1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Brush Creek

Past Producer in Sierra county in California, United States with commodity Gold
Map
XML
JSON
KML
B
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. Materials information
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10034760
MRDS ID M021657
Record type Site
Current site name Brush Creek
Alternate or previous names Ante Up
Related records 10117060

Geographic coordinates

Geographic coordinates: -120.88964, 39.5121 (WGS84)
Elevation 1372
Relative position 4 MI SW OF DOWNIEVILLE

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Goodyears Bar(quadrangle 1:24,000 scale)

Portola(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019N 010E 17,18,19,20,29,30 California

Comments on the location information

  • UTM EST. ADIT SHOWN IN SEC 17.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • 3 SMALL BUNCHES OF HIGH GRADE ORE. SMALL SHOOT OF HIGH GRADE ORE; WHERE QTZ-CARBONATE-MARIPOSITE MIX. ORE YIELDED $8.50/TON. IN SHOOT ON 2ND LEVEL, A VEINLET OF DENSE BLUISH QTZ CROSSING WHITE COARSE QTZ REPORTED TO CARRY MUCH COARSE GOLD. OLD LENTICULAR QTZ BODY SAID TO BE EXTREMELY RICH.

Materials information

Materials Type of material
Gold Ore
Quartz Gangue
Talc Gangue

Analytical data

Result GOLD HAS AVE FINENESS OF 811 PARTS PER 1000.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -120.88964, 39.5121
ListMap

Economic information

Ore body information

  • General form PINCH & SWELL
    Strike N
    Dip 53 W
    Thickness 6.1M

Comments on the geologic information

  • TO 20 FT THICK BANDED QTZ VEIN MOSTLY W/I SLATE, 43-65 W DIP, SOMETIMES FOLLOWS SERPENTINE CONTACT. SERPENTINE INTENSELY ALTERED TO CARBONATE-MARIPOSITE MIXTURE, FORMS FOOTWALL IN PLACES. POST MINERAL ANDESITE HANGING WALL & DIKE WHICH IN ONE PLACE CROSSES VEIN & INTRUDES SERPENTINE. IN MOST PLACES A STRIP OF CRUSHED SLATE IS BETWEEN DIKE & VEIN. A WELLMARKED FOOTWALL SLIP SEPERATES VEIN QTZ FROM ALTERED SERPENTINE, NEAR AMERICAN TUNNEL PORTAL. ELSE WHERE 50 FT THICK ALTERED SERPENTINE CUT BY GOUGE-BEARING SLIPS, AGAINST FRESH SERPENTINE WHICH DIPS WESTWARD. ELSEWHERE QTZ IS IN STRINGERS, OR BANDED, IN ALTERED & UNALTERED SLATE. A MILE NORTH A QTZ VEIN STRIKES N 20 W AND DIPS FROM STEEP TO FLAT TO W, DUE TO SURFACE SLIDING POSSIBLY, AND AT SURFACE IS 6 - 8 FT THICK, HERE W VERT DIP. THIS VEIN LIES BETWEEN CHLORITIC SCHIST & SERPENTINE TO EAST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes

Mining district

District name Downieville

Comments on the production information

  • APPARENTLY IDLE FROM 1875 - 1923 , FROM 1923 - 27 . A FEW THOUSAND DOLLARS WAS PRODUCED. NO OTHER PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Surface/Underground
    Area 42.494HA

Comments on the workings information

  • ORIGINAL INCLINED SHAFT OF 520 FT. W SHORT LEVELS, CAVED. RECENT ADIT 2200 FT. CONNECTS W OLD SHAFT, 220 FT. DEEP WINZE. OTHER ADITS, SURFACE WORKS.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit VEINS, ORE SHOOTS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Hayden, F. (Albers, J.) U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site

Authoritative California resources

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