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Nugget Creek Placer

Producer in Alaska, United States with commodities Gold, Tin, Tungsten
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10107515
MRDS ID A011579
Record type Site
Current site name Nugget Creek Placer
Alternate or previous names Nugget Bench High Channel Deposit
Related records 10136996

Geographic coordinates

Geographic coordinates: -150.94001, 62.52343 (WGS84)
Relative position TRIBUTARY TO CACHE CREEK

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Talkeetna C-2(quadrangle 1:63,360 scale)

Talkeetna NE(quadrangle 1:100,000 scale)

Talkeetna(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Yentna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • LOCATION IS NUGGET BENCH HIGH CHANNEL DEPOSIT, USBM OFR 24-78, FIG. 4.2-B(3) 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
Tin Critical Tertiary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Garnet Gangue
Magnetite Gangue
Pyrite Gangue
Zircon Gangue
Cassiterite Unknown
Scheelite Unknown

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Kenai Group;;;
    Rock description Kenai Group;;;
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Rock unit name Kenai Group;
    Rock description Kenai Group;

Nearby scientific data

(1) -150.94001, 62.52343
ListMap

Economic information

Comments on the geologic information

  • GEOL.COM: NUGGET BENCH HIGH CHANNEL IS CUT INTO ARGILLITE OF JURASSIC TO CRETACEOUS AGE; CHANNEL CAN BE PROJECTED BY MAGNETIC METHODS 400 FT BEYOND MINED SECTION ; MAJOR.UNITS: STREAM HEADS IN MESOZOIC SLATES AND GRAYWACKES CONTAINING AURIFEROUS VEIN QUARTZ; LOWER COURSE IN TERTIARY CONTINENTAL ROCKS OF KENAI GROUP. UPPER MEMBER OF KENAI FORMATION IS PREDOMINATELY A SANDY CONGLOMERATE OF WELL ROUNDED, WELL INDURATED COBBLES 2 TO 6 IN IN DIAMETER COMPOSED OF BLACK SILTSTONE, QUARTZ, QUARTZ MONZONITE, GRAYWACKE AND GREENISH WHITE FELDSPAR PORPHYRY; MINOR SILTY SANDSTONE WITH SEAMS OF CLAYSTONE AND SPARSE LENSES OF CONGLOMERATE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1905

Mining district

District name Yentna/Cache Creek

Comments on the production information

  • 30,000 OZ AU PRODUCED FROM 1000 FT SECTION MINED ALONG NUGGET BENCH CHANNEL, USBM OFR 24-78, P. 4-114

Comments on the workings information

  • NUGGET BENCH CHANNEL HAS BEEN MINED FOR 1000 FT ALONG A NE-SW TREND ACROSS NUGGET CREEK, CHANNEL SLOPES AWAY FROM PRESENT DRAINAGE DIRECTION, SO BEDROCK DRAINS HAVE BEEN CUT TO NUGGET CREEK

Comments on development

  • HYDRAULIC MINING HAS BEEN USED ON ELEVATED BENCH GRAVELS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit BOTH QUATERNARY GLACIOFLUVIAL DEPOSITS AND TERTIARY CONGLOMERATIC UNITS HAVE BEEN MINED ON NUGGET CREEK; SEE ALSO: CACHE CREEK; GLACIOFLUVIAL DEPOSITS SIMILAR TO NUGGET CREEK CAN BE FOUND ON WINDY CREEK AND BIRD CREEK ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
Deposit AVRIFEROUS STREAM GRAVELS 6 TO 8 FT DEEP; BENCH GRAVELS 1 TO 6 FT DEEP; UPPER CONGLOMERATIC UNIT OF KENAI FORMATION HAS BEEN MINED AT NUGGET BENCH HIGH CHANNEL, NE 1/4, SEC. 16, T. 28 N., R. 9 W., USGS OFR 311, P. 11

Reporter information

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