Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim), Jamestown Mine (Jamestown group), Jamestown, Jamestown Mining District, Mother Lode belt, Tuolumne County, California, USAi
| Regional Level Types | |
|---|---|
| Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim) | - not defined - |
| Jamestown Mine (Jamestown group) | - not defined - |
| Jamestown | Census-designated Place |
| Jamestown Mining District | Mining District |
| Mother Lode belt | - not defined - |
| Tuolumne County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 54' 36'' North , 120° 24' 48'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chinese Camp | 126 (2011) | 4.7km |
| Jamestown | 3,433 (2011) | 4.9km |
| Sonora | 4,818 (2017) | 8.7km |
| East Sonora | 2,266 (2011) | 8.8km |
| Tuttletown | 668 (2011) | 9.9km |
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 |
A former lode Au-Ag group of claims/mine located in the E½SE¼ sec. 27 & in the NW¼NW¼ sec. 35, T1N, R14E, MDM, 0.9 km (2,800 feet) E of Stent and approximately 4 miles S of Jamestown (on the ridge W of Kanaka Creek), on private land (private lease; fee ownership; minerals only). Owned by the Pathfinder Gold Corp. (30.00%), Nevada (1986); and by the Sonora Gold Mining Corp. (70.00%), Canada (1986) (owner-operator). MRDS database stated accuracy for this location is 5,000 meters.
Mineralization is a Au deposit. The ore body strikes N16W and dips 70NE. The Jumper Mine worked along a dike intruded between amphibolite schist walls where small veins and quartz stringers cut the 5 to 50 foot thick schistose zone. This mine is different from other mines on the Mother Lode Belt at this locality, in that no continuous ore shoots occur. The footwall of the vein is a hard altered diorite and serpentine with a diorite and diabase hanging wall. Free-milling gold ore occurs with 2% pyrite. Pocket gold was common here. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings comprised of 3 inclined shafts. The New Era shaft is 1,400 feet; the Golden Rule is 500 feet and the West vein shaft is 200 feet. There is a 400 foot deep winze at the 1,400 level on the New Era, and an 800 foot winze on a 70 degree incline at the 493 level of the Golden Rule shaft.
Mostly low-grade ore was produced.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities8 valid minerals.
Detailed Mineral List:
| ⓘ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Gold Formula: Au Localities: Jumper Mine, Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim), Jamestown Mine (Jamestown group), Jamestown, Jamestown Mining District, Mother Lode belt, Tuolumne County, California, USA Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim), Jamestown Mine (Jamestown group), Jamestown, Jamestown Mining District, Mother Lode belt, Tuolumne County, California, USA |
| ⓘ Hessite Formula: Ag2Te Description: Evidenced by California Division of Mines and Geology specimen # 13617. |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Tetradymite Formula: Bi2Te2S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Hessite | 2.BA.60 | Ag2Te |
| ⓘ | Tetradymite | 2.DC.05 | Bi2Te2S |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Quartz | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Tetradymite | Bi2Te2S |
| Ca | Calcium | |
| Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | ⓘ Pyrite | FeS2 |
| Ag | Silver | |
| Ag | ⓘ Hessite | Ag2Te |
| Te | Tellurium | |
| Te | ⓘ Hessite | Ag2Te |
| Te | ⓘ Tetradymite | Bi2Te2S |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Bi | Bismuth | |
| Bi | ⓘ Tetradymite | Bi2Te2S |
Other Databases
| Link to USGS MRDS: | 10077901 |
|---|
Localities in this Region
- California
- Tuolumne County
- Mother Lode belt
- Jamestown Mining District
- Jamestown
- Jamestown Mine (Jamestown group)
- Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim)
- Jamestown Mine (Jamestown group)
- Jamestown
- Jamestown Mining District
- Mother Lode belt
- Tuolumne County
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
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0061090196
