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Minnie D Extension

Past Producer in Sierra county in California, 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. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10034796
MRDS ID M021713
Record type Site
Current site name Minnie D Extension

Geographic coordinates

Geographic coordinates: -120.82464, 39.47183 (WGS84)
Relative position 1 MI. W. OF ALLEGHANY

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Alleghany(quadrangle 1:24,000 scale)

Truckee(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 35 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

(1) -120.82464, 39.47183
ListMap

Economic information

Comments on the geologic information

  • 3 DISTINCT VEINS & MINOR BRANCHES & COMPLEX SYSTEM OF FAULTS OF DIFFERENT AGES. THREE ROCK TYPES. 1) A BANDED CHLORITE-AMPHIBOLITE SCHIST OF RATHER SLATY ASPECT, BELIEVED TO REPRESENT ORIGINAL WATER-LAID TUFF & SHALES, 2) AMPHIBOLITE SCHIST WITH NEEDLE HORNBLENDE XTLS, 3) MASSIVE AMPHIBOLITE PROBABLY ORIGINALLY A BASIC FLOW. 3 SYSTEMS OF PREMINERAL FISSURES. THE OLDEST HAS A NW STRIKE, DIPS NE, CONFORMING TO PRODUCTIVE FISSURES OF NEAR VICINITY. TWO PRINCIPAL VEINS STRIKE N 20 W , WITH LOW W DIP, IN PART A CONTEMPORANEOUS SYSTEM W FIRST. 3RD DIPS W AND IS LATER THAN CONTROLLING FAULTS. PARALLEL FAULTS, 10 FT. APART, NORMAL & REVERSE, THE LATTER POST MINERAL, & PROBABLY PREMINERAL OR INTERMINERAL & LIMITS SMALL ORE SHOOT. INTERMINERAL MOVEMENT GROOVES WITH PYRITE, PYRITE ON FREE WALLS W/O GOUGE, & RARE SULFIDE BANDING IN QTZ. MAJOR POST MINERAL FAULTING ALONG PREMINERAL FISSURES, PARALLEL TO VEINS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • NO OTHER PRODUCTION RECORD FOUND.

Comments on the workings information

  • 3 ADITS, SEVERAL CUTS, MORE THAN 1150 FT. OF DRIFTS & CROSSCUTS.

Reference information

Bibliographic references

  • Deposit

    FERGUSON, H. G., & GANNETT, R. W., 1932 , GOLD QTZ. VEINS OF THE ALEGHANY DISTRICT, CALIF.; USGS PROF. PAPER 172 , P. 112 , 113

  • Production

    FERGUSON, 1932

General comments

Subject category Comment text
Deposit VEINS
Deposit PART OF MORNIN GLORY PROPERTY BUT WORKED INDEPENDENTLY. ; INFO.SRC : 1 PUB LIT

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.

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.