Core Holes At Valles Caldera - Sulphur Springs Geothermal Area (Goff, Et Al., 1987)

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Exploration Activity: Core Holes At Valles Caldera - Sulphur Springs Geothermal Area (Goff, Et Al., 1987)

Exploration Activity Details
Location Valles Caldera - Sulphur Springs Geothermal Area
Exploration Technique Core Holes
Activity Date 1986 - 1986

Usefulness useful
DOE-funding Unknown

 
Exploration Basis
A series of core holes were drilled from 1984 to 1988 as a part of the Continental Scientific Drilling Program (CSDP) to better understand the stratigraphy, structure, hydrothermal alteration, and subsurface architecture of the Valles caldera. Several authors have reported results from these core holes, including Goff et al. (1986, 1987), Gardner et al. (1987, 1989), Hulen & Nielson (1985), Hulen et al. (1988, 1989), Musgrave et al. (1989), Rowley et al. (1987), Shevenell et al. (1988), and Starquist (1988).
 
Notes
CSDP core hole VC-2A was completed in 1986. Core hole VC-2A penetrates the western ring fracture zone of the caldera at Sulphur Springs reservoir, and provided considerable insight into textural features, structures, and processes governing ore and alteration mineral deposition associated with the active hydrothermal system. The well was drilled to a depth of 528 m, and encountered a narrow (5 m) zone of acid condensation that overlies vapor- and water-dominated zones separated by a region of tightly sealed rock.

 
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