hydrothermal alteration

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• hydrothermal alteration — GLOSSARY OF VOLCANIC TERMS Changes in rocks or minerals brought about by metasomatism with hydrothermal fluids (generally hot water) …   Glossary of volcanic terms

• Hydrothermal vent — Marine habitats White smokers emitting liquid carbon dioxide at the Champagne vent, Northwest Eifuku volcano, Marianas Trench Marine National Monument Littoral zone …   Wikipedia

• alteration mineral assemblages — GLOSSARY OF VOLCANIC TERMS Mineral assemblages found in rocks that result from chemical reactions between the original rock and an agent of alteration (for example, hot volcanic vapors or hydrothermal fluids) …   Glossary of volcanic terms

• pipe-like alteration zone — GLOSSARY OF VOLCANIC TERMS A type of narrow, cylindrical or inverted cone shaped, discordant hydrothermal alteration zone that is typically confined to a narrow region in close proximity to a synvolcanic structure (e. g. synvolcanic fault).… …   Glossary of volcanic terms

• Conodont Alteration Index — The Conodont Alteration Index (CAI) is used to estimate the maximum temperature reached by a sedimentary rock using thermal alteration of conodont fossils. Conodonts in fossiliferous carbonates are prepared by dissolving the matrix with acid,… …   Wikipedia

• semiconformable alteration zone — GLOSSARY OF VOLCANIC TERMS A regional zone of hydrothermal alteration typically characterized by a sheet like or cloud like geometry. Semiconformable alteration zones are generally quite extensive in permeable rock units (e.g. tuffs, medium to… …   Glossary of volcanic terms

• Volcanogenic massive sulfide ore deposit — Volcanogentic massive sulfide ore deposit at Kidd Mine, Timmins, Ontario, Canada, formed 2.4 billion years ago on an ancient seafloor. Volcanogenic massive sulfide ore deposits (VMS ) are a type of metal sulfide ore deposit, mainly Cu Zn Pb which …   Wikipedia

• Uranlagerstätte — Uranlagerstätten sind natürliche Anreicherungen von Uran, aus denen sich das Element wirtschaftlich gewinnen lässt. Inhaltsverzeichnis 1 Grundlagen 1.1 Geochemie des Urans 1.2 Mineralogie 2 …   Deutsch Wikipedia

• Geology of Mars — Mars   Mars as seen by the Hubble Space Telescope Designations …   Wikipedia

• Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia

• Ore resources on Mars — Mars may contain valuable ores that will be very useful to future colonists.[1] The abundance of volcanic features together with widespread cratering are strong evidence for a variety of ores. [2] Contents 1 How deposits are made 2 …   Wikipedia