Gold has been mined in several areas in the White Mountains in southeastern Mono County, The streams apparently were first placer-mined in the 1860s and 1870s, and lode deposits were discovered soon afterward. There has been intermittent development work and prospecting since. The principal lode mines have been the Sacramento and Twenty Grand mines. The deposits consist of gold-quartz veins with considerable sulfides in granitic rocks. Some schist and limestone crop out in the area. The placer deposits are mostly in the canyons on the west flank of the range.
Sampson, R. J., and Tucker, W. B., 1940, Mono County, gold: California Div Mines Rept. 36, pp. 120-140.