| Deposit ID | 10045087 |
|---|---|
| MRDS ID | M232747 |
| Record type | Site |
| Current site name | Pacific Mine |
| Alternate or previous names | Pacific Tunnel |
| Geographic coordinates: | -117.26068, 41.14656 (WGS84) |
|---|---|
| Elevation | 1682 |
| Relative position | 39 MILES NE OF WINNEMUCCA |
Political divisions (FIPS codes)
Humboldt(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Adam Peak(quadrangle 1:24,000 scale)
Osgood Mountains(quadrangle 1:100,000 scale)
McDermitt(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Middle Humboldt(hydrologic unit)
Humboldt(hydrologic accounting unit)
Black Rock Desert-Humboldt(hydrologic subregion)
Great Basin(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Nevada | Humboldt |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 038N | 042E | 29 | NE OF NE | Nevada |
| Commodity | Importance |
|---|---|
| Tungsten Critical | Primary |
| Materials | Type of material |
|---|---|
| Scheelite | Ore |
| Calcite | Gangue |
| Diopside | Gangue |
| Wollastonite | Gangue |
| Result | 0.2% TO 0.5% WO3, SOME 1% WO3 ORE |
|---|
| Model code | 42 |
|---|---|
| USGS model code | 14a |
| Deposit model name | W skarn |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||
| Rock unit name | Osgood Mtns. Stock | ||||||
| Rock description | Osgood Mtns. Stock | ||||||
| |||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Hornfels |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| Rock unit name | Preble Formation;Preble Formation |
| Rock description | Preble Formation;Preble Formation |
| (1) | -117.26068, 41.14656 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | N-S Trending Fault |
| Type of structure | Local |
| Structure description | Faulting |
| General form | TABULAR |
|---|---|
| Strike | N15W |
| Dip | 40E |
| Length | 167.64M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Medium |
| Significant | No |
| Year of first production | 1952 |
| District name | Potosi District |
|---|
| Ownership category | Private |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Getchell Mine, Inc. |
| Year | 1955 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1952-1955 | ||||||||||||||
| Material | ORE | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| Description | Cp_Grade: ^Ave. 0.3% Wo3 | ||||||||||||||
| |||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M232747 |
WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT COUNTY, NEV; NEV. BUREAU OF MINES BULL. 59.
HOBBS, S.W., AND CLABAUGH, S.E., 194L, TUNGSTEN DEPOSITS OF THE OSGOOD RANGE, HUMBOLDT CO., NEV. U. NEV. BULL, VOL. 40, NO. 5, GEOL. & MIN. SER. NO. 44.
STAGER, H. K., IN PREPARATION, NBMG BULLETIN ON TUNGSTEN DEPOSITS OF NEVADA.
NBMG STAFF, 1985, NBMG OFR 85-3
HOTZ, P.E. AND WILLDEN, R., 1964; STAGER, IN PREP.
| Subject category | Comment text |
|---|---|
| Deposit | THE LIMESTONE-GRANODIORITE CONTACT CROSSES THE PACIFIC PROPERTY IN AN IRREGULAR N-S LINE WITH THE GRANODIORITE DIP-PING BENEATH THE LIMESTONE AT AN ANGLE OF ABOUT 60E. TACTITE C-ROPS OUT ALONG THE HILL SURFACE IN LENTICULAR,TABULAR BODIES, -SEPARATED BY AREAS IN WHICH EXPOSURES ARE POOR AND TACTITE PRO-BABLY THIN OR ABSENT. THE TACTITE IS WIDEST AND HIGHEST GRADE -IN STEEPLY-PLUNGING TROUGH-LIKE STRUCTURES FORMED AT RE-ENTRAN-TS IN THE CONTACT. ONLY A SMALL FRACTION OF THE TACTITE CONTAI-NS MORE THAN 0.5 % W03 AND MUCH OF IT CONTAINS LESS THAN 0.2 %-. A CURVED BAND OF TACTITE ABOUT 375 FT FROM THE NORTH EDGE OF- THE PROPERTY, INCLUDED A LAYER OF GARNET-RICH MATERIAL FROM 3-TO 5 FT THICK THAT AVERAGED ABOUT 1.0 % W03 FOR A LENGTH OF 10-0 FT. AN ADIT CALLED THE PACIFIC TUNNEL, DRIVEN WEST FROM THE- BASE OF THE HILL PASSES THROUGH ABOUT 600 FT OF CRUSHED ROCK -IN THE GETCHELL FAULT ZONE BEFORE ENTERING SOLID LIMESTONE. AF-TER PASSING THROUGH AN ADDITIONAL 100 FT OF LIMESTONE, THE ADI-T |
| Deposit | CUTS THE GRANODIORITE CONTACT AT ABOUT 450 FT BELOW THE OUTC-ROP. TACTITE ABOUT 2 FT THICK AND CONTAINING SPARSE SCHEELITE -WAS INTERSECTED AT THE CONTACT. DRIFTING ALONG THE CONTACT TO -THE NORTH OF THE ADIT INTERSECTED SCHEELITE-BEARING ORE OF MIN-ABLE GRADE AND THICKNESS THAT WAS MINED BY SHRINKAGE STOPES UP- TO THE BOTTOM OF THE OPEN PIT. |
| Deposit | BOTH OPEN-PIT AND UNDERGROUND MINE, ALTHOUGH PIT ACCOUNTED FOR LARGEST PART OF THE PRODUCTION. TACTITE BODY WAS MINED DOWN DIP APPROX 550 FT IN UNDERGROUND WORKINGS AND OPEN PIT. THE PROPERTY IS ESTIMATED TO HAVE REMAINING RESERVES OF ABOUT 64,000 TONS OR AT 0.33% WO3 ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1981 | La Pointe, D.D. | Nevada Bureau of Mines and Geology | |
| Updater | 01-MAR-1986 | La Pointe, D.D. (Tingley, J.V.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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