Chemical Analyses of Geothermal Waters and Strategic Petroleum Reserve Brines for Strategic and Precious Metals

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Water form seven hydrothermal-geothermal, one geopressured-geothermal, and six Strategic Petroleum Reserve wells have been surveyed for twelve metals of special strategic and economic importance using trace chemical analysis techniques. The elements sought were Cr, Co, Mn, Ta, Sn, V, Nb, Li, Sr, Pt, Au, and Ag. Platinum was found at a concentration of ~50 ppb in a brine from the Salton Sea geothermal area. Brine from this region, as has been known from previous studies, is also rich in Li, Sr, and Mn. Higher concentrations (~900) of Sr are found in the high-salinity geopressured brines. None of the fluids contained ... continued below

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Harrar, Jackson E. & Raber, Ellen June 1, 1983.

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Water form seven hydrothermal-geothermal, one geopressured-geothermal, and six Strategic Petroleum Reserve wells have been surveyed for twelve metals of special strategic and economic importance using trace chemical analysis techniques. The elements sought were Cr, Co, Mn, Ta, Sn, V, Nb, Li, Sr, Pt, Au, and Ag. Platinum was found at a concentration of ~50 ppb in a brine from the Salton Sea geothermal area. Brine from this region, as has been known from previous studies, is also rich in Li, Sr, and Mn. Higher concentrations (~900) of Sr are found in the high-salinity geopressured brines. None of the fluids contained interesting concentrations of the other metals. Good recovery of precious metals at sub-ppm concentrations from synthetic high salinity brines was achieved using Amborane resin, but similar recovery in the laboratory using real brines could not be demonstrated. Several analytical techniques were compared in sensitivity for the determination of the precious metals; neutron activation analysis with carrier separation is the best for gold and platinum in geothermal brines. (DJE-2005)

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  • Report No.: UCRL-88575, Rev. 1
  • Grant Number: None
  • DOI: 10.2172/860876 | External Link
  • Office of Scientific & Technical Information Report Number: 860876
  • Archival Resource Key: ark:/67531/metadc782121

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  • June 1, 1983

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  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 22, 2016, 10:21 p.m.

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Harrar, Jackson E. & Raber, Ellen. Chemical Analyses of Geothermal Waters and Strategic Petroleum Reserve Brines for Strategic and Precious Metals, report, June 1, 1983; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc782121/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.