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Rainbow 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. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10086509
MRDS ID X025375
Record type Site
Current site name Rainbow Extension
Related records 10116418

Geographic coordinates

Geographic coordinates: -120.83797, 39.46211 (WGS84)
Relative position 1/2 MI SE 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 018N 010E 03 California

Comments on the location information

  • UTM EST. NE 1/4

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • HIGH-GRADE ORE OBTAINED N OF SPLIT IN E VEIN. POSITION OF SML HIGH GRADE SHOOT IN E VEIN APPEARS DEPENDENT ON JUNCTION AND MAY EXTEND TO GREATER DEPTH.

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.83797, 39.46211
ListMap

Economic information

Comments on the geologic information

  • 2 VEINS, S EXTENSION OF 16 - TO - 1 LYING IN AMPHIBOLITE SCHIST & W BLACK SLATY CONGLOMERATE 250 FT W OF W VEIN. SML SERPENTINE MASS ALONG FOOTWALL OF S PART OF E VEIN IN UPPER ADIT & SURFACE. W VEIN, KNOWN AS TWENTY-ONE VEIN, MAY HAVE ALTERED EDGE OF SERP MASS TO GOSSAN SAME AS ON NW EXT OF CLINTON VEIN OF RAINBOW MINE; IT SHOWS CONTINUOUS QTZ TO SPIRITUALIST ADIT WHERE IT FADES TO SML POORLY DEFINED SLIP. MAIN ADIT RECOVERS THIS VEIN 250 FT W, WHERE IT IS CUT BY STEEP W DIPPING FAULT; VEIN STRIKES AVE. N 30 W, DIPS 50 - 75 NW. FAULT MAY BE CONTINUATION OF CLINTON VEIN, W FLATTER DIP & MAY ALSO BE SAME FAULT DISPLACING E VEIN. LOWER ADITS E VEIN LESS REGULAR THAN W. VEIN. S. OF E. VEIN SPLIT, THE BRANCHES GROW LESS DEFINITE. E BRANCH FOLLOWED FOR 300 FT IN MIDDLE ADIT, WHERE IT FADES INTO SML STRINGERS IN INDEFINITE HANGING WALL WHICH HERE STRIKES E OF N. UPPER ADIT PROSPECTS PROBABLE E BRANCH. NEAR PORTAL SERPENTINE FORMS FOOTWALL. TO THE S THE VEIN DIPS 40 NE, LEAVES SERPENTINE
  • CONTACT WHICH DIPS STEEPLY E & IS FOUND IN SCHIST A FEW FT E. THE SAME N FAULT THAT CUTS THE VEIN IN MIDDLE ADIT, HERE DISPLACES VEIN BUT NOT SERP CONTACT. W VEIN REGULAR, WITHOUT BENDS & SPLITS. W SCHIST WALLROCKS, THO SERP MAY LIE OVERHEAD.

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 PRODUCTION ON W VEIN. IDLE FOR SOME YEARS BEFORE 1934 . NO OTHER PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Underground
    Overall length 243.84M

Comments on the workings information

  • 4 ADITS TOTAL 800 FT. 5TH, SPIRITUALIST ADIT, OF UNKNOWN LENGTH.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit VEINS

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.