Grade-tonnage model of hot-spring gold-silver; a supplement to U.S. Geological Survey Bulletin 1693

Geologic datasets for weights-of-evidence analysis in northeast Washington: 2. Mineral databases

“…Date that original data was extracted from the USGS MRDS and MAS/MILS databases. (Berger, 1992;Briskey, 1992;Mosier, Sato, Page, Singer, and Berger, 1992; 11. Production size --Qualifier of quantity of ore produced 18.…”

Mineral resource potential and geology of Coronado National Forest, southeastern Arizona and southwestern New Mexico

“…The hot-springs gold-silver deposit tonnage model (Berger and Singer, 1992) does not represent the tonnages of deposits of this type in the Forest. It includes deposits having reserves as large as 240 million tonnes of ore, whereas total production from hot springs gold-silver deposits in the Forest is roughly 0.0028 tonnes of gold from roughly 300 tonnes of ore (Arizona Geological Survey, 1989).…”

“…It includes deposits having reserves as large as 240 million tonnes of ore, whereas total production from hot springs gold-silver deposits in the Forest is roughly 0.0028 tonnes of gold from roughly 300 tonnes of ore (Arizona Geological Survey, 1989). The three smallest deposits, deposits of 0.32, 1.0, and 4.2 million tonnes, in the hot-springs gold-silver model (Berger and Singer, 1992) were used to estimate the tonnages and grades of these deposits in the Forest.…”

“…Estimated tonnages of metals in undiscovered hot-springs gold-silver deposits. Only the four smallest deposits in the C&S grade and tonnage model of hot-springs gold-silver deposits (Berger and Singer, 1992) were used in the adjusted tonnage (AT) estimates. Three of these deposits have tonnages approximately two orders of magnitude larger than any of the deposits in Coronado National Forest.…”

Additional mineral resources assessment of the Battle Creek, Bruneau River, Deep Creek-Owyhee River, Jarbidge River, Juniper Creek, Little Owyhee River, North Fork Owyhee River, Owyhee River Canyon, South Fork Owyhee River, Upper Deep Creek, and Yatahoney Creek Wilderness Study Areas, Owyhee County, Idaho

“…The results of these studies have been published in a series of U.S. Geological Survey Bulletins (Ach and others, 1986;Foord and others, 1987;Goeldner and others, 1986;Lawrence and others, 1988;Minor and others, 1986;Sawlan and others, 1987). Since that time, low-grade, high-tonnage epithermal hot-spring gold-silver deposits of the type defined by Berger (1985; and Berger and Singer (1987) have been recognized in the region north of the wilderness study areas (Rytuba, 1989). The recognition that this mineral-deposit model is applicable in the region, coupled with new data that has become available to the U.S. Geological Survey (R.J. Shepard, FMC Gold Company, written commun., 1989; E.J., Demeter, Bond Gold Corp., written commun., 1989), reinterpretation of existing geochemical data (Bennett, 1976;Erickson and others, 1986;Erickson and others, 1988a, b), and known-deposit data (Buehler and Capstick, 1985;Capstick, 1986;Capstick, and Buehler, 1985;Gabby, 1985;Graham, 1985;Leszcykowski, 1986a;1986b;Mayerle, and Gabby, 1986;Moyle, and Buehler, 1987;Winters, 1985) suggest that similar deposits may be present elsewhere on the Owyhee Plateau.…”