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Dry Cottonwood Placer

Producer in Deer Lodge county in Montana, United States with commodities Gold, Corundum, Gemstone
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10019508
MRDS ID DC10708
Record type Site
Current site name Dry Cottonwood Placer

Geographic coordinates

Geographic coordinates: -112.65006, 46.20407 (WGS84)
Relative position CONFLUENCE OF THE N AND S FORKS IS AT DRY COTTONWOOD GUARD STA. 11 KM NE OF WARM SPRINGS.

Site location context

Political divisions (FIPS codes)

Deer Lodge(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Orofino Mountain(quadrangle 1:24,000 scale)

Butte North(quadrangle 1:100,000 scale)

Butte(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Clark Fork(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Montana Deer Lodge

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 005N 008W 06,07,08,16,17,21 Montana

Comments on the location information

  • LAT. LONG FOR GUARD STATION, MOST WORK HAS BEEN DONE ON S FORK FOR 4 MILES. INFO FROM LAND.ST :(1959)

Commodities

Commodity Importance
Gold Primary
Corundum Primary
Gemstone Primary

Comments on the commodity information

  • THE SAPPHIRES ARE NATURALLY PALE, BUT CAN BE HEAT TREATED TO ACHIEVE A DEEPER BLUE COLOR.

Materials information

Materials Type of material
Gold Ore

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Stratigraphic age (youngest) Pleistocene

Nearby scientific data

(1) -112.65006, 46.20407
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith

Comments on the geologic information

  • GOLD AND SAPPHIRES FOUND ON AND NEAR BEDROCK

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Orofino District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner American Gem
    First year 1994

Comments on the production information

  • PRODUCTION IN 1907 WAS PAID FOR BY THE AMOUNT OF GOLD FOUND FOR BOTH GOLD AND SAPPHIRES, NO REAL MARKET FOR SAPPHIRES SO PRODUCTION ENDED.

Comments on the reserve resource information

  • RESERVES ARE FOR A 17.5 ACRE PORTION OF THE 400 ACRE PROPERTY.

Comments on the workings information

  • 2 CONNECTED-BUCKET DREDGES WERE USED, HYDRAULICS

Comments on development

  • PREVIOUSLY OWNED BY NAT SIMON, BOX 185, BUTTE MONT. IN SEPTEMBER, 1994, A WASH PLANT WAS UNDER CONSTRUCTION AND EXPECTED TO BE OPERATIONAL BY OCTOBER, 1994.

Reference information

Bibliographic references

  • Deposit

    MBMG MEM NO 31, P. 21.

  • Deposit

    USBM INF CIR 7461, P. 5

  • Deposit

    MBMG MEM NO 26, P. 25, 27

  • Deposit

    USGS MIN. RES. PART II, P. 881-4.

  • Deposit

    USGS BULL 842, P. 283-4.

  • Deposit

    THE NORTHERN MINER, 1994, AMERICAN GEM PRODUCING SAPPHIRES IN MONTANA: V. 80, NO. 30, P. 1, 10, 11.

  • Production

    USGS MIN. RES. 1910, PART II.

  • Reserve-Resource

    THE NORTHRN MINER, 1994.

General comments

Subject category Comment text
Deposit DURING 1992-1994, AMERICAN GEM ACQUIRED CONTROL OF MOST OF THE HISTORIC SAPPHIRE MINING AREAS IN MONTANA. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1974 Unknown U.S. Geological Survey
Updater 01-JAN-1980 Wise, Kristine K. (Elliott, James E.) U.S. Geological Survey
Updater 14-DEC-1994 Orris, Greta J. U.S. Geological Survey

Beyond USGS

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

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