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Comet & Kensington Mines

Past Producer in Alaska, United States with commodities Gold, Lead, Copper
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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. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10000505
MRDS ID A010695
Record type Site
Current site name Comet & Kensington Mines
Alternate or previous names Eureka, Sherman Creek

Geographic coordinates

Geographic coordinates: -135.07984, 58.86225 (WGS84)
Location accuracy 1000(meters)
Relative position Point Within 2500 Ft Of Each Of Two Consolidated Mines

Site location context

Political divisions (FIPS codes)

Juneau(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Juneau D-4(quadrangle 1:63,360 scale)

Juneau NW(quadrangle 1:100,000 scale)

Juneau(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lynn Canal(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • COMET AND KENSINGTON MINES AND OTHER LESSER PROPERTIES WERE CONSOLIDATED IN 1915 (APPROX). LOCATION GIVEN IS ABOUT MIDWAY BETWEEN COMET & KENSINGTON (AND WITHIN HALF MILE OF EACH). LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).; PREVIOUS QUAD DESIGNATION = SKAGWAY 1:250000

Commodities

Commodity Importance
Gold Primary
Lead Tertiary
Copper Tertiary

Materials information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -135.07984, 58.86225
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Veins In Comet Are In Diorite And Nearly Normal To Contact With Slate & Graywacke

Ore body information

  • General form TABULAR
    Depth to top 0M

Controls for ore emplacement

  • Veins And Stockworks Of Veins In Fracture Zones In Diorite

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895

Production statistics

  • Year 1901
    Period 1897-1901
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 6g/mt

Comments on the production information

  • COMET PRODUCTION COULD HAVE BEEN SIGNIFICANTLY MORE THAN THE RECORDED 22,250 OZ.

Workings at the site

  • Type of workings Surface/Underground
    Length 3048M
    Overall depth 304.8M

Comments on the workings information

  • LONG ADITS INTERSECTED MAIN ORES BODIES UP TO 2000 FT FROM PORTAL AND AT DEPTH OF UP TO 1000 FT BENEATH SURFACE.

Comments on development

  • ALL OR NEARLY ALL PRODUCTION 1894 TO 1904. DEVELOPMENT ACTIVITIES (SOME EXTENSIVE) OCCURRED PERIODICALLY UNTIL AT LEAST WORLD WAR II.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit ORE ZONES DESCRIBED AS "POCKETY" OR IN "BONANZAS".
Deposit Discovery Year: 1890'S
Deposit SEVERAL OTHER LESSER PROPERTIES IN IMMEDIATE VICINITY ARE: BEAR, JOHNSON, SEWARD, OPHIR, NORTHERN BELL, AND HORRIBLE. ALL ARE QUARTZ VEINS IN DIORITE AT OR NEAR CONTACT. NORTHERN BELL MAY HAVE HAD SIGNIFICANT PRODUCTION, BUT DATA LACKING. JOHNSON LODE CUT BY EXTENSION OF KENSINGTON ADIT. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-84 Elliott, R. L. 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.