| Deposit ID | 10214765 |
|---|---|
| MAS/MILS ID | 0080190009 |
| Record type | Site |
| Current site name | Eva Mines complex |
| Alternate or previous names | New Boston, Mineral Chief, Moline, Michelle, Muscovite, Spartan, Mark One Venture, Kelly Tunnel |
| Point of reference | Main Entrance |
|---|---|
| Geographic coordinates: | -105.69869, 39.71469 (WGS84) |
| Elevation | 2627 |
| Location accuracy | 100(meters) |
Political divisions (FIPS codes)
Clear Creek(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Georgetown(quadrangle 1:24,000 scale)
Denver West(quadrangle 1:100,000 scale)
Denver(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Clear(hydrologic unit)
South Platte(hydrologic accounting unit)
South Platte(hydrologic subregion)
Missouri(hydrologic region)
Federal lands
LG(Federal land areas administered by LG)
| Country | State | County |
|---|---|---|
| United States | Colorado | Clear Creek |
| Commodity | Importance |
|---|---|
| Lead | Primary |
| Silver | Secondary |
| Zinc Critical | Secondary |
| Gold | Secondary |
| Materials | Type of material |
|---|---|
| Galena | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Biotite | Gangue |
| Feldspar | Gangue |
| Goethite | Gangue |
| Kaolin | Gangue |
| Limonite | Gangue |
| Muscovite | Gangue |
| Quartz | Gangue |
| Siderite | Gangue |
| Gold | Trace |
| Model code | 85 |
|---|---|
| USGS model code | 22c |
| Deposit model name | Polymetallic veins |
| Mark3 model number | 46 |
| Main Entrance (1) | -105.69869, 39.71469 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | vein intersections are favorable, increasing depth is not |
| Thickness | 3M | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 450M | ||||||||||||||||||||||||||||||||||
| Width | 500M | ||||||||||||||||||||||||||||||||||
| Area | 10HA | ||||||||||||||||||||||||||||||||||
| Depth to top | 1M | ||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | No |
| Year of first production | 1976 |
| District name | Georgetown-Silver Plume District |
|---|
| Type of mineral rights | Patented |
|---|---|
| Type of mineral rights | Located Claim |
| Type of mineral rights | Private Lease |
| Ownership category | Mixed |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Mark One Ventures |
| Interest | 100 |
| Home office | Colorado |
| Year | 1976 |
| Type | Operator |
|---|---|
| Owner | Raymond P Heon |
| Home office | Colorado |
| Year | 1974 |
| Type of workings | Underground | ||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 2400M | ||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080190009 |
CLARK, T.A.,1975, ORE RESERVE ESTIMATION IN VEIN DEPOSITS:
UNPUBLISHED SENIOR REPORT, COLO. SCH. MINES 17P.
Spurr, J. E., Garrey, G. H., and Ball, S. H., 1908, Economic geology of the Georgetown quadrangle, Colorado: U.S. Geological Survey Professional Paper 63, 422 p.
REF:COLO DIV.OF MINES,A SUMMARY OFMINERAL ACTIVITIES IN COLO
Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.
| Subject category | Comment text |
|---|---|
| Deposit | MARK 1 VENTURES GEORGETOWN COLORADO JUNE 1976 ENVIROMENTAL: THE MIXED DOMAIN INCLUDES NATIONAL FOREST,PRI AND MUNCIPAL LAND. THE PROPORTY IS ALSO VERY CLOSE TO INTE 70. THE LAND AND AESTHETIC SENSITIVITY IS DUE TO THE PROXI I-70 DEPOSIT: THE ORE IS FOUND IN PARALLEL FRACTURES WITH 60 TO SEPARATION,ABOUT 10% OF THE LENGTH OF THE FRACTURES IS ECO ALLY MINERALIZED. THE SURFACE OF THE DEPOSIT IS OXIDIZED A GENERALLY COVERED WITH SOIL AND SCREE BENEFICIATION: ORE BENEFICIATION IS DONE IN BLACKHAWK, C A FEE BASIS - BOODLE MILL 50 STD TPP THE MENDOTA PROPERTY ADJOING THE PRESENT RAND IS REPORTEDLY OPTION THE DIP OF THE ORE ZONES IS VERTICAL TO PLUS OR MINUS 80 DE THE OPENINGS ARE SUBJECT TO AIR SLACK PRODUCTION IS 5 STD TONS PER MANSHIFT, DILUTION RUNS 10-15 TRUCKING FROM THE MINE TO THE MILL COSTS $5 PER STD TON UN ING COST IS $25 STD TON, WITH MILLING COSTS AT $22 PER STD EMPLOYEES: 20-25 AT $6 HR MINER AND $5.50 HR FOR HELPERS. T ECONOMIC THE PB CONC MUST ASSAY GREATER THAN 50% PB AND THE CONC MUST ASSAY GREATER THAN 55%. COST ESTIMATES THOUSAND DOLLARS 000 OMITTED JUNE 1976 ACQUISITION COST 3000 PURCHASE PRICE EXPLORATION 60 DRIFTING (EST. 1000 FT DEVELOPEMENT MINE 200 TO DATE ESTIMATE MILL 0 LEASE EQUIPMENT MINE 200 FROM EQUIP LIST WORKING CAPITAL 125 90 DAY OPERATING COSTS TOTAL 3585 ESTIMATED INCOME PER TONNE ORE: ORE VALUE 76.5 JUNE 19 MINING (27.5) MILLING (24.25) HAULAGE (5.75) SMELTER (6.00) NON-PAY AND NON-RECOVER (23.00) 30% EST NET PER TONNE (10.00) LOSS MINIMUM ORE VALUE REQUIRED FOR PROFIT IS $86.50 PER TONNE AT 100 TPP MINIMUM ORE VALUE REQUIRE TO RETURN 10% ON INVES IS $103 PER TONNE |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 13-MAY-1985 | Colorado School Of Mines | U.S. Bureau of Mines | |
| Updater | 12-APR-2006 | Beach, Richard A. | 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.