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  3. Mineral Resource Data System (MRDS)

Mahan Prospect

Prospect in Idaho county in Idaho, United States with commodities Gold, Copper, Silver
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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. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Reserves and resources
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10071739
MRDS ID W015277
MAS/MILS ID 0160490452
Record type Site
Current site name Mahan Prospect

Geographic coordinates

Geographic coordinates: -115.26676, 45.21208 (WGS84)
Elevation 2164
Relative position 16.5 MI SE OF MACKAY BAR RANCH

Site location context

Political divisions (FIPS codes)

Idaho(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Big Creek(quadrangle 1:24,000 scale)

Warren(quadrangle 1:100,000 scale)

Elk City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Middle Fork Salmon(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower 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)

Frank Church-River of No Return Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Idaho

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 022N 010E 29, 30 Idaho

Comments on the location information

  • Property Is Along The Upper Half Of The West Fork Of Mulligan Creek In Sections 29, 30, And 32.; Main Workings W Of Creek.

Commodities

Commodity Importance
Gold Primary
Copper Tertiary
Silver Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Malachite Ore
Magnetite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification

Analytical data

Result 15 SAMPLES ASSAYED TRACE TO 0.49 OZ AU, .2 TO 8.2 OZ AG/TON
Result TRACE TO 2.11% CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Syenite
    Rock unit name Ramey Ridge Equivalent-Syenite;Dikes-Lamprophyre, Rhyolite
    Rock description Ramey Ridge Equivalent-Syenite;Dikes-Lamprophyre, Rhyolite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Syenite

Nearby scientific data

(1) -115.26676, 45.21208
ListMap

Economic information

Ore body information

  • Strike N
    Dip 90 DEG
    Width 0.91M
  • General form IRREGULAR FISSURE VEIN
    Strike N16W
    Dip 56E
    Width 0.5M

Controls for ore emplacement

  • Fissure
  • Shear Zone
  • Fracturing

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1907
Discoverer Charles Mahan And Son

Mining district

District name Ramey Ridge District

Land status

Ownership category National Forest
Area name Payette National Forest
Ownership category National Primitive Area
Area name Idaho Primitive Area

Ownership information

  • Type Owner
    Owner Messrs. Cahill, Leatherman, And Earl
    Interest 100
    Home office Idaho
    First year 1961

Reserves and resources

  • Type In-situ
    Estimate year 1973
    Indicated 90780mt ore
    Demonstrated 90780mt ore
    Total resources 90780mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold 1.0099 g/mt Gold Major 1973
    Copper 1.0099 g/mt Copper Trace 1973
    Silver 0.2 wt-pct Silver Trace 1973

Comments on the reserve resource information

  • Potential Resources Of Mapped Area Are Estimated To Be More Than 90780. Prospects Along The East Side Of The West Fork Of Mulligan Creek And Beaver Ridge Prospect Are All Near The Mahan Group And Can Be Considered As A Unit For Estimating Future Potential.

Comments on development

  • 2 Stamp Mills; More Than 12 Groups Claims Located From 1907 To 1940.

Reference information

Bibliographic references

  • Deposit

    Cater, F. W., And Others, 1973, Mineral Resources Of The Idaho Primitive Area And Vicinity, Idaho: USGS Bulletin 1304, 431 P

  • Deposit

    WFOC Mineral Property File No. 0160490452.

General comments

Subject category Comment text
Deposit 2 Veins, 1 Striking N 16 Deg W, The Other N 56 Deg E. Both Dip Vertically

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1974 Miller, Pat J. U.S. Geological Survey
Reporter 27-FEB-1984 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site