Twentynine Palms area, Riverside Co., California, USAi
| Regional Level Types | |
|---|---|
| Twentynine Palms area | Area |
| Riverside Co. | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° North , 115° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~2km
Type:
Köppen climate type:
Mindat Locality ID:
284581
Long-form identifier:
mindat:1:2:284581:7
GUID (UUID V4):
0fe3834f-a048-4493-aa74-94434febc685
This area is not a mining district per se, but rather a geographical area spanning 2 counties and containing several actual districts (Lost Horse; Gold Park; Hexie; Pinon).
Location and History: This is an extensive region in northern Riverside and southern San Bernardino Counties. It includes the gold mines just S of the town of Twentynine Palms (San Bernardino County) and the areas to the south known as the Lost Horse, Gold Park, Hexie and Pinon districts. Gold was first mined here possibly as early as 1860, but the most productive period was during the 1890's and early 1900's. There was activity here again in the 1930's, and there has been some prospecting since.
Geology and Ore Deposits: The region is underlain chiefly by quartz monzonite and gneiss, with smaller amounts of granite, diorite, and gabbro. Also there are some pegmatite and diorite dikes. The deposits consist of narrow quartz veins containing free gold, pyrite, and often abundant iron oxide. A number of small but high-grade pockets have been recovered.
Mines: Anaheim, Atlanta, Bass, Black Warrior, Desert Queen, Gold Coin, Gold Park Consolidated, Gold Point, Golden Bee, Golden Bell, Hexie (Hexahedran), Hornet, Lost Horse $350,000 (period values), and the Silver Bell.
List of minerals for each chemical element
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Merrill, Frederick James Hamilton (1919), Los Angeles, Orange and Riverside Counties: California Mining Bureau (Report 15): 15: 535-536.
Rogers, J. J. W. (1961), Igneous and metamorphic rocks of the western portion of Joshua Tree National Monument: California Division of Mines Special Report 68, 26 pp.
Tucker, W. Burling & Reid J. Sampson (1945), Mineral resources of Riverside County: California Journal of Mines and Geology, California Division of Mines (Report 41): 41(3): 127-144.
Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193: 168.
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Mojave DomainDomain
USA
- California
- San Bernardino MountainsMountain Range
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