Jorgensen Prospect

Occurrence in Alaska, United States with commodities Gold, Lead, Tungsten

Geologic information

Identification information

Deposit ID 10001996
MRDS ID A012840
Record type Site
Current site name Jorgensen Prospect
Alternate or previous names Borasco Claim, Eureka Claim
Related records 10112150

Geographic coordinates

Geographic coordinates: -165.42216, 64.58456 (WGS84)
Relative position HEAD OF MARY GULCH; W SIDE OF BONANZA HILL
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-247, LOC. 8; AK-KX-52-134. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Tungsten Secondary

Comments on the commodity information

  • MOST AU IN SULFIDES (PYRITE AND/OR ARSENOPYRITE)

Materials information

Materials Type of material
Galena Ore
Gold Ore
Scheelite Ore
Oligoclase Gangue
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble

Nearby scientific data

(1) -165.42216, 64.58456

Geologic structures

Type of structure Local
Structure description Fault: N 65 Degrees W, Stee[ Ne Dip.

Controls for ore emplacement

  • Fault: N 65 Degrees W, Steep Ne Dip.

Comments on the geologic information

  • STRIKE AND DIP OF COUNTRY ROCK: N, 28 DEGREES E; JOINTS: N 30 DEGREES E, 70 DEGREES NW; QUARTZ VEINS: N 60 DEGREES E, 90.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1916

Comments on development

  • 2 LODE CLAIMS STAKED, 1916.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012840

Bibliographic references

  • Deposit

    USGS BULLETIN 662, P. 434-435.

  • Deposit

    USGS BULLETIN 722, P. 240-241.

  • Deposit

    TDM PAM 5-R, P. 27, 43.

  • Deposit

    USGS MF-247, LOC. 8.

  • Deposit

    USGS BULLETIN 1246, P. 124.

  • Deposit

    USGS OFR 77-796-B, P. 28, LOC. 370.

  • Other Database

    BAG-MF-463-47

General comments

Subject category Comment text
Deposit QUARTZ VEINS AND IRON-STAINED SCHIST CUT BY 1 FT WIDE FAULT ZONE; SCHIST IMPREGNATED WITH ARSENOPYRITE AND PYRITE, ESPECIALLY NEAR FAULT; AU OCCURS AS FREE GOLD AND IN SULFIDES; PYRITE, ARSENOPYRITE, AND GALENA OCCUR AS VEINLETS IN QUARTZ VEINS; SCHEELITE ALSO REPORTED IN QUARTZ VEINS.
Deposit ORE PARAGENESIS: 1) AURIF. QUARTZ-SCHEELITE VEINS, 2) POST-MIN MOVEMENT ALONG FAULT, 3) INTRODUCTION OF AU AND SULFIDES INTO FISSURES IN QUARTZ VEINS AND DISS. IN WALL ROCK. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey
Editor 02-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.