“An artesian well flowing about 40 l/min of 29 C water occurs roughly 1 km upstream of the abandoned mining community of Bolivia on a slender terrace on the northeast side of Cottonwood Canyon. The water deposits copious amounts of Fe-oxides near the casing of the wellhead before flowing into Cottonwood Creek. No free gas is observed discharging from the well water. Rocks in adjacent cliffs consist of highly altered Jurassic gabbro and limestone. The well was drilled as a geothermal gradient hole by a previous geothermal exploration group and is apparently indicative of a localized geothermal anomaly in this sector of the Stillwater Range (S. Johnson, personal communication, 1997).

Water from this well contains low concentrations of SiO2, As, B, Br, and Li but has a Cl content of 290 ppm. The water does not resemble Dixie production fluids and displays little, if any, oxygen-18 shift due to high-temperature isotopic exchange. The water contains 0.10 T.U. tritium yielding a minimum age of about 75 y. The subsurface equilibration temperature based on the chemical geothermometers is estimated at <45 C (Goff et al., 2002, Table 12).” (Blackwell et al., 2006 (in review))