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Isotopic Analysis- Rock At Coso Geothermal Area (1997)
ExpActivityDate 1997  +
ExplorationBasis Determine a major lithospheric boundary  +
ExplorationOutcome useful  +
ExplorationTechnique Isotopic Analysis- Rock +
Notes Sr and Nd isotope ratios of Miocene-Recent
Sr and Nd isotope ratios of Miocene-Recent basalts in eastern California, when screened for crustal contamination, vary dramatically and indicate the presence of a major lithospheric boundary that is not obvious from surface geology. Isotope ratios from the Coso field form a bull's-eye pattern with very low <sup>87</sup>Sr/<sup>86</sup>Sr (0.7033) centered just south of the geothermal area. The boundary between enriched (high <sup>87</sup>Sr/<sup>86</sup>Sr) and depleted (low <sup>87</sup>Sr/<sup>86</sup>Sr) domains is sharply defined in the Coso Range and coincides with the northeastern boundary of recent seismic activity.
stern boundary of recent seismic activity.  +
OpenEI/PageDescription Isotopic Analysis- Rock At Coso Geothermal Area (1997): geothermal exploration activity.  +
OpenEI/PageKeyword Geothermal  + , Coso Geothermal Area  + , Isotopic Analysis- Rock  +
Place Coso Geothermal Area +
Reference material A major lithospheric boundary in eastern California defined by isotope ratios in Cenozoic basalts from the Coso Range and surrounding areas +
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Isotopic Analysis- Rock At Coso Geothermal Area (1997) + , Isotopic Analysis- Rock At Coso Geothermal Area (1997) +
Categories Exploration Activities , Geothermal
Modification date
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05:11:43, 7 September 2012  +
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