Isotopic Analysis- Fluid At Valles Caldera - Sulphur Springs Geothermal Area (Musgrave, Et Al., 1989)

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Exploration Activity: Isotopic Analysis- Fluid At Valles Caldera - Sulphur Springs Geothermal Area (Musgrave, Et Al., 1989)

Exploration Activity Details
Location Valles Caldera - Sulphur Springs Geothermal Area
Exploration Technique Isotopic Analysis- Fluid
Activity Date - 1989

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
Seven water samples collected from VC-1 and VC-2A were analyzed for their major element and isotopic contents. Water sampling methods are as follows: '1) 125-mL filtered unacidified water for anions; 2) 125-mL filtered acidified water for cations; 3) a 500-mL glass bottle of unfiltered water for tritium analysis; 4) a 30-mL glass bottle of unfiltered water for stable isotope analysis; 5) a 60-mL bottle of filtered diluted (1:5) water for SiO2; 6) a 250-mL bottle of unfiltered water with 10 mL NH4OH saturated with SrCl2 added for determination of 13C-HCO3; and 7) a 250-mL bottle of unfiltered water with 5 mL of formaldehyde added for the determination of 18O-SO4' (Musgrave et al., 1989). Deuterium and 18O isotope analyses were completed by Jim Borthwick at the Stable Isotope Laboratory, Southern Methodist University, Dallas, TX. Tritium analyses were completed by H. Gote Ostlund at the Tritium Laboratory, University of Miami, FL.

 
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