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  3. Mineral Resource Data System (MRDS)

Pennsylvania Mountain Placers

Past Producer in Park county in Colorado, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10091015
MRDS ID DC00278
Record type Site
Current site name Pennsylvania Mountain Placers
Alternate or previous names Bulger Basin Mine, Bullger Basin Placer, Penn Placer

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
Centroid -106.13406, 39.28159 (WGS84) Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.
(click for info)
-106.1181, 39.2661 (WGS84) 100 SE 1/4 SEC.16 SE 1/4 SEC 17

Site location context

Political divisions (FIPS codes)

Park(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Climax(quadrangle 1:24,000 scale)

Leadville(quadrangle 1:100,000 scale)

Leadville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Platte Headwaters(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)

Geographic areas

Country State County
United States Colorado Park

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 09S 78W 08,09,16,17 Colorado

Comments on the location information

  • Pits are on the east flank of Pennsylvania Mountain at 12,200 feet elevation, about 3 miles SW of Alma, in the SW/4 sec 16 and SE/4 sec 17, T 9 S, R 78 W.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • The gold is about 0.74 to 0.75 fine.

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

Centroid (1) -106.13406, 39.28159
ListMap
(2) -106.1181, 39.2661
ListMap

Economic information

Comments on the geologic information

  • The gold shows virtually no rounding, and some still has quartz attached, indicating that it is an eluvial placer accumulation.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Alma District

Comments on the production information

  • Placer is well known for coarse gold found there. The largest nugget, found in 1938, weighed 11.12 oz. About 32 oz. were produced from 1935 to 1937.
  • Reported production from 1961 to 1974 was about 710 oz. of gold. (1974, Sunshine files)
  • A lack of water nearby has hampered mining operations.

Reference information

Bibliographic references

  • Deposit

    DEL RIO, 1961, MIN. RES. OF COLO.

  • Deposit

    CONSV. DIV. COMP. DATE, 9,64

  • Deposit

    Parker, B. H., Jr., 1961, The geology of the gold placers of Colorado: Golden, CO, Colorado School of Mines, Ph.D. dissertation, 578 p.

  • Deposit

    Singewald, Q. D., 1950, Gold placers and their geologic environment in northwestern Park County, Colorado: U.S. Geological Survey Bulletin 955-D, p. 103-172.

  • Deposit

    Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.

  • Deposit

    MESA METAL-NONMETAL MINE FILE REF

  • Deposit

    OWNER-OP: FAIRPLAY MINING COMPANY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-72 Conservation Division Files U.S. Geological Survey
Updater 03-FEB-06 Beach, Richard A. Colorado Geological Survey
Reporter 31-DEC-96 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.