Toward The Barnett Prospect

Barnett Prospect

The Barnett prospect is located on top of a precipitous ridge in the northern part of the study area
approximately 2.5 mi south of the Nancy Ann mine (fig. 2). The prospect is accessible by a foot trail from
Chicago Valley. A trench was dug in a 2-ft-thick gossan zone of dark-red to brown limonite, geothite, and remnant
galena in massive Ely Springs Dolomite. A grab sample collected from a 1-ton-stockpile of galenabearing gossan material contained 31 percent lead and 19.75 oz/ton silver. However, chip samples collected across the gossan zone contained only 0.05 to 2.6percent lead and 0.02 to 0.22 oz/ton silver.

Two pits and a 29-ft crosscut adit were found in a dark-red clay bed sandwiched between massivedolomite beds. The clay bed is as much as 6 in. thick and was traced for 80 ft along strike. Samples of the clay contained 0.15 to 7.8 percent lead and 0.02 to 0.44 oz/ton silver. Because high concentrations of silver and lead in a clay bed are unusual, it deserves further study. The bed displays no shearing or discordance to indicate that it is a fault gouge, and does not show any evidence of hydrothermal alteration. The identified silver and lead occurrences are too small to constitute a resource.

Mineral Resources of the Nopah Range Wilderness Study Area, Inyo County, California

Armstrong, Smith and Kennedy, USGS, Sabine and Mayerle, U.S. Bureau of Mines


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