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The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes
Abstract Stratigraphic, temperature gradient, hydro
Stratigraphic, temperature gradient, hydrogeochemical, and hydrologic data have been integrated with geologic data from previous studies to show the structural configuration of the Valles caldera hydrothermal ouflow plume. Hydrologic data suggest that 25-50% of the discharge of the Valles outflow is confined to the Jemez fault zone, which predates caldera formation. Thermal gradient data from bores penetrating the plume show that shallow gradients are highest in the vicinity of the Jemez fault zone (up to 190°C/km). Shallow heat flow above the hydrothermal plume is as high as 500 mW m-2 near core hole VC-1 (Jemez fault zone) to 200 mW m-2 at Fenton Hill (Jemez Plateau). Chemical and isotopic data indicate that two source reservoirs within the caldera (Redondo Creek and Sulphur Springs reservoirs) are parents to mixed fluids flowing in the hydrothermal plume. However, isotopic data, borehole data, basic geology, and inverse relations between temperature and chloride content at major hot springs indicate that no single reservoir fluid and no single diluting fluid are involved in mixing. The Valles caldera hydrothermal plume is structurally dominated by lateral flow through a belt of vertical conduits (Jemez fault zone) that strike away from the source reservoir. Stratigraphically confined flow is present but dispersed over a wide area in relatively impermeable rocks. The Valles configuration is contrasted with the configuration of the hydrothermal plume at Roosevelt Hot Springs, which is dominated by lateral flow through a near-surface, widespread, permeable aquifer. Data from 12 other representative geothermal systems show that outflow plumes occur in a variety of magmatic and tectonic settings, have varying reservoir compositions, and have different flow characteristics. Although temperature reversals are commonly observed in wells penetrating outflow plumes, reversals are not observed in all plumes. Less information is available on the absolute age of hydrothermal outflow plumes, although the data show that they can be as old as 106 years and display episodic behavior.
s 106 years and display episodic behavior.  +
Author Fraser E. Goff  + , Lisa Shevenell  + , Jamie N. Gardner  + , Francois D. Vuataz  + , Charles O. Grigsby  +
Citation Fraser E. Goff,Lisa Shevenell,Jamie N. Gardner,Francois D. Vuataz,Charles O. Grigsby. 1988. [[The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes]]. Journal of Geophysical Research. 93(B6):6041-6058.  +
DOI 10.1029/JB093iB06p06041  +
Document type Journal Article  +
Foaf/Page http://onlinelibrary.wiley.com/doi/10.1029/JB093iB06p06041/abstract  +
Link http://onlinelibrary.wiley.com/doi/10.1029/JB093iB06p06041/abstract  +
Name The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes  +
PublicationDate 1988  +
Publisher Journal of Geophysical 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.
The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes + , The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes + , The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes + , The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes + , The Hydrothermal Outflow Plume of Valles Caldera, New Mexico, and a Comparison with Other Outflow Plumes +
Categories References , Geothermal References , Reference Materials
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.
15:22:16, 22 May 2014  +
hide properties that link here 
Fenton Hill HDR Geothermal Area + , Valles Caldera - Redondo Geothermal Area + , Valles Caldera - Sulphur Springs Geothermal Area + ReferenceForGoffShevenellGardnerVuatazGrigsby1988
Conceptual Model At Fenton Hill HDR Geothermal Area (Goff, Et Al., 1988) + , Conceptual Model At Valles Caldera - Redondo Geothermal Area (Goff, Et Al., 1988) + , Conceptual Model At Valles Caldera - Sulphur Springs Geothermal Area (Goff, Et Al., 1988) + , Observation Wells At Fenton Hill HDR Geothermal Area (Shevenell, Et Al., 1988) + Reference material
 
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