Arid
DOI10.2172/7308985
报告编号UU-76-1-Z; PB-261549
来源IDOSTI_ID: 7308985
Petrology of the quaternary volcanics of the Roosevelt KGRA, and adjoining area, Utah. Final report, Volume 1
Nash, W.P.
英文摘要The Roosevelt KGRA (Known Geothermal Resource Aarea) located near Milford, Utah, is associated with a suite of quaternary silicic volcanics distributed for 15 km along the crest and western flank of the Mineral Mountains, a large tertiary granite batholith. The volcanics are high-silica rhyolites and occur as domes, flows and tuffs. Initial eruptions resulted in two flows of low viscosity, phenocryst-poor rhyolite. Later activity consisted of pyroclastic eruptions and the emplacement of at least 9 viscous domes. In addition to abundant glass the rhyolites contain alkali feldspar, plagioclase, biotite, iron-titanium oxides and small amounts of hornblende, allanite, apatite, zircon, sphene and topaz. Magmatic temperatures were about 700C and water fugacities ranged from 350 to 3450 bars. Based on water fugacity calculations it is concluded that there may have been one or more shallow magma chambers in the Mineral Range at depths of about 1.6 km.
出版年1976
报告类型Technical Report
语种英语
国家美国
来源学科分类15 GEOTHERMAL ENERGY ; RHYOLITES ; PETROLOGY ; UTAH ; VOLCANIC ROCKS ; VOLCANIC REGIONS ; ALBITE ; ALLANITE ; ANORTHOSITES ; APATITES ; BIOTITE ; FELDSPARS ; GLASS ; HORNBLENDE ; KGRA ; LAVA ; WATER ; ZIRCON ; ACTINIDE COMPOUNDS ; AMPHIBOLE ; GEOLOGY ; HYDROGEN COMPOUNDS ; IGNEOUS ROCKS ; MICA ; MINERALS ; NORTH AMERICA ; OXYGEN COMPOUNDS ; RADIOACTIVE MATERIALS ; RADIOACTIVE MINERALS ; ROCKS ; ROCKY MOUNTAIN REGION ; SILICATES ; SILICON COMPOUNDS ; THORIUM COMPOUNDS ; THORIUM MINERALS ; THORIUM SILICATES ; TRANSITION ELEMENT COMPOUNDS ; USA ; ZIRCONIUM COMPOUNDS ; ZIRCONIUM SILICATES Geothermal Legacy 150201* -- Geology & Hydrology of Geothermal Systems-- USA-- (-1989)
URLhttp://www.osti.gov/scitech/servlets/purl/7308985
资源类型科技报告
条目标识符http://119.78.100.177/qdio/handle/2XILL650/261604
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Nash, W.P.. Petrology of the quaternary volcanics of the Roosevelt KGRA, and adjoining area, Utah. Final report, Volume 1,1976.
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