| Deposit ID | 10013747 |
|---|---|
| MRDS ID | D010208 |
| MAS/MILS ID | 0080590119 |
| Record type | Site |
| Current site name | Malachite Mine |
| Alternate or previous names | Claims: Malachite, Morrison |
| Geographic coordinates: | -105.26447, 39.67777 (WGS84) |
|---|---|
| Elevation | 2231 |
| Relative position | 4.2 MILES N 45 E FROM EVERGREEN. Location not reliable or verified. |
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 | 070W | 30 | N2 | Colorado |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Silver | Primary |
| Gold | Primary |
| Zinc Critical | Secondary |
| Lead | Tertiary |
| Nickel Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Galena | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Tenorite | Ore |
| Apatite | Gangue |
| Augite | Gangue |
| Labradorite | Gangue |
| Result | AVERAGE SMELTER ASSAYS RAN 3.31% CU, 3.43% ZN, 0.90 OZ/TON AG, 0.06 OZ/TON AU. SIX SAMPLES FROM OUTCROP GOSSAN ASSAYED TRACE TO 0.04 OZ/TON AU AND 0.4 TO 0.8 OZ/TON AG (MOREHOUSE, 1950). |
|---|
| 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 > Amphibole Schist |
| Rock unit name | Idaho Springs Formation---Hornblende Gneiss And Amphibolite;Idaho Springs Formation---Feldspar-Rich Gneiss |
| Rock description | Idaho Springs Formation---Hornblende Gneiss And Amphibolite;Idaho Springs Formation---Feldspar-Rich Gneiss |
| (1) | -105.26447, 39.67777 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Bear Creek Shear Zone, Floyd Hill Fault Zone |
| General form | LENTICULAR, TABULAR, PIPE, PINCH AND SWELL |
|---|---|
| Thickness | 12.19M |
| Length | 792.48M |
| Depth to bottom | 45.72M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1866 |
| Discoverer | R.G. Morrison And J.L. Wilson (Claimants) |
| Year of first production | 1888 |
| District name | Malachite District |
|---|
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | Frobex Ltd. |
| Home office | Toronto |
| First year | 1964 |
| Type | Owner |
|---|---|
| Owner | Colorado Kansas Syndicate |
| Home office | Idledale, Co. |
| First year | 1964 |
| Type of workings | Surface/Underground |
|---|---|
| Length | 463.3M |
| Overall depth | 39.62M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010208 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590119 |
SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A.
HEILAND, C.A., AND OTHERS, 1945, GEOPHYSICAL SURVEYS AT THE MALACHITE MINE, JEFFERSON COUNTY, COLORADO: AIME TECH. PUB. 1947.
HUFF, L.C., 1963, COMPARISON OF GEOLOGICAL, GEOPHYSICAL, AND GEOCHEMICAL PROSPECTING METHODS AT THE MALACHITE MINE, JEFFERSON COUNTY, COLORADO: USGS BULL. 1098-C.
LINDGREN, WALDEMAR, 1908, NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLO.: USGS BULL. 340, P. 157-174.
MOREHOUSE, G.E., 1950, GEOLOGY OF THE MALACHITE MINE, JEFFERSON COUNTY, COLORADO: COLORADO SCHOOL OF MINES M.SC. THESIS T-675.
LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 64, 68.
MOREHOUSE (1950)
"MINERAL RESOURCES OF COLO." MINE MAP REPO # 403134 [copied from deleted record 10142442]
| Subject category | Comment text |
|---|---|
| Deposit | INTERLAYERED BIOTITE-AMPHIBOLITE SCHIST AND HORNBLENDE GNEISS TREND GENERALLY EAST-WEST WITH STEEP SW AND NE FOLIATION DIP. LAYERS ARE CUT BY SWARM OF GENERALLY N 30 TO 55 E TRENDING PEGMATITES. WEST ORE BODY IS AVERAGE 40-FT-DIAM PIPELIKE BODY PLUNGING STEEPLY NW. EAST ORE BODY IS 40-FT-WIDE TABULAR BODY WITH EAST-WEST STRIKE AND SOUTH DIP. ORE IS COARSE-GRAINED MASSES OF CHALCOPYRITE, SPHALERITE, AND PYRRHOTITE AND LIES IN LENTICULAR, TABULAR, AND PINCH-AND-SWELL SEGREGATIONS AND SOME REPLACEMENTS IN METAMORPHOSED GABBRO (AS INTERPRETED BY LOVERING AND GODDARD, 1950), ALTHOUGH SYNGENETIC MAGMATIC ORIGIN NOT CONCLUSIVELY ESTABLISHED. HUFF (1963) FOUND ORE TO FILL FRACTURES AND INTERSTICES OF ANGULAR COUNTRY ROCK FRAGMENTS AND, ON BASIS OF FAULT CONTROL AND RELATIVELY NARROW GEOCHEMICAL ANOMALY, BELIEVED DEPOSIT TO BE HYDROTHERMAL VEIN. LARAMIDE AGE COULD THEN BE INTERPRETED ON BASIS OF POSSIBLE RELATION OF FAULT TO NW-TRENDING BRECCIA REEF NEARBY. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1983 | Schwochow, Stephen D. | Colorado Geological Survey | |
| Reporter | 17-NOV-1983 | Intermountain Field Operations Center (IFOC) | U.S. Bureau of Mines | |
| Editor | 03-AUG-2009 | Wilson, Anna B. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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