Unnamed Near Towers Arm

Unknown in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID	10003652
MRDS ID	A106419
Record type	Site
Current site name	Unnamed Near Towers Arm

Geographic coordinates

Geographic coordinates:	-133.37162, 56.83974 (WGS84)
Relative position	SEE LOCATION COMMENTS
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Geographic areas

Country	State
United States	Alaska

Comments on the location information

APPROXIMATELY THE CENTER OF A LARGE BLOCK OF AT LEAST 492 CLAIMS THAT COVER MORE THAN 30 SQUARE MILES AROUND UPPER TAYLOR ARM OF DUNCAN CANAL. LOCALITY 14 OF GRYBECK, BERG, AND KARL (1984); SEE THAT PUBLICATION AND U. S. BUREAU OF MINES (1980), FOR AN OUTLINE OF THE CLAIM BLOCK.

Commodities

Commodity	Importance
Copper	Primary

Nearby scientific data

(1)	-133.37162, 56.83974	ListMap

Ore body information

General form SEE DEPOSIT DESCRIPTION COMMENTS

General form	SEE DEPOSIT DESCRIPTION COMMENTS

Economic information

Economic information about the deposit and operations

Commodity type	Metallic
Significant	No

Comments on exploration

Status = Probably inactive

Mining district

District name	Kupreanof

Comments on the production information

NONE

Comments on the workings information

NUMEROUS DIAMOND DRILL HOLES WERE DRILLED WIDELY ON THE CLAIM BLOCK IN 1978 AND 1979 BY AMOCO MINERALS (INCLUDING ON THE NORTHERN COPPER PROSPECT , PE005, FROM A CAMP LOCATED ON THE SOUTHERN END OF THE PENINSULA BETWEEN TOWERS ARM AND THE NORTH ARM OF DUNCAN CANAL. THE TARGET OF THE EXPLORATION WAS MASSIVE-SULFIDE, BASE-METAL DEPOSITS AND THE DRILLING WAS SPECIFICALLY DIRECTED TO AIRBORNE GEOPHYSICAL ANOMALIES. MOST IF NOT ALL OF THE HOLES WERE DEVOID OF SIGNIFICANT METAL VALUES AND THE GEOPHYSICAL ANOMALIES LARGELY PROVED TO BE ASSOCIATED WITH GRAPHITIC LAYERS (ORAL COMMUNICATION, 1979, AMOCO MINERALS).

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	A106419
USGS	Alaska Resource Data File	ARDF	PE007

Bibliographic references

Deposit

Grybeck, D. J., Berg, H. C., and Karl, S. M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

General comments

Subject category	Comment text
Deposit	NUMEROUS DIAMOND DRILL HOLES WERE DRILLED WIDELY ON THE CLAIM BLOCK IN 1978 AND 1979 BY AMOCO MINERALS (INCLUDING ON THE NORTHERN COPPER PROSPECT, PE005, FROM A CAMP LOCATED ON THE SOUTHERN END OF THE PENINSULA BETWEEN TOWERS ARM AND THE NORTH ARM OF DUNCAN CANAL. THE TARGET OF THE EXPLORATION WAS MASSIVE-SULFIDE, BASE-METAL DEPOSITS AND THE DRILLING WAS SPECIFICALLY DIRECTED TO AIRBORNE GEOPHYSICAL ANOMALIES. MOST IF NOT ALL OF THE HOLES WERE DEVOID OF SIGNIFICANT METAL VALUES AND ONLY CHALCOPYRITE IN MINOR AMOUNTS WAS FOUND. THE GEOPHYSICAL ANOMALIES LARGELY PROVED TO BE ASSOCIATED WITH GRAPHITIC LAYERS (ORAL COMMUNICATION, 1979, AMOCO MINERALS). BREW AND OTHERS (1984) MAPPED MOST OF THE AREA AS UNDIFFERENTIATED MESOZOIC ROCKS. HOWEVER, RECENT MAPPING (SUE KARL, USGS, ORAL COMMUNICATION, 1998) SUGGESTS THAT SOME OF THE AREA PROBABLY INCLUDES TRIASSIC HYD GROUP ROCKS.

Subject category

Comment text

Deposit

NUMEROUS DIAMOND DRILL HOLES WERE DRILLED WIDELY ON THE CLAIM BLOCK IN 1978 AND 1979 BY AMOCO MINERALS (INCLUDING ON THE NORTHERN COPPER PROSPECT, PE005, FROM A CAMP LOCATED ON THE SOUTHERN END OF THE PENINSULA BETWEEN TOWERS ARM AND THE NORTH ARM OF DUNCAN CANAL. THE TARGET OF THE EXPLORATION WAS MASSIVE-SULFIDE, BASE-METAL DEPOSITS AND THE DRILLING WAS SPECIFICALLY DIRECTED TO AIRBORNE GEOPHYSICAL ANOMALIES. MOST IF NOT ALL OF THE HOLES WERE DEVOID OF SIGNIFICANT METAL VALUES AND ONLY CHALCOPYRITE IN MINOR AMOUNTS WAS FOUND. THE GEOPHYSICAL ANOMALIES LARGELY PROVED TO BE ASSOCIATED WITH GRAPHITIC LAYERS (ORAL COMMUNICATION, 1979, AMOCO MINERALS). BREW AND OTHERS (1984) MAPPED MOST OF THE AREA AS UNDIFFERENTIATED MESOZOIC ROCKS. HOWEVER, RECENT MAPPING (SUE KARL, USGS, ORAL COMMUNICATION, 1998) SUGGESTS THAT SOME OF THE AREA PROBABLY INCLUDES TRIASSIC HYD GROUP ROCKS.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-NOV-1998	Berg, H. C. (Grybeck, D. J.)	U.S. Geological Survey