| Deposit ID | 10103880 |
|---|---|
| MRDS ID | M060228 |
| Record type | Site |
| Current site name | Portland Mine |
| Alternate or previous names | NBMG Sample Site 2821. |
| Related records | 10247272 |
| Geographic coordinates: | -118.79043, 40.43072 (WGS84) |
|---|---|
| Elevation | 1460 |
| Relative position | A HALF-MILE NORTH OF VERNON SITE IN CANYON ON EAST FLANK OF SEVEN TROUGHS RANGE. |
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)
| Country | State | County |
|---|---|---|
| United States | Nevada | Pershing |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 030N | 028E | 36 | SE OF NW | Nevada |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Lead | Tertiary |
| Zinc Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Result | SAMPLE 2821 SELECTED FROM DUMPS AND NEAR LARGE ORE BIN, AND VEIN, CONTAINS 5 % FE, 0.5 % MG, 0.1 % CA, 0.2 % TI, 200 PPM MN, 15 PPM AG, 500 PPM AS, 50 PPM B, 700 PPM BA, 1 PPM BE, 20 PPM CR, 150 PPM CU, 15 PPM MO, 7 PPM NI, 30 PPM PB, 7 PPM SC, 100 PPM SR, 100 PPM V, 15 PPM Y, 150 PPM ZR, AND 1.3 PPM AU (BY AA ANALYSIS). |
|---|
| Model code | 150 |
|---|---|
| USGS model code | 25c |
| Deposit model name | Epithermal vein, Comstock |
| Mark3 model number | 16 |
| Host or associated | Associated |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite |
| (1) | -118.79043, 40.43072 |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Seven Troughs District |
|---|
| Ownership category | BLM Administrative Area |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M060228 |
QUADE, J., 1984, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS: UNPUBLISHED NBMG (TINGLEY) FILES.
JOHNSON, M. G., 1977, GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULL. 89, P. 88.
SHAMBERGER, M. A., 1972, THE STORY OF SEVEN TROUGHS, PERSHING COUNTY, NEVADA - HISTORIC MINING CAMPS OF NEVADA, NO. 3: USGS AND NEVADA DEPARTMENT OF CONSERVATION AND NATURAL RESOURCES, NEVADA HISTORICAL PRESS, CARSON CITY.
| Subject category | Comment text |
|---|---|
| Deposit | THIS RECORD HAS BEEN MERGED WITH M242815, WHICH HAS BEEN DELETED. |
| Deposit | SAMPLE 2821 CONSISTS OF PARTLY VUGGY VOLCANIC BRECCIA, IRON-STAINED, WITH VISIBLE BUT UNIDENTIFIED SULFIDES IN THE MATRIX. ORE IS VERY QUARTZ-POOR COMPARED TO OTHER MINES OF THE DISTRICT.; MODEL NAME COULD ALSO BE: DETACHMENT FAULT-RELATED BASE- AND PRECIOUS-METALS. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-AUG-1973 | Johnson, Maureen G. | U.S. Geological Survey | |
| Updater | 01-JAN-1987 | La Pointe, D.D. (Tingley, J.V.) | Nevada Bureau of Mines and Geology | |
| Updater | 01-APR-1993 | Phinisey, J. D. (Marcus, S.) | U.S. Geological Survey | |
| Updater | 01-SEP-1993 | Humphries, S. E. (Marcus, S.) | U.S. Geological Survey | |
| Updater | 01-SEP-1994 | Li, Zhiping (Peters, S.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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