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

Krohn and Ward

Occurrence in Madera county in California, United States with commodities Copper, Nickel, Cobalt
Map
XML
JSON
KML
C
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. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10067587
MRDS ID W000372
Record type Site
Current site name Krohn and Ward
Related records 10285467

Geographic coordinates

Geographic coordinates: -119.86264, 37.03522 (WGS84)
Relative position ON N. SLOPE OF ADOBE HILL, 14 MI. FROM MADERA BY PAVED AND GRADED DIRT ROADS

Site location context

Political divisions (FIPS codes)

Madera(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Little Table Mountain(quadrangle 1:24,000 scale)

Shaver Lake(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle San Joaquin-Lower Chowchilla(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Madera

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010S 019E 23,26 California

Commodities

Commodity Importance
Copper Tertiary
Nickel Critical Tertiary
Cobalt Critical Tertiary

Materials information

Materials Type of material
Pyrrhotite Ore
Malachite Gangue

Host and associated rocks

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

Nearby scientific data

(1) -119.86264, 37.03522
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: AREA IS UNDERLAIN BY METAMORPHOSED JURASSIC SEDIMENTARY ROCK, WHICH CONSIST PRINCIPALLY OF FINE-GRAINED BIOTITE-QUARTZ SCHIST AND SMALL LENSES AND LAYERS OF PYROPHYLLITE SCHIST. FOLIATION IN METAMORPHIC ROCKS STRIKES N.W. AND DIPS STEEPLY E. MINERALIZATION TENDS TO LOCALIZE IN PYROPHYLLITE SCHIST, WHICH AT SHAFT, FORMS LAYER LESS THAN SEVERAL TENS OF FT. IN WIDTH. PYRRHOTITE REPORTED IN SHAFT. ARSENOPYRITE IS PRINCIPAL SULFIDE, AND A FEW OXIDIZED MINERALS, INCLUDING MALACHITE AND AZURITE, WERE FOUND.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner E. W. Krohn, Of Coarsegold, Calif. Has 80 Acre Agricultural Patent, Acquired Before 1915

Comments on the production information

  • NO PRODUCTION REPORTED

Comments on the reserve resource information

  • RESERVES UNKNOWN.

Reference information

Bibliographic references

  • Deposit

    AUBURY, L. E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 276

  • Deposit

    ERIC, J.H., 1948 ; CALIF. D.O.M. BULL. 144 , P. 262

  • Deposit

    CHESTERMAN, C.W., 1976 , WRITTEN COMMUNICATION.

  • Reserve-Resource

    UNPUBLISHED CO REPORT

General comments

Subject category Comment text
Deposit GOOD COPPER ORE AND INDICATIONS OF A DEPOSIT WAS OBSERVED IN 1908

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1972 Coury, Anny B. U.S. Geological Survey
Updater 01-OCT-1978 Fraticelli, L. A. (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.