Willoughby Island West

Prospect in Alaska, United States with commodities Antimony, Copper, Gold, Lead, Silver

Geologic information

Identification information

Deposit ID 10137019
MRDS ID A013180
MAS/MILS ID 0021110055
Record type Site
Current site name Willoughby Island West
Alternate or previous names Dorwalt R., Esmereda No. 1-2, Smith Prospect, Treadwell Yukon Co.
Related records 10002276

Geographic coordinates

Point of reference Claim
Geographic coordinates: -136.14518, 58.59283 (WGS84)
Elevation 136
Location accuracy 500(meters)
(click for info)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 038 S 056 E 10 NW Alaska


Commodity Importance
Antimony Primary
Copper Tertiary
Gold Tertiary
Lead Tertiary
Silver Tertiary

Nearby scientific data

Claim (1) -136.14518, 58.59283

Ore body information

  • Area 1HA
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin CONT METASOMATIC
    Primary Ore Control FRACTURING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 PYRITIZATION
    Total Surface Area (HA) 1
    Date of Last Modification 830408

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1888

Mining district

District name Juneau District

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Wilderness

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 0021110055
USGS Mineral Resources Data System MRDS A013180 MAS references MRDS

Bibliographic references

  • Ownership

    ALASKA KARDEX 111-010

  • Deposit

    B592f p. 100

  • Deposit

    B682 pp. 43-45, 114

  • Deposit

    OF51 p. 67

  • Deposit

    B1121K p. 48

  • Deposit

    B1121K plate 1

  • Deposit

    B1246 pp. 160-161

  • Deposit

    P632 pp. 39-40, 44-45, 53, 69

  • Deposit


  • Deposit

    OF78-316 p. 72

  • Deposit

    OF78-316 p. 69

  • Deposit

    OF78-494 plates 1A, 1B, 2

Comments on the references

  • RATAJ, 1975, P. 1, 3, 5, 11 (BM UNPB NOTES)

Reporter information

Type Date Name Affiliation Comment
Reporter 14-JUL-1995 Wlg U.S. Bureau of Mines