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Elliot Mine (Elliot Pegmatite deposit), Jacumba, Jacumba District, San Diego Co., California, USA

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Latitude & Longitude (WGS84): 32° 37' 35'' North , 116° 5' 10'' West
Latitude & Longitude (decimal): 32.6263888889, -116.086111111

A former silica mine located 9.7 km (6.0 miles) E of Jacumba.

Mineralization is hosted in quartz diorite.

Mineral List

1 valid mineral.

Rock Types Recorded

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Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

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Late Cretaceous - Middle Jurassic
66 - 174.1 Ma
Mesozoic granitic rocks, unit 2 (Peninsular Ranges)

Age: Mesozoic (66 - 174.1 Ma)

Stratigraphic Name: Bonsall Tonalite; Bradley Granodiorite; Cactus Quartz Monzonite; Cajalco Quartz Monzonite; Corona Hornblende Granodiorite Porphyry; Domenigoni Valley Granodiorite; Escondido Creek Leucogranodiorite; Estelle Tonalite; Fargo Canyon Diorite; Green Valley Tonalite; Home Gardens Quartz Monzonite Porphyry; Indian Mountain Leucogranodiorite; Lakeview Mountain Tonalite; Lake Wolford Leucogranodiorite; La Sierra Tonalite; Mount Hole Granodiorite; Rattlesnake Granite; Roblar Leucogranite; San Jacinto Granodiorite; Stonewall Quartz Diorite; Woodson Mountain Granodiorite

Description: Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Comments: Peninsular Ranges. Primarily tonalite, granodiorite, and minor quartz monzonite and granite. Emplacement ages mostly 80 to 105 Ma in eastern part of area and 105 to 140 Ma in western part; minor Jurassic rocks in central part

Lithology: Major:{tonalite}, Minor:{quartz diorite,granodiorite,quartz monzonite}, Incidental:{granite, pegmatite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sampson, Reid J. & W. Burling Tucker (1942), Mineral resources of Imperial County: California Journal of Mines and Geology, California Mining Bureau (Report 38): 38(2): 105-145.

Morton, P.K. (1977) Mines and mineral resources of Imperial County, California. California Division of Mines and Geology County Report 7, 104 pp.: 77.

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