C. E. Hedge
D. E. White
B. R. Doe
1966
<p><span>A radiogenic tracer study has been made of </span>lead<span> and </span>strontium<span> </span>in<span> </span>deep<span> </span>geothermal<span> </span>brines<span>, salt from </span>brine<span>, and the upper Quaternary rhyolite domes near the </span>Salton<span> </span>Sea<span> </span>in<span> the Imperial Valley, California. The data on the </span>brines<span> and rhyolite glasses are compared to those from Quaternary Colorado River and Tertiary sediments of the </span>area<span>. The </span>brines<span> sampled contain '-'100 ppm Pb, sufficient for consideration as a possible ore-forming fluid. The isotopic data indicate that 80-100 percent of the </span>strontium<span> and 50-100 percent of the </span>lead<span> </span>in<span> these </span>brines<span> were acquired from the associated sediments. The isotopic compositions of </span>lead<span> and </span>strontium<span> </span>in<span> the Quaternary rhyolite glasses are distinctly different from those of the sediments and </span>brines<span>. The </span>strontium<span> data suggest that the rhyolite glasses were derived from basaltic or gabbroic material but may have attained as much as 40 percent of their </span>strontium<span> from upper crustal rocks such as the sediments analyzed. </span></p>
application/pdf
10.2113/gsecongeo.61.3.462
en
Society of Economic Geologists
Preliminary investigation of the source of lead and strontium in deep geothermal brines underlying the Salton Sea geothermal area
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