Juniper Mine, Williams Peak, Hunter Valley Mining District, West Belt, Mariposa County, California, USAi
| Regional Level Types | |
|---|---|
| Juniper Mine | Mine |
| Williams Peak | Peak |
| Hunter Valley Mining District | Mining District |
| West Belt | - not defined - |
| Mariposa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 33' 32'' North , 120° 8' 57'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Bear Valley | 125 (2011) | 2.9km |
| Catheys Valley | 825 (2011) | 14.8km |
| Coulterville | 201 (2011) | 17.4km |
| Mariposa | 2,173 (2017) | 18.1km |
| Midpines | 1,204 (2011) | 20.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Mariposa Gem & Mineral Club | Mariposa, California | 18km |
Other/historical names associated with this locality:
Juniper & Patricia Mine; Patricia & Charles Mine; Juniper claim; Independence claim; Starlight claim [Patricia]; Mountain View claim; Indepencio claim [placer]
A former Au-Ag mine located in the SW¼ sec. 19 & in the NW¼ sec. 30, T4S, R17E, MDM, 5.0 km (3.1 miles) SSE of Williams Peak and 2.9 km (9,400 feet) WSW of Bear Valley, SW of Bagby (on top of Bear Valley Mountain), on patented and unpatented land. Discovered in 1855. The property was comprised of a patented claim of 20 acres and several unpatented claims. Active in 1882. Operated during the period 1919 to 1940. Operated by Pereno C. Zirker, et al. MRDS database stated accuracy for this location is 500 meters. One of the claims was apparently renamed the Charles.
Mineralization is a vein deposit hosted in Late Jurassic greenstone. The ore body strikes NW and dips NE45-60, at a thickness of 1.52 meters. The deposit is comprised of 2 sets of veins 1 to 5 feet thick. Some vein offshoots strike NE with steeper dip than the main veins. The massive and schistose greenstone was derived from pyroxene andesite. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) and/or Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include surface and underground openings with a total length of 243.84 meters and an overall depth of 39.62 meters.
Workings on the Juniper claim include a 500 foot adit and stopes totaling 800 feet of workings. On the Starlight, or Patricia, claim there is a 320 foot deep vertical shaft with several hundred feet of drifts.
Production data are found in: Bowen & Gray (1957).
Production statistics: Year 1940: ^1.04 ounces Au/ton (312 grams/ metric ton).
The range of the ore graded from 14.4 ounces Au, 4.0 ounces Ag per ton to 0.35 ounces Au/ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10031021 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060430317
