Gold Platinum Report - El Capitan Precious Metals, Inc.
... contains local high values in Pt, Pd and Au (Macdonald, 1987; Coveney and others, 1992; Mountain and Wood, 1988). The Kupferschiefer is a Permian (250 Ma), 1 m thick carbonaceous-calcareous bed that underlies an area of 20,000 km2 and includes large areas of economic Au-Ag-Pb-Zn ore. The Kupferschie ...
... contains local high values in Pt, Pd and Au (Macdonald, 1987; Coveney and others, 1992; Mountain and Wood, 1988). The Kupferschiefer is a Permian (250 Ma), 1 m thick carbonaceous-calcareous bed that underlies an area of 20,000 km2 and includes large areas of economic Au-Ag-Pb-Zn ore. The Kupferschie ...
Buchite type glasses in the West Eifel Volcanic Field (Germany
... exist in upper continental and ocean crust [1]. SP anomalies represent both local and regional electric fields. The most widespread SP anomalies associated with hydrothermal and subsurface water flow (steaming potential) [2]. Under the influence of electric energy electrochemical processes are inevi ...
... exist in upper continental and ocean crust [1]. SP anomalies represent both local and regional electric fields. The most widespread SP anomalies associated with hydrothermal and subsurface water flow (steaming potential) [2]. Under the influence of electric energy electrochemical processes are inevi ...
have ample time to finish.
... beneath a volcano can also be a source of hydrothermal solutions. Today pools of hot, dense brine are depositing ore minerals in sediments at the bottom of the Red Sea. Hot, mineral- laden springs are also associated with ocean- floor spreading centers, such as that found today at the East Pacific R ...
... beneath a volcano can also be a source of hydrothermal solutions. Today pools of hot, dense brine are depositing ore minerals in sediments at the bottom of the Red Sea. Hot, mineral- laden springs are also associated with ocean- floor spreading centers, such as that found today at the East Pacific R ...
Reactive-Transport Modelling Of the Native
... Enhanced Geothermal Systems (EGS) in hightemperature rock near magma bodies are under development or planned at several sites worldwide. Although there are many scientific reasons to explore this technically-challenging regime, the potential economic benefits of high enthalpy systems are an importan ...
... Enhanced Geothermal Systems (EGS) in hightemperature rock near magma bodies are under development or planned at several sites worldwide. Although there are many scientific reasons to explore this technically-challenging regime, the potential economic benefits of high enthalpy systems are an importan ...
Tracking the link between epidosites and volcanogenic massive
... Volcanogenic massive sulfide (VMS) deposits in mafic volcanic rocks are associated with extensive zones of sub-seafloor hydrothermal alteration. Published models of hydrothermal convection suggest a strict spatial relationship between VMS deposits on the seafloor and deep, underlying, high-temperatu ...
... Volcanogenic massive sulfide (VMS) deposits in mafic volcanic rocks are associated with extensive zones of sub-seafloor hydrothermal alteration. Published models of hydrothermal convection suggest a strict spatial relationship between VMS deposits on the seafloor and deep, underlying, high-temperatu ...
The Oskava block is a 15 km long and up to 4 km wide
... to 2,811 g/cm3 compared to density 2,665 g/cm3 in an ordinary granite (Chlupáčová 1990). The carbonates of dolomite-ankerite group represent evidently the older alteration stage with higher temperatures perhaps connected with breakdown of plagioclases and their albitization. According to Dobeš (1990 ...
... to 2,811 g/cm3 compared to density 2,665 g/cm3 in an ordinary granite (Chlupáčová 1990). The carbonates of dolomite-ankerite group represent evidently the older alteration stage with higher temperatures perhaps connected with breakdown of plagioclases and their albitization. According to Dobeš (1990 ...
t[^ f y'St - Oceanography ive
... Submarine hydrothermal sy stems provide all of the conditions necessary for the a biotic synthesis of organic compounds, polymers, and simpl e cell-like organisms. An analysis of the Archaean rock and fossil record shows that fossils of simple organisms ar e found in rocks deposited in hydrothermal ...
... Submarine hydrothermal sy stems provide all of the conditions necessary for the a biotic synthesis of organic compounds, polymers, and simpl e cell-like organisms. An analysis of the Archaean rock and fossil record shows that fossils of simple organisms ar e found in rocks deposited in hydrothermal ...
Alteration of the oceanic lithosphere and its implications for seafloor
... Kelley et al., 2005). The Rainbow, Logatchev and Ashadze fields are hightemperature (black smoker) systems with sulfide deposits deposited from low pH and Fe-rich fluids. Heat output of Rainbow has been estimated to be 1-5 GW (Thurnherr and Richard, 2001), making it the largest vent field yet discov ...
... Kelley et al., 2005). The Rainbow, Logatchev and Ashadze fields are hightemperature (black smoker) systems with sulfide deposits deposited from low pH and Fe-rich fluids. Heat output of Rainbow has been estimated to be 1-5 GW (Thurnherr and Richard, 2001), making it the largest vent field yet discov ...
http://geology.19thcenturyscience.org/books/1902-Geikie
... or where liable to be washed bare by heavy torrents of rain, its surface decays in a few years sufficiently to afford soil for stray plants in the crevices. ...
... or where liable to be washed bare by heavy torrents of rain, its surface decays in a few years sufficiently to afford soil for stray plants in the crevices. ...
Mineral resources 2
... • Task: read page 82 and make notes on case study 2 – important for exam! ...
... • Task: read page 82 and make notes on case study 2 – important for exam! ...
K-feldspar, feldspathoids
... • Very incompatible elements (large ions, typically) concentrated in last liquids, then in fluids • The same elements are leached from an already cooled rock (igneous intrusion or its wall-rock) • Precipitate with hydrothermal veins ...
... • Very incompatible elements (large ions, typically) concentrated in last liquids, then in fluids • The same elements are leached from an already cooled rock (igneous intrusion or its wall-rock) • Precipitate with hydrothermal veins ...
Relationships between volcanism and hydrothermal activity in the
... (Rudabanyacska and Telkibanya Au-Ag deposits and parts of the Regec caldera), formed mainly by the adularia-bearing low-sulphidation epithermal deposits, are between 13.0 and 12.2 Ma. These systems were developed within andesitic-dacitic volcanic centres with calderas and subvolcanic intrusions. In ...
... (Rudabanyacska and Telkibanya Au-Ag deposits and parts of the Regec caldera), formed mainly by the adularia-bearing low-sulphidation epithermal deposits, are between 13.0 and 12.2 Ma. These systems were developed within andesitic-dacitic volcanic centres with calderas and subvolcanic intrusions. In ...
Hydrothermal vent
A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues. Hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins, and hotspots. Hydrothermal vents exist because the earth is both geologically active and has large amounts of water on its surface and within its crust. Common land types include hot springs, fumaroles and geysers. Under the sea, hydrothermal vents may form features called black smokers. Relative to the majority of the deep sea, the areas around submarine hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fluids. Chemosynthetic bacteria and archaea form the base of the food chain, supporting diverse organisms, including giant tube worms, clams, limpets and shrimp. Active hydrothermal vents are believed to exist on Jupiter's moon Europa, and Saturn's moon Enceladus, and ancient hydrothermal vents have been speculated to exist on Mars.