Rich Gulch is in north-central Calaveras Counry adjacent to the Mokelumne Hill district on the east and west of the West Point and Railroad Flat districts. It includes the Jesus Maria area.
Geology and Ore Deposits
The area is underlain by graphite schist, quartzite, slate and numerous limestone lenses of the Calaveras Formation (Carboniferous to Permian) that have been intruded by several small granodiorite stocks. The quartz veins usually are narrow and contain varying amounts of gold and sulfides. Much high-grade ore was recovered from shallow workings during the early days, but at depth the ore usually contains only a few dollars per ton in gold.
Blue Jay, Ilex, Quartz Glen $300,000+, Rindge No. I, No.2, No.3, Salvador.
Clark, W.B., and Lydon, P.A., 1962, Calaveras County, gold: California Div. Mines and Geology County Rept. 2, pp. 32-93.
Irelan, William, Jr., 1888, Ilex Gold Mining Company: California Min. Bur. Rept. 8, pp. 135-138.
Logan, C.A., and Franke, H., 1936, Calaveras County, Rich Gulch district: California Div. Mines Rept. 32, p. 238.
Turner, H. W., 1894, Jackson folio: U. S. Geal. Survey Geol Atlas of the U.S., folio 11, 6 pp.