| Deposit ID | 10087899 |
|---|---|
| MRDS ID | D010705 |
| Record type | Site |
| Current site name | Emerald Lake Mine |
| Alternate or previous names | Patented Claims: Emerald Lake Nos. 1-5, MS 14476a, Emerald Lake Mill Site, MS 14476b |
| Geographic coordinates: | -107.66897, 37.59279 (WGS84) |
|---|---|
| Elevation | 3450 |
| Relative position | 14.7 MILES S 1 W FROM SILVERTON |
Political divisions (FIPS codes)
La Plata(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Mountain View Crest(quadrangle 1:24,000 scale)
Silverton(quadrangle 1:100,000 scale)
Durango(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Animas(hydrologic unit)
Upper San Juan(hydrologic accounting unit)
San Juan(hydrologic subregion)
Upper Colorado(hydrologic region)
Federal lands
San Juan National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
Weminuche Wilderness(Wilderness)
Wilderness FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | La Plata |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| New Mexico | 039N;038N | 007W;007W | 31;05,06 | S2 OF SE (31); W2 OF NE (05); NE (06) | Colorado |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Primary |
| Copper | Secondary |
| Lead | Secondary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Calcite | Gangue |
| Quartz | Gangue |
| Result | STEVEN AND OTHERS' (1969) ASSAYS OF TWO CHIP SAMPLES FROM FACE OF UPPER ADIT SHOWED 0.01 AND 0.02 OZ/TON AU, 0.72 AND 4.12 OZ/TON AG, TRACE TO 0.02% CU, 0.21% PB, TRACE ZN. DUMP AT MIDDLE TUNNEL ASSAYED 0.04 OZ/TON AU, 2.02 OZ/TON AG, 0.06% CU. DUMP AT LOWER TUNNEL ASSAYED 0.01 OZ/TON AU, 0.27 OZ/TON AG, 0.01% CU. SEMIQUANTITATIVE SPECTROGRAPHIC ANALYSES OF THREE SAMPLES OF PYRITE-BEARING VEIN MATERIAL SHOWED 150 TO 1000 PPM TI, 20 TO 300 PPM MN, 0.7 TO 20 PPM AG, LT 200 TO 2000 PPM AS, 150 TO 300 PPM BA, LT 10 PPM BI, LT 20 PPM CD, LT 5 TO 10 PPM CR, 7 TO 30 PPM CU, LT 5 TO 30 PPM MO, 10 TO 30 PPM PB, LT 100 TO 100 PPM SB, LT 10 PPM SN, LT 100 PPM SR, 15 TO 20 PPM V, LT 50 PPM W, LT 200 PPM ZN |
|---|---|
| Result | CHEMICAL ANALYSIS SHOWED LT 0.02 TO 1.4 PPM AU, 13 TO 19 PPM CU, LT 25 TO 48 PPM PB, LT 25 TO 44 PPM ZN, 4 TO 30 PPM SB. |
| Model code | 85 |
|---|---|
| USGS model code | 22c |
| Deposit model name | Polymetallic veins |
| Mark3 model number | 46 |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Quartz Monzonite | ||||||
| |||||||
| Host or associated | Associated |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite |
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite |
| Rock unit name | Eolus Granite;Intrusive Bodies And Related Rocks (Younger And Older Bodies Of Chicago Basin Stock) |
| Rock description | Eolus Granite;Intrusive Bodies And Related Rocks (Younger And Older Bodies Of Chicago Basin Stock) |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist |
| Rock unit name | Irving Formation |
| Rock description | Irving Formation |
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| (1) | -107.66897, 37.59279 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | San Juan Uplift, San Juan Basin, San Juan Volcanic Field |
| Type of structure | Local |
| Structure description | Needle Mtns Uplift, Eolus Batholith, Chicago Basin Stock, Trimble Stock |
| Thickness | 1.83M |
|---|
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1901 |
| Discoverer | Ephraim Lissner (Claimant) |
| District name | Needle Mountain (Tacoma, Florida, Vallecito) District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | San Juan N. F. |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010705 |
SCHMITT, L.J., AND RAYMOND, W.H., 1977, GEOLOGY AND MINERAL DEPOSITS OF THE NEEDLE MOUNTAINS DISTRICT, SOUTH-WESTERN COLORADO: USGS BULL. 1434, 40 P.
STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRIMITIVE AREA, COLORADO: USGS BULL. 1261-F, P. 30-32, 55-67, 109, 166-167.
CROSS, WHITMAN, AND OTHERS, 1905, DESCRIPTION OF THE NEEDLE MOUNTAINS QUADRANGLE, COLORADO: USGS FOLIO 131.
BLM MINERAL SURVEYS 14476A&B
| Subject category | Comment text |
|---|---|
| Deposit | QUARTZ VEIN TRENDS N 40 W, 70 SW AND CONTAINS SPARSE SULFIDES AND OXIDIZED SULFIDES. DEPOSIT COULD BE REPLACEMENT TYPE IN SHEETED ZONE WITHIN METAMORPHICS, AS DESCRIBED BY CROSS AND OTHERS (1905). |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUL-1983 | Schwochow, Stephen D. | Colorado 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.