Donnelly Carrier prospect (Donnelly property), Sweetwater Point, Jerseydale Mining District, East Belt, Mariposa County, California, USAi
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Latitude & Longitude (WGS84):
37° 35' 18'' North , 119° 52' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Clubs:
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Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Mariposa Gem & Mineral Club | Mariposa, California | 14km |
A Mn occurrence/prospect located in the NW¼ (probably) sec. 17, T4S, R19E, MDM, 2.1 km (6,800 feet) N of Sweetwater Point and 3.6 km (2.2 miles) NW of Jerseydale, along Sweetwater Creek (on the W bank of Sweetwater Creek 1/10 of a mile S of Donnelly Ranch house, 1 mile N of the Sweetwater gold mine), on National Forest land. Discovered in 1917. Property consisted of 4 claims. Operated by J. C. Donnelly (1942). MRDS database stated accuracy for this location is 1,000 meters.
The ore body is 0.15 meter thick. Pockets, lenses and stringers of Mn oxides occur in massive metachert (fine-grained quartzite) cut by gently-dipping quartz veins, and enclosed in sericite schist of the Calaveras series. The quartzite strikes N15W and dips 70W. The oxides include psilomelane and pyrolusite. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include surface openings comprised of 1 open cut.
No record of production and no recent activity. Material assayed about 30% Mn.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as sericite schist of the Calaveras series. |
| ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Description: Occurs as sericite schist of the Calaveras series. |
| ⓘ 'Psilomelane' |
| ⓘ Pyrolusite Formula: Mn4+O2 |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| Group 9 - Silicates | |||
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | Oxygen | |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | Manganese | |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
Other Databases
| Link to USGS MRDS: | 10031244 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry 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 ID #0060430002
