Caldwell Mine (Daly Mine), Granite Springs, Granite Springs Mining District, West Belt, Mariposa County, California, USAi
| Regional Level Types | |
|---|---|
| Caldwell Mine (Daly Mine) | Mine |
| Granite Springs | Group of Springs |
| Granite Springs Mining District | Mining District |
| West Belt | - not defined - |
| Mariposa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 40' 51'' North , 120° 16' 49'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Coulterville | 201 (2011) | 8.0km |
| Greeley Hill | 915 (2011) | 15.0km |
| Groveland | 601 (2011) | 18.0km |
| Bear Valley | 125 (2011) | 18.9km |
| Snelling | 231 (2011) | 22.7km |
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 |
|---|---|---|
| Mariposa Gem & Mineral Club | Mariposa, California | 35km |
| Calaveras Gem & Mineral Society | Angels Camp, California | 49km |
Mindat Locality ID:
82052
Long-form identifier:
mindat:1:2:82052:2
GUID (UUID V4):
ba25e65f-da17-4a9d-bc5b-53a9d54986e2
A former Mn mine located in the SE¼SE¼ sec. 11 & in the NE¼NE¼ sec. 14, T3S, R15E, MDM, 2.6 km (8,600 feet) SSE of Granite Springs (town), on private (patented) land. Discovered in 1917. Property consists of patented agricultual land. Owned by Robert D. Dunn (1974). Operated by Walter Hixson, California (1974). MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is an Mn deposit hosted in chert. The ore body strikes N12E and dips 65E. The chert is enclosed in metatuff and metavolcanics. The Mn is associated with the chert as a series of lenses enclosed in the chert. The thick-bedded to massive red chert, thin-bedded buff to gray chert, and massive to thick-bedded white chert is enclosed in gray to green metatuff and metavolcanics of the Amador group. The ore is partly psilomelane, but is mainly brown, gray or rose-colored cherty manganiferous calcium carbonate (manganocalcite). Pyrolusite is also present. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include surface and underground openings comprised of an inclined shaft 57 feet deep with a 26 foot drift at its bottom, a 10 foot deep shaft, a 15 foot shaft plus 30 open cuts scattered along the ore zone for a distance of more than 1,000 feet.
Operated during WWI as the Daly Mine, producing between 100-200 tons of ore which averaged 45% Mn, 6% Fe, and 13% silica. Reactivated about 1937 and operated until 1943. Total production has been about 265 tons of ore averaging nearly 45% Mn.
Ore running at least 20% Mn remained in the mine in 1942.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Bementite Formula: Mn7Si6O15(OH)8 References: |
| ⓘ Calcite Formula: CaCO3 Description: 20% to 30% Mn. |
| ⓘ Calcite var. Manganese-bearing Calcite Formula: (Ca,Mn)CO3 Description: 20% to 30% Mn. |
| ⓘ Hausmannite Formula: Mn2+Mn3+2O4 References: |
| ⓘ Piemontite Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) Description: Occurs as grains in ore. References: |
| ⓘ 'Psilomelane' |
| ⓘ Pyrolusite Formula: Mn4+O2 References: |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] References: |
| ⓘ Tephroite Formula: Mn2+2SiO4 Description: Occurs as micro-crystals of plumose material. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hausmannite | 4.BB.10 | Mn2+Mn3+2O4 |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | var. Manganese-bearing Calcite | 5.AB.05 | (Ca,Mn)CO3 |
| Group 9 - Silicates | |||
| ⓘ | Tephroite | 9.AC.05 | Mn2+2SiO4 |
| ⓘ | Piemontite | 9.BG.05a | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| ⓘ | Bementite | 9.EE.05 | Mn7Si6O15(OH)8 |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Bementite | Mn7Si6O15(OH)8 |
| H | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| O | Oxygen | |
| O | ⓘ Bementite | Mn7Si6O15(OH)8 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Hausmannite | Mn2+Mn23+O4 |
| O | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| O | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| O | ⓘ Tephroite | Mn22+SiO4 |
| Al | Aluminium | |
| Al | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Si | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | ⓘ Tephroite | Mn22+SiO4 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| Ca | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | Manganese | |
| Mn | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Mn | ⓘ Hausmannite | Mn2+Mn23+O4 |
| Mn | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| Mn | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | ⓘ Tephroite | Mn22+SiO4 |
Other Databases
| Link to USGS MRDS: | 10188131 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
USA
- California
- Mother Lode BeltBelt
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060430001
