Latitude: 38°39'17"N
Longitude: 122°30'3"W
A Hg mine complex located in secs. 2 & 3, T9N, R6W, MDM, about 1.7 km (5,500 feet) W of Aetna Springs.
NOTE: Coordinates provided are approximate to the center of the boundary between secs. 2 & 3.
This deposit consists of veins and veinlets of cinnabar with minor amounts of metacinnabar plus native mercury occurring in Franciscan sandstone and shale of the Great Valley sequence and serpentine. The deposits are associated with fault structures and the borders of serpentine masses. Pyrite is always a common associated mineral.
References
Becker, George F. (1888b), Geology of the quicksilver deposits of the Pacific slope: USGS Monograph 13, atlas: 354-358, 372.
Melville, William Harlow & Waldemar Lindgren (1890), Contributions to the mineralogy of the Pacific coast: USGS Bulletin 61, 40pp.: 22.
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York; Appendix 2 (1909), by Dana, E.S. and W.E. Ford: 8.
Becker, George F. (1893), Quicksilver ore deposits: Mineral Resources U.S., 1892: 148.
Hanks, Henry Garber (1905), Notes on “aragotite,” a rare California mineral: Royal Micr. Soc. Jour., 1905: 674.
Ross, Clyde Polhemus (1940b), Quicksilver deposits of the Mayacmas and Sulphur bank districts, California: USGS Bulletin 922-L: 329-353.
Yates, Robert G. & Lowell S. Hilpert (1946), Quicksilver deposits of eastern Mayacmas district, Lake and Napa Counties, California: California Division of Mines Report 42: 254-268.
Rocks & Minerals (1947): 22: 613.
Davis, Fenelon Francis (1948), Mines and mineral resources of Napa County, California: California Division Mines Report 44: 176-183.
Johnson, Fremont T. & Spangler Ricker (1949), Investigation of Oat Hill mercury mine, Napa County, California: US Bureau Mines Report of Investigation 4542: 491-498.
Dickson, F.W. & G. Tunell (1959), Stability relations of cinnabar and metacinnabar: American Mineralogist: 44: 482-483.
Davis, Fenelon Francis and E.H. Bailey (1966) Mercury. California Division Mines and Geology Bulletin 191: 247-254.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 83, 262, 265, 276.
White, D.E. (1967) Mercury and base-metal deposits with associated thermal and mineral waters. In: H.L. Barnes (Editor), Geochemistry of hydrothermal ore deposits. Holt Reinhart and Winston, New York: 594.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 65, 111 (map 3-7), 118.
Mineral List
7 entries listed. 5 valid minerals.
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