Callahan prospect (Callahan deposit), Telegraph City, Foothill Copper Belt, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Callahan prospect (Callahan deposit) | Prospect |
| Telegraph City | Unincorporated Community (Former) |
| Foothill Copper Belt | Belt |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 58' 53'' North , 120° 44' 57'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Copperopolis | 3,671 (2011) | 9.4km |
| Rancho Calaveras | 4,489 (2018) | 18.8km |
| Angels Camp | 2,677 (2012) | 20.7km |
| East Oakdale | 2,762 (2011) | 22.0km |
| Valley Home | 228 (2011) | 22.2km |
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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 21km |
| Mother Lode Mineral Society | Modesto, California | 44km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 46km |
| Stockton Lapidary & Mineral Club | Stockton, California | 48km |
A Mn deposit/prospect located in sec. 34, T2N, R11E, MDM (7.5 miles SE of Milton; 0.2 mile from end of a poor road near the bottom of a canyon in gently rolling hills). Discovered in 1942. Owned by George Callahan and H.H. Donner, California (1974). MRDS database stated accuracy for this location is 1,000 meters. USGS map GP-561 shows a Mn mine in the SW¼SE¼ of the section.
Mineralization is a Mn deposit hosted in the Bear Mountain Ophiolite. The ore body strikes N and dips vertically at a width of 0.61 meter and a length of 10.67 meters. The lens of Mn ore is mainly hard, blue-black psilomelane in grey, flinty chert. The ore and chert are enclosed in meta-tuffs (?) and metavolcanics (probably of the Amador group). Some small patches of pink rhodonite occur as well. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include unspecified surface openings.
Analytical data results: Ore averages 40% Mn.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Psilomelane' |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | Silicon | |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Ca | Calcium | |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | Manganese | |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
Other Databases
| Link to USGS MRDS: | 10028640 |
|---|
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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