| Deposit ID | 10101836 |
|---|---|
| MRDS ID | D010178 |
| Record type | Site |
| Current site name | Big Bertha Mine |
| Related records | 10166982 |
| Geographic coordinates: | -105.21836, 39.33944 (WGS84) |
|---|---|
| Elevation | 2280 |
| Relative position | 20.9 MILES S 16 E FROM EVERGREEN |
Political divisions (FIPS codes)
Jefferson(county)
Colorado(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Deckers(quadrangle 1:24,000 scale)
Bailey(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)
Federal lands
Pike and San Isabel National Forests(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Colorado | Jefferson |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 008S | 070W | 22 | SW OF NW | Colorado |
| Commodity | Importance |
|---|---|
| Feldspar | Primary |
| Quartz | Primary |
| Thorium | Secondary |
| REE Critical | Secondary |
| Materials | Type of material |
|---|---|
| Allanite | Ore |
| Xenotime | Ore |
| Fluorite | Gangue |
| Gadolinite | Gangue |
| Monazite | Gangue |
| Thorite | Gangue |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||||
| Rock unit name | Pegmatite;Pikes Peak Granite | ||||
| Rock description | Pegmatite;Pikes Peak Granite | ||||
| |||||
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite |
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Pegmatite |
| Rock unit name | Pegmatite;Pikes Peak Granite |
| Rock description | Pegmatite;Pikes Peak Granite |
| (1) | Rocks of Pikes Peak Batholith (1000-m.y. age group) |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Front Range Uplift, Pikes Peak Batholith |
| Type of structure | Local |
| Structure description | Kennedy Gulch Fault Zone |
| General form | IRREGULAR |
|---|---|
| Length | 85.34M |
| Width | 44.2M |
| Development status | Past Producer |
|---|---|
| Commodity type | Both |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1947 |
| Year of last production | 1953 |
| District name | South Platte Pegmatite District |
|---|
| Ownership category | National Forest |
|---|
| Type | Owner-Operator |
|---|---|
| Owner | Consolidated Feldspar Corp. |
| Home office | Denver, Co. |
| First year | 1953 |
| Type of workings | Unknown |
|---|---|
| Length | 99.06M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | D010178 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0080590035 |
PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.
COLORADO DIV. MINES ANNUAL OPERATORS REPTS.
MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 27.
| Subject category | Comment text |
|---|---|
| Deposit | IRREGULAR PEGMATITE CONSISTS OF QUARTZ-MICROCLINE-BIOTITE WALL ZONE, INTERMEDIATE ZONE OF BIOTITE, AND CORE OF QUARTZ AND MICROCLINE. CHARACTERIZED BY HUGE MASSES OF ALLANITE; MINOR REPLACEMENT OF FLUORITE BY XENOTIME. PRODUCTION OF FELDSPAR CAME APPARENTLY FROM CORE AS TYPICAL INTERMEDIATE ZONE OF PERTHITE NOT DEVELOPED HERE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-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.