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New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits
Abstract Data collected since 1985 from test drilli
Data collected since 1985 from test drilling, fluid sampling, and geologic and geophysical investigations provide a clearer definition of the hydrothermal system in Long Valley caldera than was previously available. This information confirms the existence of high-temperature (> 200°C) reservoirs within the volcanic fill in parts of the west moat. These reservoirs contain fluids which are chemically similar to thermal fluids encountered in the central and eastern parts of the caldera. The roots of the present-day hydrothermal system (the source reservoir, principal zones of upflow, and the magmatic heat source) most likely occur within metamorphic basement rocks beneath the western part of the caldera. Geothermometer-temperature estimates for the source reservoir range from 214 to 248°C. Zones of upflow of hot water could exist beneath the plateau of moat rhyolite located west of the resurgent dome or beneath Mammoth Mountain. Lateral flow of thermal water away from such upflow zones through reservoirs in the Bishop Tuff and early rhyolite accounts for temperature reversals encountered in most existing wells. Dating of hot-spring deposits from active and inactive thermal areas confirms previous interpretations of the evolution of hydrothermal activity that suggest two periods of extensive hot-spring discharge, one peaking about 300 ka and another extending from about 40 ka to the present. The onset of hydrothermal activity around 40 ka coincides with the initiation of rhyolitic volcanism along the Mono-Inyo Craters volcanic chain that extends beneath the caldera's west moat.
t extends beneath the caldera's west moat.  +
Author Michael L. Sorey  + , Gene A. Suemnicht  + , Neil C. Sturchio  + , Gregg A. Nordquist  +
Citation Michael L. Sorey,Gene A. Suemnicht,Neil C.
Michael L. Sorey,Gene A. Suemnicht,Neil C. Sturchio,Gregg A. Nordquist. 12/1991. [[New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits]]. Journal of Volcanology and Geothermal Research. 48(3-4):229-263.
and Geothermal Research. 48(3-4):229-263.  +
Document type Journal Article  +
Foaf/Page http://www.sciencedirect.com/science/article/pii/0377027391900452  +
Link http://www.sciencedirect.com/science/article/pii/0377027391900452  +
Name New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits  +
PublicationDate December 1991  +
Publisher Journal of Volcanology and Geothermal Research  +
ReferenceGenre Geothermal  +
Has query
"Has query" is a predefined property that represents meta information (in form of a subobject) about individual queries and is provided by Semantic MediaWiki.
New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits + , New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits + , New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits + , New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits + , New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And Age Determinations Of Hot-Spring Deposits +
Categories Reference Materials , References , Geothermal References
Modification date
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
17:39:42, 7 May 2014  +
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Cation Geothermometers + , Downhole Fluid Sampling + , Exploratory Well At Long Valley Caldera Geothermal Area (Sorey, 1985) + , Groundwater Sampling + , Isotopic Analysis- Fluid + , Long Valley Caldera Geothermal Area + , Silica Geothermometers + , X-Ray Diffraction (XRD) + ReferenceForSoreySuemnichtSturchioNordquist1991
Conceptual Model At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Core Analysis At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Core Holes At Long Valley Caldera Geothermal Area (Eichelberger, Et Al., 1988) + , Core Holes At Long Valley Caldera Geothermal Area (Urban, Et Al., 1987) + , Exploratory Well At Long Valley Caldera Geothermal Area (McNitt, 1963) + , Exploratory Well At Long Valley Caldera Geothermal Area (Sorey, 1985) + , Exploratory Well At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Exploratory Well At Long Valley Caldera Geothermal Area (Suemnicht, 1987) + , Geothermometry At Long Valley Caldera Geothermal Area (Mariner & Willey, 1976) + , Geothermometry At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Isotopic Analysis- Fluid At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Isotopic Analysis- Fluid At Long Valley Caldera Geothermal Area (Taylor & Gerlach, 1983) + , Magnetotellurics At Long Valley Caldera Geothermal Area (Hermance, Et Al., 1988) + , Magnetotellurics At Long Valley Caldera Geothermal Area (Nordquist, 1987) + , Resistivity Log At Long Valley Caldera Geothermal Area (Nordquist, 1987) + , Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + , Time-Domain Electromagnetics At Long Valley Caldera Geothermal Area (Nordquist, 1987) + , Water Sampling At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) + Reference material
 
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