Quigg Mine (Kahl Mine [1908]), Jamestown, Jamestown District, Tuolumne County, California, USAi
| Regional Level Types | |
|---|---|
| Quigg Mine (Kahl Mine [1908]) | Mine |
| Jamestown | - not defined - |
| Jamestown District | - not defined - |
| Tuolumne County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 57' 43'' North , 120° 28' 21'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Tuttletown | 668 (2011) | 3.5km |
| Jamestown | 3,433 (2011) | 4.5km |
| Sonora | 4,818 (2017) | 8.3km |
| East Sonora | 2,266 (2011) | 9.9km |
| Columbia | 2,297 (2017) | 10.4km |
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 | 13km |
A former Cr mine located in the SE¼ sec. 6, T1N, R14E, MDM, about 3 miles WNW of Jamestown, S of French Flat (on N-facing slope of a low hill situated approximately 650 meters S of the junction of French Flat and Williamson Roads), on private land (fee ownership). Operated during the period 1908 to 1918. Owned by Karl H. Pann (100.00%), Sonora, California (1976). Operated by W. A. Fitzgerald, California - last operator (1918). MRDS database stated accuracy for this location is 10 meters.
Mineralization is hosted in Late Cretaceous-Late Jurassic dunite of the Amador Formation. The ore body is lenticular, strikes N40W and dips 80SW (largest irregular lens). The primary mode of origin was magmatic differentiation. The primary ore control was lithology and the secondary mode was igneous activity. Local wallrock alteration is intense (carbonitization). The deposit occurs in the northern part of the easternmost of 2 serpentine belts that trend NW-SE across the county. The belt is exposed over an area of 3 km by 1.5 km. Local alteration includes serpentinization of the host rock. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include surface and underground openings consisting of 1 large pit and several smaller cuts and prospects (1975).
Production data are found in: Stinson, Melvin Clarence (1975)
Total production was 1,427 metric tons of ore averaging 35%. The average mineable grade of ore (chromite) is 38.0%. Mine idle since WWI.
Analytical data results: 36.3% Cr2O3; 9.6% Fe; 39.8% Al2O3; Cr:Fe ratio 2.63:1 (U.S. Bureau of Mines alanalysis).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Formula: Fe2+Cr3+2O4 |
| ⓘ Enstatite Formula: Mg2Si2O6 |
| ⓘ 'Fayalite-Forsterite Series' |
| ⓘ Magnesiochromite Formula: MgCr2O4 Description: Occurs as subhedral crystals comprising the ore. References: |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
| ⓘ Uvarovite Formula: Ca3Cr2(SiO4)3 Description: Occurs in minor amounts. References: |
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 |
| Group 9 - Silicates | |||
| ⓘ | Uvarovite | 9.AD.25 | Ca3Cr2(SiO4)3 |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Magnesiochromite | MgCr2O4 |
| O | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
| O | ⓘ Fayalite-Forsterite Series | |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Mg | Magnesium | |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Magnesiochromite | MgCr2O4 |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Si | Silicon | |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
| Si | ⓘ Fayalite-Forsterite Series | |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Ca | Calcium | |
| Ca | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | ⓘ Magnesiochromite | MgCr2O4 |
| Cr | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Fayalite-Forsterite Series | |
Other Databases
| Link to USGS MRDS: | 10166012 |
|---|
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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