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  3. Mineral Resource Data System (MRDS)

Big Boulder and Iron Ridge Prospect

Occurrence in Maricopa county in Arizona, United States with commodities Iron, Manganese
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10048190
MRDS ID M800258
Record type Site
Current site name Big Boulder and Iron Ridge Prospect
Related records 10210176

Geographic coordinates

Geographic coordinates: -112.16101, 33.98006 (WGS84)
Location accuracy 1000(meters)
Relative position 14 MILES NORTHEAST OF PIKES PEAK MINE, Utm Located At Center Of Section 4

Site location context

Political divisions (FIPS codes)

Maricopa(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New River(quadrangle 1:24,000 scale)

Phoenix North(quadrangle 1:100,000 scale)

Phoenix(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Agua Fria(hydrologic unit)

Lower Gila-Agua Fria(hydrologic accounting unit)

Lower Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management AZ)

Bureau of Land Management AZ BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Arizona Maricopa

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 007N 002E 3,4,5 Arizona

Commodities

Commodity Importance
Iron Primary
Manganese Critical Primary

Materials information

Materials Type of material
Hausmannite Ore
Hematite Ore
Limonite Ore
Magnetite Ore
Martite Ore
Pyrolusite Ore
Apatite Gangue
Ilmenite Gangue
Pyrite Gangue

Alteration

  • (Local) Silicification

Analytical data

Result 24.6-33.1% FE, 1.04-2.5% MN, 31.8-51.8% SIO2, 0.15-0.4% TIO2,, 0.12-0.194% P, 0.1-0.12% S, MAX AND MIN OF 4 SAMPLES. OTHER ANALYSES INDICATED CO, NI, CU, V, AS, PB, ZN

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -112.16101, 33.98006
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Laminated, Banded Iron Minerals, Quartz

Ore body information

  • Thickness 1.52M
    Length 3218.6M
    Width 152.4M
    Depth to top 0M

Comments on the geologic information

  • TACONITE HAS WELL DEVELOPED SLATLY CLEAVAGE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discoverer D. Gordon, D.E. Elwood, W.E. Bruce, M. Garcia

Mining district

District name Tip Top District

Land status

Ownership category Federal

Ownership information

  • Type Owner
    Owner Otto E. Elwert
    First year 1962

Comments on development

  • 19 CLAIMS AND 3 PLACERS

Reference information

Bibliographic references

  • Deposit

    HARRER, USBM IC 8236, 1964, P64-66

General comments

Subject category Comment text
Deposit IRON OXIDE BANDS ARE 1.8 IN. TO SEVERAL FEET THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-82 Peterson, Jocelyn A. 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 Arizona resources

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