| Deposit ID | 10310393 |
|---|---|
| MRDS ID | W002895 |
| Record type | Site |
| Current site name | Seven Troughs Project |
| Alternate or previous names | Mazuma Hills Mine, Kindergarten, Coalition Mine, Badger Mine |
| Related records | 10222355, 60001651 |
| Geographic coordinates: | -118.77377, 40.44072 (WGS84) |
|---|---|
| Elevation | 1520 |
| Relative position | The Seven Troughs Project is located about 30 miles northwest of Lovelock, Nevada. |
Political divisions (FIPS codes)
Pershing(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Seven Troughs(quadrangle 1:24,000 scale)
Lovelock(quadrangle 1:100,000 scale)
Lovelock(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Granite Springs Valley(hydrologic unit)
Truckee(hydrologic accounting unit)
Central Lahontan(hydrologic subregion)
Great Basin(hydrologic region)
Federal lands
Bureau of Land Management(Bureau of Land Management NV)
Bureau of Land Management NV BLM(Type of land area)
BLM(Federal land areas administered by BLM)
| Country | State | County |
|---|---|---|
| United States | Nevada | Pershing |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 030N | 028E | 12, 13, 23 24 25 26 35 36 | Nevada | |
| Mount Diablo | 030N | 029E | 07 19 | Nevada |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Secondary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Electrum | Ore |
| Quartz | Gangue |
| Model code | 150 |
|---|---|
| USGS model code | 25c |
| Deposit model name | Epithermal vein, Comstock |
| Mark3 model number | 16 |
| Host or associated | Host | ||
|---|---|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock > Slate | ||
| |||
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Granodiorite | ||
| |||
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite | ||
| |||
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite | ||
| |||
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt | ||
| |||
| (1) | -118.77377, 40.44072 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | fissure, breccia zone |
| General form | tabular to irregular |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Medium |
| Significant | Yes |
| Discovery year | 1905 |
| Year of first production | 1907 |
| Production years | 1907-1955 |
| District name | Seven Troughs District |
|---|
| Ownership category | Private |
|---|---|
| Ownership category | BLM Administrative Area |
| Type | Owner |
|---|---|
| Owner | Newmont Gold Corp |
| Year | 2006 |
| Type | Operator |
|---|---|
| Owner | Victoria Resource Corporation |
| Year | 2006 |
Ransome, F, 1909, Geology and Ore Deposits of Goldfield, Nev.: USGS Prof. Paper 66, P. 16-25
Hill, J. M., 1912, Mining Districts of the Western U.S.: USGS Bull. 507, p. 214
Stuart, E., 1909, Nevada's Mineral Resources, Carson City, P. 121-2
Lincoln, F. C., 1923, Mining Dist. of Nev.: Reno, Nev. Newsletter Pub.
Quincy Gold Corp. press release, 4/13/05.
NBMG MI-2004.
| Subject category | Comment text |
|---|---|
| Deposit | Most of the district mineralization is covered by post-mineral volcanics; the auriferous volcanic-hosted quartz-adularia veins were mined where exposed. Free gold occurs in quartz and breccia; some silver is alloyed with gold. The district is underlain by mid-Miocene-age basalt and rhyolite which have been cut by northerly, northwesterly and northeasterly structures which form a complex zone of horst and graben blocks. An area approximately 5 miles long and 2.5 miles wide has been variably altered by shallow level hydrothermal solutions within which gold and silver mineralization is hosted in banded quartz veins as well as in sheared gouge zones. The historical mining exploited spotty but very high-grade orebodies primarily in two areas at the Coalition and Fairview mines. Quincy?s Seven Troughs program was designed to test the strike and dip extensions of the bonanza gold veins, and drill holes to explore the down-dropped block between the Coalition Mine and the Badger Mine. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-NOV-2006 | LaPointe, D.D. | Nevada Bureau of Mines and Geology | |
| Editor | 01-SEP-2007 | Schruben, Paul G. | U.S. Geological Survey | Converted from S&A FileMaker format to Oracle. Edit checks on rocks, units, and ages with Geolex search, and other fields. |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.