Most hydrothermal deposits form from hot, metal-rich fluids that are left during the late stages of the movement and cooling of magma.
Gold and silver deposits can be found in geologic settings such as volcanic regions, hydrothermal veins, and sedimentary rocks. These deposits are often associated with tectonic plate boundaries and areas of past volcanic activity.
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Magma and hydrothermal fluids are hot fluids that can move through small cracks in rock. Magma is molten rock beneath the Earth's surface, while hydrothermal fluids are water heated by volcanic activity that can carry minerals and gases. Both can contribute to the formation of igneous rocks and mineral deposits.
Ore deposits typically form from the concentration of ore minerals within Earth's crust through various geological processes such as hydrothermal fluids, magmatic segregation, or sedimentary accumulation. These processes involve the mobilization and concentration of valuable elements or minerals in specific areas, leading to the formation of economically viable deposits.
Ore deposits are often associated with hydrothermal processes, where minerals are deposited from hot fluids circulating in the Earth's crust. Gem crystals are often found in igneous and metamorphic rocks, where the conditions for their formation are present, such as high pressure and temperature.
hydrothermal solutions
hydrothermal solutions
hydrothermal solutions
Subhash Jaireth has written: 'Hydrothermal geochemistry of Te, Ag2Te, and AuTe2 in epithermal precious metal deposits' -- subject(s): Geochemistry, Hydrothermal deposits, Tellurium ores
Hubert Lloyd Barnes has written: 'Geochemistry of hydrothermal ore deposits' -- subject(s): Geochemistry, Hydrothermal deposits 'How to prospect for uranium' -- subject(s): Prospecting, Uranium
Sulfide ores and oxide ores
Most hydrothermal deposits form from hot, metal-rich fluids that are left during the late stages of the movement and cooling of magma.
William R. Normark has written: 'Geologic setting of massive sulfide deposits and hydrothermal vents along the southern Juan de Fuca Ridge' -- subject(s): Hydrothermal deposits, Sulfides, Sulphides
Igneous processes and hydrothermal solutions
Philip Martin Bethke has written: 'The Creede, Colorado ore-forming system' -- subject(s): Ore deposits, Hydrothermal deposits
Hydrothermal gold deposits are formed when hot, mineral-rich fluids rise from deep within the Earth and come into contact with cooler rocks near the surface. As the fluids cool and deposit their minerals, gold can accumulate in cracks and fractures in the rock, forming veins or deposits of gold. These types of deposits are found in association with volcanic or tectonic activity.
J.D Ridge has written: 'SElected bibliographies of hydrothermal and magmatic mineral deposits / by John Drew Ridge' -- subject(s): Mineral deposits - Bibliography