Oak Hill Mine (Olsen Mine), Buzzard Point, Tuolumne County, California, USAi
| Regional Level Types | |
|---|---|
| Oak Hill Mine (Olsen Mine) | Mine |
| Buzzard Point | Point |
| Tuolumne County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 43' 17'' North , 120° 27' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chinese Camp | 126 (2011) | 16.7km |
| Snelling | 231 (2011) | 22.5km |
| Coulterville | 201 (2011) | 22.5km |
| Groveland | 601 (2011) | 23.4km |
| Jamestown | 3,433 (2011) | 25.9km |
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 | 39km |
| Mother Lode Mineral Society | Modesto, California | 49km |
A former Cu-Au-Ag mine located in sec. 30-32, T2S, R14E, MDM, 3.9 km (2.4 miles) WNW of Buzzard Point (cape & summit) and about 4 miles SE of Cooperstown (Stanislaus County), along Johnson Creek, on private land. Operated in 1901 & 1908. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is hosted in porphyry and is associated with a quartz dike on the eastern wall, 30-40 feet wide, which crops out on the surface and is traced for over 350 feet. The ore body strikes NW and dips SE at a thickness of 1.83 meters. Two ore shoots, one close to the eastern wall, the other near the western boundary. Gangue rock consists of clay shale, generally showing a foliated structure, also forming homogenous masses without and regular cleavage. Oxides carrying a fair amount of Au was found from the surface to a depth of 100 feet. Below this chalcocite and pyrite are encountered. At about 300 feet, chalcopyrite is reached. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings with a length of 792.48 meters and an overall depth of 106.68 meters. There is 1 principal shaft with 3 levels.
Production data are found in: Logan, C.A. (1928): 7.
Production information: No production recorded. Ore shipped during the frist period varied: (Au, 0.22, 0.71 and 0.62 ounces/ton; Ag, 2.38, 7.11 and 6.16 ounces/ton; Cu, 4.9, 10.5 and 20.9%).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Bornite Formula: Cu5FeS4 Description: Occurs with other sulfides in lower levels. References: |
| ⓘ Chalcocite Formula: Cu2S Description: Considerable amounts occur in the upper levels. |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
Other Databases
| Link to USGS MRDS: | 10077887 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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