Sampson

Prospect in Skamania county in Washington, United States with commodities Copper, Gold, Iron, Lead, Molybdenum, Silver, Zinc

Geologic information

Identification information

Deposit ID 10301870
MAS/MILS ID 0530590071
Record type Site
Current site name Sampson
Alternate or previous names Earl, Margaret Mine Project, Spirit Lake

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -122.07729, 46.35791 (WGS84)
Location accuracy 1000(meters)
(click for info)

Geographic areas

Country State County
United States Washington Skamania

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 010 N 006 E 07,08 NE (07), SE (08) Washington

Comments on the location information

  • NOTE: SITE MAY BE BURIED UNDER DEBRIS FROM THE MAY 18, 1980 ERUPTION OF MOUNT ST. HELENS.
  • See fig. 11 in Moen (1977, p. 20) for locations of the 13 patented claims that comprise the Earl Group (also known as Sampson).

Commodities

Commodity Importance
Copper Tertiary
Gold Tertiary
Iron Tertiary
Lead Tertiary
Molybdenum Tertiary
Silver Tertiary
Zinc Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Silver Ore
Azurite Ore
Malachite Ore
Tourmaline Gangue
Sphalerite Unknown

Alteration

  • (Local) silicic
  • (Local) Quartz sericitic
  • (Local) argillic
  • (Local) propylitic

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Quartz Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

Main Entrance (1) -122.07729, 46.35791

Ore body information

  • General form breccia pipes
    Area 60HA
    Field Value
    Total Surface Area (HA) 60
    Date of Last Modification 910418

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1900

Mining district

District name Mount St. Helens

Mineral rights holdings

Type of mineral rights Private Lease
Type of mineral rights Located Claim
Type of mineral rights Patented

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Mt. St. Helens Consolidated Mining,As Of 1926
    Interest 100
    Home office Washington
    Year 1977

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0530590071

Bibliographic references

  • Deposit

    WA. DIV. MINES AND GEOL. BULLETIN 37, 1956, PART II, VOL. 1, P. 78.

  • Deposit

    WAS. DIV. MINES AND GEOL. INFO. CIRC. 48, 1973, P. 15.

  • Deposit

    Moen, W.S., 1977, St. Helens and Washougal Mining Districts of the sourthern Cascades of Washington: Washington Division of Geology and Earth Resources INFO. CIRC. 60, 1977, P. 25.

  • Deposit

    U.S. BUREAU OF MINES RI 5343, 1957, 16 P.

  • Deposit

    HILLMAN, C. T., 1970, GEOLOGY OF THE MT. MARGARET-GREEN RIVER AREA, WASHINGTON: M.S. THESIS, MIAMI UNIV., OXFORD, OH.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-OCT-92 Sweeney, Thomas M. U.S. Bureau of Mines
Updater 20-MAY-09 Causey, J. Douglas U.S. Geological Survey