Web19 sep. 2024 · Hydrothermal replacement deposits are formed in highly reactive rocks such as limestone and dolostone or their metamorphosed equivalents, that is marble. Reaction of these carbonate rocks with hydrothermal solutions can lead to a … Web1 jan. 2024 · Hydrothermal mineral replacement reactions are one of the key ore-forming processes in the Earth’s crust as they bear potential to cause dissolution of gangue or economically less significant minerals and reprecipitation of economically valuable minerals such as metal-bearing sulfides (Altree-Williams et al., 2015, Li et al., 2015 ...
Textures of Ore Deposits and associated features - College of …
http://science.marshall.edu/elshazly/Econ/textures.doc Hydrothermal mineral deposits are accumulations of valuable minerals which formed from hot waters circulating in Earth's crust through fractures. They eventually create metallic-rich fluids concentrated in a selected volume of rock, which become supersaturated and then precipitate ore minerals. In some occurrences, minerals can be extracted for a profit by mining. Discovery of mineral deposits consumes considerable time and resources and only about one in every one t… rich pure luxury argan
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Web1 dag geleden · Veins and Hydrothermal Deposits Veins are mineral deposits that form when a preexisting fracture or fissure within a host rock is filled with new mineral material. The deposition of minerals is ... WebII- Textures of hydrothermal ore deposits and skarns: A- Replacement textures Replacement is the process of almost simultaneous solution and deposition by which a new mineral of partly or totally different chemical composition may grow in the body of an old mineral or mineral aggregate. WebThe bacterial filaments are selectively replaced by prousite (Ag3AsS3), pearceite3(Ag14.7–xCu1.3+xAs2S11), chalcopyrite (CuFeS2) and rarely by galena (PbS). Our observations suggest that bacterially mediated processes selectively precipitate silver, arsenic and copper, and that biological processes may contribute to precious-metal … rich pure luxury argan oil