposits, 3rd Edition. Hubert Lloyd Barnes (Editor) ISBN: 978-0-471-57144-5 June 1997 992 Pages. Print Hardcover. Download Product Flyer Download Product Flyer. Download Product Flyer is to download PDF in new tab. This is a dummy description. Download Product Flyer is to download PDF in new tab. This is a dummy description. Download Product Flyer is to ...
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