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Mortimer Prospect

Prospect in Washington county in Idaho, United States with commodities Copper, Iron, 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10070238
MRDS ID W013001
MAS/MILS ID 0160870020
Record type Site
Current site name Mortimer Prospect
Alternate or previous names Iron Mountain Min. Co., Mortimer Iron Deposit

Geographic coordinates

Geographic coordinates: -117.0241, 44.55236 (WGS84)
Elevation 1737
Relative position 20 MI. NORTH OF WEISER, IDAHO AND 6 MI. EAST OF THE SNAKE RIVER

Site location context

Political divisions (FIPS codes)

Washington(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Monroe Butte(quadrangle 1:24,000 scale)

Baker City(quadrangle 1:100,000 scale)

Baker City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Weiser(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Payette 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 Idaho Washington

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 014N 006W 23 NWSE Idaho

Comments on the location information

  • MULTIPLE WORKINGS IN SECS. 14 AND 23.

Commodities

Commodity Importance
Copper Primary
Iron Tertiary
Gold Tertiary

Materials information

Materials Type of material
Magnetite Ore
Garnet Gangue

Alteration

  • (Local) Cavities In Magnetite Due To Leaching Of Sulfides.

Analytical data

Result 61 PERCENT FE, 4.7 PERCENT SIO2 (ANALYSIS FROM 23-LB CHIP SAMPLE)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Granitic Rocks;Basalt Dike;Perm-Tri
    Rock description Granitic Rocks;Basalt Dike;Perm-Tri
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
    Rock unit name Martin Bridge Formation-Marble
    Rock description Martin Bridge Formation-Marble
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -117.0241, 44.55236
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description High - Angle Faulting With Westward Tilting Of The Fault Blocks.
Type of structure Local
Structure description Postintrusion Fault Is Inferred To The North Of The Deposit.

Ore body information

  • General form TABULAR
    Thickness 30.48M
    Length 91.44M
    Width 30.48M

Controls for ore emplacement

  • Contact Of Granite And Limestone (Tactite)

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1897

Mining district

District name Iron Mountain District

Land status

Ownership category National Forest
Area name Payette National Forest

Ownership information

  • Type Operator
    Owner Iron Mountain Mining Co.
    Interest 100
    First year 1947
  • Type Owner
    Owner Mortimer, Frank (Pres.)
    Home office Weiser, Idaho
    First year 1943

Reserves and resources

  • Type In-situ
    Estimate year 1947
    Measured 1000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 61 wt-pct Iron Trace 1947
  • Type In-situ
    Estimate year 1947
    Indicated 15000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 61 wt-pct Iron Trace 1947

Comments on the workings information

  • SEVERAL EXPLORATORY SHAFTS AND PITS HAVE BEEN DUG.

Comments on development

  • ECON.COM: 33 MI FROM RAIL HEAD AT WEISER

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Discovery Year: LATE 1890'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1976 Nakai, Terry L.; Miller, Pat U.S. Geological Survey
Reporter 14-MAR-1995 Winters, Dick U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site