Conceptual Model At Valles Caldera - Sulphur Springs Geothermal Area (Goff, Et Al., 1988)

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Exploration Activity: Conceptual Model At Valles Caldera - Sulphur Springs Geothermal Area (Goff, Et Al., 1988)

Exploration Activity Details
Location Valles Caldera - Sulphur Springs Geothermal Area
Exploration Technique Conceptual Model
Activity Date 1988 - 1988
Usefulness useful
DOE-funding Unknown

Exploration Basis
This review integrates data from VC-1 and from select geothermal test wells of the Fenton Hill Hot Dry Rock and Baca Geothermal projects in order to construct a comprehensive hydrologic and temperature gradient model of the hydrothermal outflow plume issuing from the western margin of the Valles caldera.
Stratigraphic, temperature gradient, hydrogeochemical, hydrologic, and geologic data from 10 geothermal test wells and several hot springs were integrated to model the Valles caldera hydrothermal outflow plume. Hydrochemical data from aquifers sampled in the VC-1 core hole confirmed the existence of the outflow plume. Combination of this data with previous datasets showed that the outflow at Valles is complex, and is fed by at least two major fluid reservoirs (Redondo Creek and Sulphur Springs areas). Discharge rates, thermal gradients, relative heat flow estimates, and mixing relationships suggest that 25-50% of the lateral flow occurs along vertical conduits associated with the Jemez fault zone, with subordinate flow occuring in horizontal, semipermeable Paleozoic strata overlying Precambrian crystalline basement rocks. Paleozoic strata are nonhomogenous in their lithology and so function as poorly connected zones of lateral flow, such that there is no single unique thermal aquifer outside of the western margin of the caldera.


Additional References