Morning Star Mine [1], Estelle Mine (Troeger's tunnel), Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USAi
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Latitude & Longitude (WGS84):
36° 31' 29'' North , 117° 47' 39'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Lone Pine | 2,035 (2015) | 25.8km |
| Olancha | 192 (2015) | 33.1km |
| Independence | 669 (2011) | 47.6km |
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 |
|---|---|---|
| Lone Pine Gem & Mineral Society | Lone Pine, California | 26km |
A former Au-Cu-Ag-Pb-Zn mine located in sec. 24, T16S, R38E, MDM, 1.5 km (0.9 mile) S of Cerro Gordo (townsite) and 1.8 km (1.1 miles) E of the Estelle Mine (4,600 feet S of the Cerro Gordo shaft). MRDS database stated accuracy for this location is 10 meters.
Mineralization is a vein deposit hosted in Late Devonian limestone. The ore body strikes N30W and dips 70W at a thickness of 3.05 meters and a length of 21.34 meters. The ore bodies occur in limestone and marble from the Cerro Gordo Formation. The formation has a thickness of 1,500 feet, outcrops continuously from the Cerro Gordo Mine to a point S of the Morning Star workings, where the White Pine shale Formation of Mississippian age overlies it. Gold ore bodies are found along bedding in the limestone, strike N50W and dip 45SW. The vein filling is iron. The Pb-Zn ore bodies were iron-stained siliceous ore carrying values in Ag. Local rocks include Carboniferous marine rocks, unit 3 (SE California Clastic Assemblage).
Workings include underground openings with a length of 1,950.72 meters. Two tunnels with the upper tunnel at an elevation of 7,972 feet, was driven E 1,530 feet. The lower tunnel, at an elevation of 7,754 feet, was driven E 930 feet. The two tunnels connected by a winze with sub-levels. The stope is 70 feet in length and the thickness varies from 3 to 10 feet.
Production data are found in: Tucker, W. Burling & Reid J. Sampson (1938): 439.
6,000 tons of ore were reportedly mined with a gross value of $150,000 (period values). Gold ore assayed 0.8 ounces/ton Au, 30.67 ounceston Ag, 5.55% Pb and 25.7% Fe.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Linarite Formula: PbCu(SO4)(OH)2 References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: Specimen Label by Bob Griffis MineralsIdentification: Visual Identification, Dealer/Collection Label |
| ⓘ Native Gold Formula: Au |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Linarite | 7.BC.65 | PbCu(SO4)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Linarite | PbCu(SO4)(OH)2 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Linarite | PbCu(SO4)(OH)2 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| S | Sulfur | |
| S | ⓘ Linarite | PbCu(SO4)(OH)2 |
| Cu | Copper | |
| Cu | ⓘ Linarite | PbCu(SO4)(OH)2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Linarite | PbCu(SO4)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10076659 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Antler Foreland BasinBasin
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060270213
Morning Star Mine [1], Estelle Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts, Inyo County, California, USA