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Chichagoff Mine

Past Producer in Alaska, United States with commodities Gold, Silver, Lead, Arsenic
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Geologic information

Identification information

Deposit ID 10000499
MRDS ID A010688
Record type Site
Current site name Chichagoff Mine
Alternate or previous names De Groff, Golden Gate

Geographic coordinates

Geographic coordinates: -136.10202, 57.6636 (WGS84)
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • 1 1/2 MILES FROM HIRST-CHICHAGOF MINE 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
Silver Primary
Lead Secondary
Arsenic Tertiary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Sitka Graywacke;Sitka Graywacke
    Rock description Sitka Graywacke;Sitka Graywacke

Nearby scientific data

(1) -136.10202, 57.6636
ListMap

Geologic structures

Type Description Terms
Regional Sitka Fault Zone Is A Major Regional Feature
Local Chichagof Fault Localizes Ore Shoots

Ore body information

  • General form TABULAR, LENTICULAR
    Dip }
    Plunge 70 DEGREES
    Depth to top 0M
    Width 2.44M

Controls for ore emplacement

  • Intersections Of Chichagof Fault And Splays, Also Warp In Chichagof Fault. Galena Indicative Of Good Ore

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1905
Year of first production 1906
Year of last production 1943

Mining district

District name Chichagof District

Land status

Ownership category National Forest

Comments on the production information

  • NO TONNAGE FIGURES AVAILABLE. AVERAGE PLATE RECOVERY IN MILL REPORTED AS 1.07 OZ AU/TON AND 0.225 OZ AG/TON

Workings at the site

  • Type of workings Surface
    Overall depth 1203.96M
    Overall length 1447.8M

Comments on the workings information

  • MANY THOUSANDS OF FT OF UNDERGROUND WORKINGS ON SEVERAL LEVELS

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010688

Bibliographic references

  • Deposit

    USGS OFR 78-450, P. 28-31

  • Deposit

    USGS B929, P. 78-81, 86-101

  • Deposit

    ADGGS SPEC REPT 31, P. 46

  • Production

    ADGGS SPEC REPT 31

General comments

Subject category Comment text
Deposit DEPOSITS ARE QUARTZ BODIES IN FAULT ZONES. ORE SHOOTS ARE STEEPLY PLUNGING AND LOCALIZED ALONG INTERSECTIONS OF CHICHAGOF FAULT AND SPLAYS FROM IT AND BY ROLL IN MAIN FAULT. STORE WIDTH OF SHOOTS GENERALLY 2-8 FT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1984 Elliott, R. L. U.S. Geological Survey PARSED DATA INTO ORE BODY MULTIVALUED FIELDS
Editor 13-APR-1994 Mosier, Dan U.S. Geological Survey PARSED DATA INTO WORKINGS MULTIVALUED FIELDS
Editor 30-MAY-1995 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey
Editor 30-MAY-1995 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey