Shafer lease occurrence (Pereira Mine [1918]), Ziehlke claims group [1948] (Last Chance claim; Morning Glory claim; Murphy lease; Pereira property; C. M. Quigg lease on Pereira property [1918]; C and M Quigg lease), Peoria Flat, Yosemite Junction, Tuolumne County, California, USAi
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Latitude & Longitude (WGS84):
37° 54' 7'' North , 120° 29' 40'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chinese Camp | 126 (2011) | 6.4km |
| Jamestown | 3,433 (2011) | 8.5km |
| Tuttletown | 668 (2011) | 10.4km |
| Sonora | 4,818 (2017) | 13.4km |
| East Sonora | 2,266 (2011) | 14.4km |
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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 19km |
A former Cr mine located in sec. 36, T1N, R13E, MDM, 0.2 km (800 feet) SE of Peoria Flat (coordinates of record) and about 4 miles NW of Chinese Camp (on flat valley floor a short distance N of Table Mountain), on private land. Owned by Rosasco. MRDS database accuracy for this location is not stated.
Mineralization is hosted in Late Jurassic dunite. The ore body is lenticular, strikes NW and dips 90 at a width of 1.52 meters and a length of 12.19 meters. Local alteration involved the serpentinization of the host rock. The deposit occurs in the northern part of the westernmost of 2 serpentine belts which trend NW-SE across the county. The belt is exposed over an area 30 km by 6 km. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include surface and underground openings comprised of a flooded shaft and an open cut approximately 30 feet long, 6 feet deep and 5 to 6 feet wide.
Production data are found in: Cater, F.W., Jr. (1948a).
Analytical data results: 23.6% Cr2O3 - U.S. Bureau of Mines (1918).
A few hundred tons of milling ore remain on the lease.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Formula: Fe2+Cr3+2O4 |
| ⓘ Magnesiochromite Formula: MgCr2O4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite ? | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Magnesiochromite | 4.BB.05 | MgCr2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Magnesiochromite | MgCr2O4 |
| Mg | Magnesium | |
| Mg | ⓘ Magnesiochromite | MgCr2O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | ⓘ Magnesiochromite | MgCr2O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10043708 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
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