| Deposit ID | 10101834 |
|---|---|
| MRDS ID | D010160 |
| Record type | Site |
| Current site name | North Star Mine |
| Related records | 10191044 |
| Geographic coordinates: | -105.2978, 39.86055 (WGS84) |
|---|---|
| Elevation | 2286 |
| Relative position | 8.0 MILES N 29 DEG W FROM GOLDEN |
Political divisions (FIPS codes)
Jefferson(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Ralston Buttes(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)
| Country | State | County |
|---|---|---|
| United States | Colorado | Jefferson |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 002S | 071W | 23 | NE OF SE | Colorado |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Uranium | Tertiary |
| Lead | Tertiary |
| Zinc Critical | Tertiary |
| Silver | Tertiary |
| Materials | Type of material |
|---|---|
| Bornite | Ore |
| Chalcocite | Ore |
| Covellite | Ore |
| Malachite | Ore |
| Pitchblende | Ore |
| Uranophane | Ore |
| Result | ADAMS AND OTHERS' (1953) ANALYSES OF MINERALIZED BRECCIA FROM UNDERGROUND WORKINGS SHOWED 0.002 TO 0.850% U WITH ANOMALOUS CU OF 1.84 TO 5.74%. ALTHOUGH NO PB, ZN, OR AG MINERALS WERE OBSERVED, ANALYSES SHOWED 0.10% PB, 0.10 TO 0.38% ZN, AND TRACE TO 6.42 OZ/TON AG WITH ANOMALOUS VALUE OF 20.30 OZ/TON AG FROM DUMP SAMPLE. |
|---|
| Host or associated | Associated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||||||
| Rock unit name | Granitic Pegmatite | ||||||||
| Rock description | Granitic Pegmatite | ||||||||
| |||||||||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Gneiss |
| Rock unit name | Idaho Springs Formation-Microcline-Quartz-Plagioclase-Biotite Gneiss Unit |
| Rock description | Idaho Springs Formation-Microcline-Quartz-Plagioclase-Biotite Gneiss Unit |
| (1) | -105.2978, 39.86055 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Denver Basin |
| Type of structure | Local |
| Structure description | Rogers Fault Zone |
| Thickness | 0.3M |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1895 |
| Discoverer | Vein |
| District name | Ralston Buttes District |
|---|
| Ownership category | Private |
|---|
| Type | Owner |
|---|---|
| Owner | Brumm, A. G. |
| First year | 1967 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010160 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590018 |
ORIGINAL CRIB RECORD
| Subject category | Comment text |
|---|---|
| Deposit | DEPOSIT LIES IN NW-TRENDING SUBSIDIARY FRACTURES OF ROGERS FAULT SYSTEM IN MICROCLINE GNEISS COMPLEXLY INTERLAYERED WITH AMPHIBOLITE, HORNBLENDE GNEISS, BIOTITE GNEISS, AND PEGMATITE, ALL WITH NE STRIKE AND STEEP SE DIP. U AND CU MINERALS FOUND IN FRACTURE FILLINGS AND AS NONUNIFORMLY DISTRIBUTED CEMENTATION OF ALTERED BRECCIA FRAGMENTS. |
| Deposit | Discovery Year: 1890S |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JAN-1983 | Banke, Carl M. | Colorado Geological Survey | |
| Updater | 01-MAY-1993 | Spanski, Gregory T. | 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.