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Bartholomew-Simms Lease Mine, Negro Jack Hill, Lowell Hill Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Bartholomew-Simms Lease Mine | Mine |
| Negro Jack Hill | Hill |
| Lowell Hill Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 16' 15'' North , 120° 46' 41'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Alta | 610 (2011) | 7.7km |
| Dutch Flat | 160 (2011) | 8.8km |
| Washington | 185 (2011) | 10.0km |
| Nevada City | 3,152 (2017) | 20.7km |
| Colfax | 2,005 (2017) | 24.2km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 25km |
A Cr occurrence/mine located in the NE¼ sec. 7, T16N, R11E, MDM, 0.7 km (0.4 mile) NNW of Negro Jack Hill coordinates of record), along the E canyon wall of Steephollow Creek, on National Forest land. Owned by the Swedish-American Bank (1918- ). Operated by E. I. Bartholomew and William Simms, lessees. MRDS database stated accuracy for this location is 500 meters.
This Cr deposit appeared to be a single ore body dipping about 60E. The ore, about 2 feet wide, was exposed in the backs and floors of both adits for their entire length. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include underground openings comprised of 2 adits, one at 18 feet and the other at 20 feet long.
About 15 long tons of development ore had been mined by September, 1918, but none had been shipped. It was estimated that the deposit should yield 100 to 200 long tons of ore but no shipments were recorded and it is possible that the ore may still remain on the property.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10092461 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker 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 #0060570786
