Marble Springs Mine (Compromise and Eubanks Mine; Compromise and Enbanks Mine), Jackass Mountain, Kinsley Mining District, East Belt, Mariposa County, California, USAi
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Latitude & Longitude (WGS84):
37° 43' 21'' North , 120° 1' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Greeley Hill | 915 (2011) | 9.7km |
| Coulterville | 201 (2011) | 15.4km |
| Bear Valley | 125 (2011) | 19.1km |
| El Portal | 474 (2011) | 21.7km |
| Midpines | 1,204 (2011) | 21.8km |
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 | 27km |
Mindat Locality ID:
82320
Long-form identifier:
mindat:1:2:82320:0
GUID (UUID V4):
0411bf5b-bd88-4519-940a-583bb5f00fe0
A former lode Au-Pb-Cu-Ag mine located 0.7 km (2,300 feet) S of Jackass Mountain (coordinates of record), on private (patented) land. The property consists of 2 patented claims totaling 41.3 acres. Operated during the periods 1850, 1866-1869, 1881-1885, 1898-1901, 1918-1920, 1930, 1935-1943, and 1950-1952. Operated by George B. Glenn. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in hornfels, greenstone and slate. The ore body strikes N10-15E and dips 35-47SE at a thickness of 1.52 meters. Wall rocks are chiefly massive, blue-black hornfelsic quartz-biotite rock with some interlayered greenstone and occasional slaty and quartzitic strata. Meta sediments are part of the Calaveras Group. The vein system is intersected and accompanied by a fine-grained greenish granitic dike approximating quartz-diorite. Castello (1921) describes a slate footwall & diorite hanging wall. The Compromise and Eubanks veins are segments of the same vein, from 2 to 5 feet thick, in places carrying thin seams of wall rock. Associated rocks include Late Permian diorite and granite. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings with an overall depth of 121.92 meters. The princiapl working is a 470 foot inclined shaft with 4 levels and several thousand feet of drifts plus a 130 foot drift adit. The vein was stoped discontinuously nearly 3,000 feet between surface and the 300 level. The main ore shoot was 400 feet long near the surface. Several other shoots occur, one over 100 feet long.
Production data are found in: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957).
Substantial high-grade ore was removed during the period 1866 to 1869. During the last period of production ore averaged $10.70 (period values) of Au/ton with considerable Pb and a little Cu & Ag. Much ore mined earlier ran more than $25 (period values) of Au. Incomplete records indicate total production of at least $200,000.00.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Galena Formula: PbS |
| ⓘ Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10031064 |
|---|
Other Regions, Features and Areas containing this locality
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060430383
