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

Hirz Mountain

Past Producer in Shasta county in California, United States with commodities Iron, Copper
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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10103522
MRDS ID M024296
Record type Site
Current site name Hirz Mountain
Alternate or previous names Jennings Group
Related records 10165305

Geographic coordinates

Geographic coordinates: -122.24359, 40.90235 (WGS84)
Elevation 457
Relative position WEST OF MCCLOUD RIVER 23 MILES NORTH-NORTHEAST OF REDDING

Site location context

Political divisions (FIPS codes)

Shasta(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bollibokka Mountain(quadrangle 1:24,000 scale)

Redding(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

McCloud(hydrologic unit)

Upper Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Shasta-Trinity 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 Shasta

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 035N 003W 07,08 California

Comments on the location information

  • UTM EST. LAND STATUS VALUE CALCULATED 7-94 USING GIS OVERLAY ANALYSIS WITH USFS LAND OWNERSHIP BOUNDARIES, 1:126,720 SCALE.

Commodities

Commodity Importance
Iron Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Hematite Ore
Magnetite Ore
Epidote Gangue
Garnet Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Late Permian
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -122.24359, 40.90235
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault Seperating Nosoni Fm. From Mccloud Limestone, Trends N-Ne

Ore body information

  • General form LENTICULAR
    Length 15.24M
    Width 6.1M

Comments on the geologic information

  • PROPERTY UNDER LAIN BY MCCLOUD LIMESTONE AND TUFFACEOUS SEDIMENTS AND BASALTIC LAND ANDESITIC FLOWS OF THE NOSONI FORMATION. THE TWO UNITS ARE SEPERATED BY A FAULT AND AN IRREGULARLY SHAPED INTRUSIVE MAFIC QTZ-DIORITE. THE NOSONI METASEDIMENTS GENERALLY DIP 30 TO 60 NE, ONE EXPOSURE OF LIMESTONE DIPS 35SE.

Economic information about the deposit and operations

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

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Southern Pacific Land Co.

Production statistics

  • Year 1958
    Material FE
    Accuracy Estimate
    Description Ap_Grade: ^60.3%
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Iron Iron 60wt-pct
  • Year 1961
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^60% Fe
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Iron Iron 60wt-pct

Comments on the production information

  • REPORTED LOW IN PHOSPHORUS AND SULFUR

Comments on the reserve resource information

  • SECOND MAGNETOMETER SURVEY IN 1961 OR 1962 REVEALED A THIRD AREA OF POTENTIAL ORE, WEST OF OPEN PIT. ASSAYS FROM THREE AREAS AVERAGED .001% SULFUR, SLIGHTLY MORE P2O5 AND .02% TIO2. ESTIMATIONS RANGED FROM 260,000 TONS PER 100 FT. TO A "FEW" HUNDRED THOUSAND TONS.

Comments on the workings information

  • 1903 NUMBER OF OPEN CUTS AND SHORT ADITS WERE DUG ON 11 CLAIMS. U.S. GEOLOGICAL SURVEY CONDUCTED A MAGNETOMETER SURVEY OF AN AREA NEAR SEC. 5, 6, 7, AND 8; SOME BULLDOZER CUTS.

Reference information

Bibliographic references

  • Deposit

    EGENHOFF, E.L., 1948; BIBLIOGRAPHY OF THE IRON-ORE RESOURCES OF CA; IRON RESOURCES OF CA. BULL. 129, DIV. OF MINES, P.

  • Deposit

    LAMEY, C.A., 1948; SHASTA AND CALIFORNIA IRON-ORE DEPOSITS SHASTA COUNTY; DIV. OF MINES BULL. 129, PART K, P. 139-164.

  • Deposit

    LYDON, P.A. AND O'BRIEN, J.C., 1974: MINES AND MINERAL RESOURCES OF SHASTA COUNTY; CA. DIV. OF MINES AND GEOLOGY COUNTY REPT. 6, P. 61-63

  • Production

    LYDON & O'BRIEN, 1974

General comments

Subject category Comment text
Deposit VARIED LENGTHS AND WIDTHS. POOR EXPOSURES AND RELATIVELY WEAK MAGNETIC ANOMALIES INDICATE TWO PRINCIPAL AREAS OF IRON MINERALIZATION ABOUT 1200 FT. APART IN NE 1/4 SEC. 7 AND NW 1/4 SEC. 8, AT 1700 AND 1300 FT. ELEVATIONS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1980 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.