| Deposit ID | 10046480 |
|---|---|
| MRDS ID | M241647 |
| Record type | Site |
| Current site name | Open Pit Pennsylvania Mine |
| Alternate or previous names | Tom Johnston Property In Part, Part of Alta Claims, Jumbo Claim Area? |
| Related records | 10310471 |
| Geographic coordinates: | -114.47555, 37.41358 (WGS84) |
|---|---|
| Elevation | 1753 |
Political divisions (FIPS codes)
Lincoln(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Ella Mountain(quadrangle 1:24,000 scale)
Clover Mountains(quadrangle 1:100,000 scale)
Caliente(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Meadow Valley Wash(hydrologic unit)
Lower Colorado-Lake Mead(hydrologic accounting unit)
Lower Colorado-Lake Mead(hydrologic subregion)
Lower Colorado(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 | Lincoln |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 006S | 067E | Nevada |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Copper | Primary |
| Barium-Barite Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Brochantite | Ore |
| Chalcopyrite | Ore |
| Gold | Ore |
| Malachite | Ore |
| Calcite | Gangue |
| Clay | Gangue |
| Pyrite | Gangue |
| Quartz | Gangue |
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Host or associated | Associated |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock |
| Rock unit name | Prospect Mountain Quartzite;Pioche Shale |
| Rock description | Prospect Mountain Quartzite;Pioche Shale |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
| (1) | -114.47555, 37.41358 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Caliente Caldron Complex |
| Type of structure | Local |
| Structure description | Ne-And Nw- Striking Faults. |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| District name | Pennsylvania District |
|---|
| Ownership category | BLM Administrative Area |
|---|
| Type | Owner |
|---|---|
| Owner | Westward Energy And Resources, Inc. |
| First year | 1983 |
| Type | In-situ | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1969 | |||||||||||||||||||||
| Total resources | 453000mt ore | |||||||||||||||||||||
| ||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M241647 |
BENTZ, J. AND SMITH, P., 1983, FIELD EXAMINATION REPORT ON SEPT 13,1983.
TSCHANZ AND PAMPEYAN, 1970, NBMG BULL 73, P. 170-172, PL. I., II.
NBMG DISTRICT FILES, REPORT ON TOM JOHNSON PROPERTY
GRAPEVINE SPRING G-E-M RESOURCES AREA TECHNICAL REPORT, 1983. FOR BLM
NBMG DISTRICT FILES, UNPUB. REPORT ON TOM JOHNSTON PROPERTY
| Subject category | Comment text |
|---|---|
| Deposit | AREA OF SHEETED QUARTZ VEINS AND QUARTZ-CEMENTED BRECCIA WHICH WAS EMPLACED ALONG ASHEAR ZONE. INTERVENING WALLROCK FRAGMENTS AND LENSES CONSIST OF ALTERED ANDESITE, MAPPED AS MIOCENE ASH-FLOW TUFF. ROCKS ARE HIGHLY ALTERED; FELDSPARS ALTERED TO CLAY. THERE ARE SOME FRAGMENTS OF CONGLOMERATE OR FINE-GRAINED CLASTIC ROCK ALSO. FRAGMENTS OF QUARTZ VEIN, RECEMENTED BY WHITE QUARTZ WERE ALSO OBSERVED, INDICATING MULTIPLE VEINING AND BRECCIATION. THE QUARTZ IN OUTCROP IS LIGHT GREEN TO TAN TO GREY IN COLOR, SUGARY TO MASSIVE IN TEXTURE AND CHARACTERISTICALLY VUGGY WITH SOME GOSSANY PORTIONS. THE VUGS ARE FILLED WITH EUHEDRAL PRISMATIC QUARTZ WHICH IS HIGHLY IRON-STAINED. FISSURE-TYPE BANDING IS COMMON AS IS QUARTZ AFTER CALCITE TEXTURES. SOME COARSE WHITE CALCITE VEIN IS ALSO PRESENT. THE REMNANT MOST ROCK IS THOROUGHLY KAOLINIZED AND SILICIFIED. MOST OF THE VEINS ARE SUBPARALLEL WITH A GENERAL N-NW STRIKE AND SHALLOW E-NE DIP. THE OUTCROP IS SHEARED (FRACTURED) BOTH PARALLEL TO AND AT A |
| Deposit | HIGH ANGLE TO THE SHEETED VEIN SYSTEM. THE DOMINANT NW SHEARING AND VEINING REFLECTS A MAJOR NE-STRIKING 30E-DIPPING FAULT WHICH BOUNDS THE INFERRED SOUTHERN LIMIT OF THE CALIENTE CALDRON COMPLEX. SO |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1984 | La Pointe, D.D. (Tingley, J.V.) | Nevada Bureau of Mines and Geology |
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.