Dairy Farm Mine (Trent; Vantrent Mine), Kilaga Springs, Wheatland Mining District, Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Dairy Farm Mine (Trent; Vantrent Mine) | Mine |
| Kilaga Springs | Group of Springs |
| Wheatland Mining District | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 1' 51'' North , 121° 17' 17'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sheridan | 1,238 (2011) | 9.5km |
| Beale Air Force Base | 1,319 (2011) | 10.4km |
| Wheatland | 3,725 (2017) | 11.9km |
| Lincoln | 46,474 (2017) | 15.5km |
| Smartsville | 177 (2016) | 19.7km |
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 | 29km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 29km |
| Roseville Rock Rollers | Roseville, California | 31km |
| Fossils for Fun Society, Inc. | North Highlands, California | 39km |
| Sacramento Valley Detecting Buffs | North Highlands, California | 39km |
A former Cu-Au-Ag occurrence/mine located in sec. 27, T14N, R6E, MDM, 7.5 km (4.7 miles) NNW of Kilaga Springs and 9.4 km (5.8 miles) NE of Sheridan, on private (patented) land. The property comprises 160 acres. Operated during the periods 1922, 1904 to 1905, 1918, and 1933 to 1935. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a replacement deposit hosted in amphibolite schist, and porphyry. The ore body is lenticular, strikes N2W and dips 60E and is 18.29 meters wide and has a depth-to-top of 25.91 meters. The footwall is porphyry and the hanging wall is amphibolite schist. The ore occurs as lenses 10 to 60 feet wide. The deposit is capped by gossan, which was worked for Au & Ag content. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include surface and underground openings with a length of 2,008.63 meters and an overall depth of 179.83 meters. They were comprised of a 3-compartment, inclined shaft 590 feet deep, with 1,000 feet of drifts, cuts and raises on each level. The open cut is 600 feet long and 30 feet wide at the bottom. The shrinkage system of mining was employed. A cement copper plant was built here in 1960.
production information: Yield varied greatly: Au at $1.25 to $4.00 (period values) ton; Ag at a few cents to $1.70 (period values) per ton; and Cu at 1% to 15%. No production values are available.
Analytical data results: Sulfides averaged 3% Cu.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ 'Limonite' Description: Auriferous. Mined late for the Au content. |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10032007 |
|---|
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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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060610020
(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaupp.208-209
Dairy Farm Mine, Kilaga Springs, Wheatland Mining District, Placer County, California, USA