Mica Gem group (Mica Springs No. 1; Mica Springs claim; Little Randsburg; Madden; Jacumba No. 1; Marden), Jacumba, Jacumba District, San Diego Co., California, USA
Latitude: 32°37'60"N
Longitude: 116°7'60"W
A Mica-W mine located in sec. 25, E½ sec. 35, T17S, R8E, SBM, 5 miles NE of Jacumba.
Mineralization is hosted in granite.
References
Weber, F.H., Jr. (1963a) Mines and mineral resources of San Diego County, California. California Division of Mines and Geology County Report 3, 309 pp.: 190, 193, 277.
Lemmon, Dwight Moulton and Tweto, O.L. (1962) Tungsten in the United States, exclusive of Alaska and Hawaii. USGS Mineral Investigative Resources Map MR-25.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 427.
Mineral List
3 entries listed. 3 valid minerals.
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