| Deposit ID | 10103584 |
|---|---|
| MRDS ID | M032030 |
| Record type | Site |
| Current site name | Schodde Mine |
| Alternate or previous names | Lyndon Mine, Part of Comet Coalition Mines Co In 1949, NBMG Sample Site 1438 A & B |
| Related records | 10125407 |
| Geographic coordinates: | -114.59778, 37.87607 (WGS84) |
|---|---|
| Relative position | IN THE LYNDON GULCH |
Political divisions (FIPS codes)
Lincoln(county)
Nevada(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Highland Peak(quadrangle 1:24,000 scale)
Caliente(quadrangle 1:100,000 scale)
Caliente(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Dry Lake Valley(hydrologic unit)
Central Nevada Desert Basins(hydrologic accounting unit)
Central Nevada Desert Basins(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 | Lincoln |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 01S | 66E | 09,04,PROJECTED,FROM,EAST;04,PROJECTED,FROM,EAST | Nevada |
| Commodity | Importance |
|---|---|
| Silver | Primary |
| Lead | Primary |
| Zinc Critical | Secondary |
| Manganese Critical | Secondary |
| Copper | Tertiary |
| Barium-Barite Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Galena | Ore |
| Sphalerite | Ore |
| Calcite | Gangue |
| Hematite | Gangue |
| Limonite | Gangue |
| Pyrite | Gangue |
| Quartz | Gangue |
| Result | AVERAGE GRADE = 1 OZ AG/TON 1% PB 3% ZN 7-9% MN . SAMPLES 1438A AND 1438B CONTAIN, RESPECTIVELY: 15%FE, GREATER THAN 20 AND 20% CA, GREATER THAN 5000 PPM MN, 100 AND 10 PPM AG, 50 AND 100 PPM BA, 200 AND 150 PPM CD, 100 AND 70 PPM CU, 20 000 AND 500 PPM PB, 100 AND 0 PPM SB, 300 PPM SR, GREATER THAN 10 000 PPM ZN. . SAMPLES 1438A AND 1438B CONTAIN, RESPECTIVELY: 15%FE, GREATER THAN 20 AND 20% CA, GREATER THAN 5000 PPM MN, 100 AND 10 PPM AG, 50 AND 100 PPM BA, 200 AND 150 PPM CD, 100 AND 70 PPM CU, 20 000 AND 500 PPM PB, 100 AND 0 PPM SB, 300 PPM SR, GREATER THAN 10 000 PPM ZN. |
|---|
| Model code | 72 |
|---|---|
| USGS model code | 19a |
| Deposit model name | Polymetallic replacement |
| Mark3 model number | 47 |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Porphyry > Lamprophyre | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Shale |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone |
| (1) | Carbonate Shelf Sequence - Dolomite, limestone, and shale |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Highland Thrust Plate |
| Type of structure | Local |
| Structure description | Fault Limiting Ore On The East |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1882 |
| Year of first production | 1895 |
| District name | Comet Districtdistrict |
|---|
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | Charles H. Schodde |
| Type of workings | Underground |
|---|---|
| Length | 304.8M |
| Overall depth | 39.62M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M032030 |
TSCHANZ, C.M., AND PAMPEYAN, E.H., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN CO. NEVADA NEVADA BUR. OF MINES, BULL 73 P.
WESTGATE, L.G. AND KNOPF, A., 1932, GEOLOGY AND ORE DEPOSITS OF THE PIOCHE DISTRICT, NEVADA. USGS PROF. PAPER 171 P.
HILL, J.M., 1916, NOTES ON SOME MINING DISTRICTS IN EASTERN NEVADA USGS BULL 648 P.
COUCH, B.F., CARPENTER, J.A., 1943, NEVADA'S METAL AND MINERAL PRODUCTION (1859-1940, INCLUSIVE) UNIV OF NEVADA BULL 38, P. 85-89
NBMG DISTRICT FILE 166, PRESS CLIPPINGS; MINING RECORD, 1924.
BENTZ, J. AND SMITH, P., 1983, FIELD EXAMINATION REPORT, AUG 26, 1983.
TRENGOVE, R.R., 1949, USBM RI 4541.
WESTGATE AND KNOPF, 1932
| Subject category | Comment text |
|---|---|
| Deposit | WORKINGS EXPLORE A 10-15 FT THICK REPLACEMENT BED IN LIMESTONE. BEDDING IS GENERALLY HORIZONTAL WITH A SLIGHT INCLINATION OF 5-10 E. MOST ROCKS AT MINESITE ARE MEDIUM TO THICK-BEDDED, ARGILLACEOUS MARLY GREY-BROW TO YELLOWISH TAN LIMESTONES, SOME RECRYSTALLIZED AND/OR SHOWING ALGAL STRUCTURES. MASSIVE LIMESTONE CLIFFS (HIGHLAND PEAK FM) LIE SEVERAL HUNDRED FEET ABOVE THE MAIN WORKINGS, AND CHISHOLM (?)SHALE OUTCROPS 50-80 FT UPSLOPE FROM WORKINGS, INDICATING THAT MINE IS PROBABLY IN UPPER LYNDON LIMESTONE. THE EXPLORED HORIZON IS CHARACTERIZED BY LIGHT RED HEMATITE, LIMONITE, AND SPARSE MN OXIDES. THE CEILING OF THE WORKINGS CONSISTS OF MARLY ORANGE-BROWN LIMESTONE,FINELY CRYSTALLINE, WITH POCKETS OF LIMONITE, LENSES OF FE-MN OXIDES, AND RANDOM CALCITE VEINS AND VEINLETS. THE REPLACEMENT HORIZON IS DARK BROWN, MORE COARSELY CRYSTALLINE AND MARLY IN APPEARANCE. NBMG SAMPLE 1438 CONSISTS OF DARK RED-BROWN LIMESTONE OF THIS TYPE WITH IRREGULAR WHITE VUGGY CALCITE VEINS,GALENA AND PYRITE. |
| Deposit | SULFIDES ARE GENERALLY VERY FINE GRAINED. THE ROCKS ARE QUITE DENSE, POSSIBLY DUE TO FINE-GRAINED DISSEMINATED SULFIDES, OR BARITE. SOME SPECULARITE WAS NOTED ON FRACTURE SURFACES, AND ALSO SOME SILICIFICATION OF WALLROCK. EVIDENCE OF SHEARING OR BRECCIATION ALONG BEDDING PLANE FAULT IS VISIBLE WITHIN WORKINGS, INDICATING REPLACEMENT MAY HAVE BEEN PARTIALLY CONTROLLED BY THE BEDDING PLANE FAULT. OTHER FACTORS INFLUENCING MINERALIZATION, ACCORDING TO THE LITERATURE ARE THE SCODDE FISSURE (N70E) AND LAMPROPHYRE DIKES. ORE EXTENDS ALONG BEDDING 25 FT ON EACH SIDE OF FEEDING FISSURE; VERY LITTLE ORE OCCURS IN THE FISSURE ITSELF. ORE IS FAULTED OFF ON THE EAST BY A N20E FAULT. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-OCT-1979 | Harner, Joy L. (Roberts, Ralph J.) | U.S. Geological Survey | |
| Updater | 01-AUG-1984 | 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.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.