| Deposit ID | 10013752 |
|---|---|
| MRDS ID | D010213 |
| Record type | Site |
| Current site name | F. M. D. Mine |
| Alternate or previous names | FMD Mine |
| Point of reference | Main Entrance |
|---|---|
| Geographic coordinates: | -105.2882, 39.68072 (WGS84) |
| Elevation | 2170 |
| Location accuracy | 25(meters) |
| Relative position | 3.9 MILES N 33 E FROM EVERGREEN. In Genesee off of hiking trail south of Foothills Drive South. Plaque with mine history on hiking trail below mine dump., Within 50-Ft Radius |
Political divisions (FIPS codes)
Jefferson(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Evergreen(quadrangle 1:24,000 scale)
Denver West(quadrangle 1:100,000 scale)
Denver(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper South Platte(hydrologic unit)
South Platte(hydrologic accounting unit)
South Platte(hydrologic subregion)
Missouri(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Colorado | Jefferson |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 004S | 071W | 25 | NW | Colorado |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Zinc Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Pyrite | Ore |
| Apatite | Gangue |
| Hematite | Gangue |
| Labradorite | Gangue |
| Limonite | Gangue |
| Magnetite | Gangue |
| Malachite | Gangue |
| Siderite | Gangue |
| Host or associated | Associated | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Quartz Monzonite | ||||||
| |||||||
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| Rock unit name | Pegmatite;Silver Plume Quartz Monzonite |
| Rock description | Pegmatite;Silver Plume Quartz Monzonite |
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Schist |
| Rock unit name | Idaho Springs Formation-Hornblende Gneiss And Amphibolite |
| Rock description | Idaho Springs Formation-Hornblende Gneiss And Amphibolite |
| Main Entrance (1) | -105.2882, 39.68072 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Floyd Hill Fault Zone, Bear Creek Shear Zone, Yankee Creek Pluton |
| Operation type | Surface-Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Malachite District |
|---|
| Ownership category | Private |
|---|
| Type of workings | Underground |
|---|---|
| Length | 106.68M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010213 |
LINDGREN, WALDEMAR, 1908, NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLO.: USGS BULL. 340, P. 157-174
SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A
LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 67-68.
| Subject category | Comment text |
|---|---|
| Deposit | ORES OCCUR IN WNW-TRENDING LAYER OF AMPHIBOLITE SCHIST COUNTRY ROCK, WITH PARALLEL FOLIATION DIPPING 75 TO 90 NE AND INTERPRETED AS METAMORPHOSED DIABASE. ROCK COMPOSED OF HORNBLENDE, BIOTITE INTIMATELY INTERGROWN WITH LABRADORITE MOSAIC, WITH ACCESSORY MAGNETITE, APATITE, PYRITE, AND CHALCOPYRITE. COARSE-GRAINED MASSES OF QUARTZ, BIOTITE, AND LABRADORITE PROBABLY REPRESENT YOUNGER DIKES TRENDING OBLIQUELY TO SCHIST FOLIATION. FRACTURES IN DIKES CONTAIN SECONDARY PYRITE AND ZINCIFEROUS SIDERITE. DEPOSIT INTERPRETED AS CHALCOPYRITE-MARMETITE-PYRRHOTITE-MAGNETITE-TYPE MAGMATIC SEGREGATION, WITH SOME POSSIBLE REPLACEMENT AND DISSEMINATIONS, ASSOCIATED WITH CA-RICH ROCKS NEAR EDGE OF PLUTON. AMPHIBOLITE AND DIKES TREND ESE TOWARD MALACHITE MINE. |
| General | Site visited inadvertently by Anna Wilson on Aug. 2, 2009. Abundant oxidized iron on dump along stream. Remains of a boiler on the north end of the dump. Remains of a caved shaft, partially covered with roofing metal, are immediately south of the boiler. Plaque along the hiking trail notes this mine never produced but it was active from 1902-1904, employed miners, and represented an investment of $80,000. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-83 | 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.