Rosecranz Mine (Rosecrans; Rose Crans), Garden Valley Area West, Greenwood District, Northwest Segment Mother Lode, El Dorado County, California, USAi
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Latitude & Longitude (WGS84):
38° 52' 23'' North , 120° 52' 15'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Georgetown | 2,367 (2011) | 4.7km |
| Coloma | 529 (2011) | 8.3km |
| Auburn Lake Trails | 3,426 (2011) | 8.4km |
| Cool | 4,100 (2017) | 12.5km |
| Cold Springs | 446 (2011) | 14.6km |
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 |
|---|---|---|
| El Dorado County Mineral and Gem Society | Placerville, California | 17km |
| Gold Country Treasure Seekers | Placerville, California | 17km |
| Roseville Rock Rollers | Roseville, California | 39km |
| Nevada County Gem & Mineral Society | Grass Valley, California | 42km |
| Fossils for Fun Society, Inc. | North Highlands, California | 48km |
Mindat Locality ID:
78154
Long-form identifier:
mindat:1:2:78154:2
GUID (UUID V4):
878222c0-4bee-47d8-a81a-b26f6f9dcd83
A former lode Au mine located in the SW¼ (estimated) or near the SE corner of sec. 21, T12N, R10E, MDM, about 3 km NW of Garden Valley (Kelsey District), on the divide between Coloma Canyon and Manhattan Creek (3 miles SW of Georgetown), on private land. The property comprises 21.63 acres. Originally worked prior to 1888. Operated by Arthur S. Morey. Some work was done on the property between 1916 and 1918. In 1936 the mine was reopened by the Lode Development Company and was active until 1939. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in slate, amphibolite and schist. The ore body strikes N and dips W. The vein is 3½ feet thick. The surface thickness of the amphibolite schist is 250 feet with Mariposa slate on both sides. The vein has little gouge and is frozen. Lies W of the Taylor vein. The ore occurs in irregular shaped bodies. Native Au and pyrite occur with the quartz, which occurs as the irregular bodies. 80% of the Au is in the native state. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings comprised of a 350 foot inclined shaft with 5 levels (100, 130, 200, 250 & 350 feet), a 165 foot crosscut. Open stopes on the 100 foot level. Work on the 100 foot level is crosscut to the adjoining Taylor vein, and on the 130 foot level in the Taylor vein, which didn't reveal ore. Hard walls permit mining without timbering.
Production data are found in: Clark, Wm. B. & D.W. Carlson (1956).
No other production record was found.
Production statistics: Year: 1888; accurate; 14 grams Au/metric ton.
Around 1888 about $21,000 (period values) of Au was produced from ore that yielded $10 (period values) per ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | 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 | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10007005 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
USA
- California
- Mother Lode BeltBelt
- Sierra NevadaMountain Range
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References
