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Portland Prospect

Occurrence in Alaska, United States with commodity Gold
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Geologic information

Identification information

Deposit ID 10000834
MRDS ID A011487
Record type Site
Current site name Portland Prospect

Geographic coordinates

Geographic coordinates: -145.3081, 61.29712 (WGS84)
Location accuracy 2000(meters)
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • LOCATION APPROXIMATED FROM USGS OFR 80-892B, LOC. 38 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991). ; INFO FROM LAND.ST :49?

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Analytical data

Result NO DATA

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Valdez Group
    Rock description Valdez Group;Valdez Group

Nearby scientific data

(1) -145.3081, 61.29712
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Ore body information

  • General form VEIN, LENS

Comments on the geologic information

  • SLATE, GRAYWACKE INTRUDED BY DIORITE PORPHYRY.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Tiekel

Comments on development

  • CLAIMS LOCATED BEFORE 1916

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011487

Bibliographic references

  • Deposit

    USGS BULL 662, P. 177

  • Deposit

    USBM IC 8626, P. 19

  • Deposit

    USGS MF-438, LOC. 46

  • Deposit

    USGS OFR 80-892B, LOC. 38

  • Other Database

    BAG-OFR-80-892B-38

General comments

Subject category Comment text
Deposit THIN AURIFEROUS QUARTZ VEINS AND LENSES IN ALTERED SLATE AND GRAYWACKE CUT BY FELSIC DIORITE PORPHYRY DIKES
Deposit SIMILAR TO PORT VALDEZ LODE DEPOSITS ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1994 Mosier, Dan U.S. Geological Survey