Dennys Gulch

Past Producer in Alaska, United States with commodity Gold

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Mineral occurrence model information
Nearby scientific data
Economic information about the deposit and operations
Mining district
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10001383
MRDS ID	A012125
Record type	Site
Current site name	Dennys Gulch
Alternate or previous names	O'Keefe
Related records	10257382

Geographic coordinates

Geographic coordinates:	-149.1433, 67.39971 (WGS84)
Relative position	This property is at an elevation of about 3,400 ft on the northeast side of the O'Keefe Hills (SE1/4 sec. 29, T. 30 N., R. 7 W., of the Fairbanks Meridian); it is approximately 18 1/2 miles southwest of Chandalar. The reference point coincides with the mine symbol on Dennys Gulch shown on the topographic map. The location is accurate within a 1/2-mile radius.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandalar B-5(quadrangle 1:63,360 scale)

Chandalar S(quadrangle 1:100,000 scale)

Chandalar(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Doyon, Limited(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country	State
United States	Alaska

Commodities

Commodity	Importance
Gold	Primary

Materials information

Materials	Type of material
Gold	Ore

Mineral occurrence model information

Model code	119
USGS model code	39a
Deposit model name	Placer Au-PGE
Mark3 model number	54

Nearby scientific data

(1)	-149.1433, 67.39971	ListMap

Economic information

Comments on the geologic information

Geologic Description = This area was not described by early workers, which suggests that the discovery of placer gold was considerably later than that in many other parts of the district. There are reports of active placer mining on this creek as late as the 1960s but little information after that. Heiner and Wolff (1968) reported that placer gold has been mined from gravels that range in thickness from 6 to 70 ft and that coarse nuggets (valued at as much as $100) have been recovered, although no pay streak was delineated. Bedrock is mapped as quartz-muscovite schist that is highly deformed and cut by many thin quartz veins that contain pyrite (Freeman, 1963).? Brosgi and Reiser (1964) noted 50 ppm Pb in a stream sediment sample from this location. Anomalous radioactivity has been observed at the O'Keefe placer claim near the map site.
Age = Quaternary.

Economic information about the deposit and operations

Development status	Past Producer
Commodity type	Metallic

Comments on exploration

Status = Not determined

Mining district

District name	Chandalar

Comments on the workings information

Workings / Exploration = Placer mining reported as late as 1964 (Brosgi and Reiser, 1964), and six lode gold claims were located in 1955 (Heiner and Wolff, 1968).

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	A012125
USGS	Alaska Resource Data File	ARDF	CH019

Bibliographic references

Deposit

Anderson, Eskil, 1944, Petrographic descriptions of rocks collected during 1944 field investigation in north-west Alaska, and lists of ore and rock samples and placer concentrates collected in northwestern and interior Alaska during 1945 field season: Alaska Territorial Department of Mines Miscellaneous Report 195-28, 76 p.
Deposit

Holdsworth, P.R., 1952, Report of the Commissioner of Mines for the Biennium ended December 31, 1952: Alaska Territorial Department of Mines Annual Report 1952, 66 p.
Deposit

Freeman, V.L., 1963, Examination of uranium prospects, 1956: U.S. Geological Survey Bulletin 1155, p. 29-33.
Deposit

Brosgi, W.P., and Reiser, H.N., 1964, Geologic map and section of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-375, 1 sheet, scale 1:250,000.
Deposit

Heiner, L.E., and Wolff, E.N., eds., 1968, Mineral resources of northern Alaska, Final report, submitted to the NORTH Commission: Mineral Industry Research Laboratory, University of Alaska, Report 16, 306 p.
Deposit

Eakins, G.R., 1969, Uranium in Alaska: Alaska Division of Mines and Geology Geologic Report 38, 49 p., 1 sheet, scale 1:3,800,000.
Deposit

Cobb, E.H., 1972, Metallic mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-457, 1 sheet, scale 1:250,000.
Deposit

Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.
Deposit

Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Deposit

Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168B, 64 p., 1 map, scale 1:1,000,000.
Deposit

Maas, K.M., 1987, Maps summarizing land availability for mineral exploration and development in northern Alaska, 1986: U.S. Bureau of Mines Open-File Report 10-87, 33 sheets.
Deposit

DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.
Deposit

Holdsworth, P.R., 1955, Report of the Commissioner of Mines for the biennium ended December 31, 1954: Alaska Territorial Department of Mines Annual Report 1954, 110 p.
Deposit

Maas, K.M., 1987, Maps summarizing land availability for mineral exploration and development in northern Alaska, 1986: U.S. Bureau of Mines Open-File Report 10-87, 33 quadrangle overlays.
Deposit

Williams, J.A., 1952, A magnetometer survey of Denny's Gulch and Sawlog Creek in the Koyukuk-Chandalar region, Alaska: Alaska Territorial Department of Mines Prospect Evaluation 31-2, 28 p., 1 sheet (of traverse lines, scale 1:2,400, 17 line sheets).

Comments on the references

Primary Reference = Freeman, 1963

General comments

Subject category	Comment text
Deposit	Model Name = Placer Au (Cox and Singer, 1986; model 39a)
Deposit	Other Comments = See also: Sawlog Creek (CH020).? Alaska Kardex No. KX-031-11 (Kardex is a card file mining claim information system located at the State of Alaska DNR Public Information Center in Fairbanks).

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	17-NOV-1999	J.M. Britton	U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.

Dennys Gulch

Geologic information

Identification information

Geographic coordinates

Site location context

Geographic areas

Commodities

Materials information

Mineral occurrence model information

Nearby scientific data

Economic information

Comments on the geologic information

Economic information about the deposit and operations

Comments on exploration

Mining district

Comments on the workings information

Reference information

Links to other databases

Bibliographic references

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Comments on the references

General comments

Reporter information

Beyond USGS

Maps centered on this site

Authoritative Alaska resources