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Apex Gold-Silver Mine

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

Geologic information

Identification information

Deposit ID 10002329
MRDS ID A013241
Record type Site
Current site name Apex Gold-Silver Mine
Related records 10283101

Geographic coordinates

Geographic coordinates: -136.29899, 57.95054 (WGS84)
Elevation 305
Relative position 1.4 MI. SW OF MOUTH OF CANN CREEK ON W SHORE OF LISIANSKI INLET

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sitka D-7(quadrangle 1:63,360 scale)

Sitka NW(quadrangle 1:100,000 scale)

Sitka W OE(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central 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

  • USGS B 1058-E, PLATE 13; USGS MF-467, LOC. 6; USGS MF 1476-B, LOC. 4. LOCATION IS PORTAL OF APEX MINE. 0.45 MI. NW OF EL NIDO 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
Copper Tertiary
Lead Tertiary
Zinc Critical Tertiary
Antimony Critical Tertiary
Tungsten Critical Tertiary

Comments on the commodity information

  • ASSAY DATA FROM USGS B 773, P. 121.

Materials information

Materials Type of material
Chalcopyrite Ore
Scheelite Ore
Sphalerite Ore
Pyrite Gangue
Sericite Gangue

Analytical data

Result APEX LODE ASSAYS IN ADIT AVERAGED 1.9 OZ/TON AU, VEIN SURFACE OUTCROP AVERAGED 4.57 OZ/TON AU.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

(1) -136.29899, 57.95054
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faults And Aplite Dikes In Amphibolite Mass.

Ore body information

  • General form PINCH AND SWELL
    Strike N 42 DEGREES-60 DEGREES E
    Dip 30 DEGREES-80 DEGREES NW
    Plunge 50 DEGREES-60 DEGREES
    Plunge direction NE
    Thickness 182.88M
    Length 609.6M
    Width 1.52M

Controls for ore emplacement

  • Vein Along Fault Or Shear Zone

Comments on the geologic information

  • MES-PAL AMPHIBOLITE MASS WITH CRET-JUR (?) APLITE DIKES IN CRET-JUR DIORITE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1919
Discoverer J.H. Cann
Year of first production 1920
Year of last production 1939

Mining district

District name Chichagof

Land status

Ownership category National Forest

Comments on the reserve resource information

  • ESTIMATED RESERVES OF BOTH APEX AND EL NIDO MINES ARE 25,000 OZ. AU, ACCORDING TO USGS MF-1476-B, P. 1.

Workings at the site

  • Type of workings Underground
    Length 1097.28M
    Overall depth 243.84M
    Overall length 457.2M
    Overall width 152.4M

Comments on the workings information

  • 2,400 FT. OF TUNNELS AND 1,200 FT. OF RAISES OPENED ON 4 LEVELS. AERIAL TRAMWAY FROM MINE TO MILL. UNDERGROUND WORKINGS IN POOR CONDITION WITH TIMBER ROTTING AS OF 1951, BUILDINGS AND EQUIPMENT VANDALIZED OR DESTROYED BY WEATHER.

Comments on development

  • 12 UNPATENTED CLAIMS STAKED IN 1919 BY J.H. CANN (APEX-EL NIDO MINING CO.). DRIVING OF TUNNEL STARTED IN 1920, MINING CONTINUED INTERMITTENTLY UNTIL 1939. 55 LODE CLAIMS ACTIVE AS OF 1977, ACCORDING TO USBM OFR 20-73

Reference information

Bibliographic references

  • Deposit

    USGS B 1058-E, P. 143, 200-202, PLS. 13, 14 (1959)

  • Deposit

    USGS B 773, P. 114-119 (1923)

  • Deposit

    USGS B 929, P. 143-145 (1941)

  • Deposit

    USGS OF 78-450, P. 8-11 (1978)

  • Deposit

    USGS MF-1476-B, P. 1, LOC. 4 (1982)

  • Deposit

    USBM OFR 20-73, LOC. 5 (1978)

  • Deposit

    USGS MF-467, LOC. 6 (1972)

  • Other Database

    BAG-B-1058-E-PL-13

General comments

Subject category Comment text
Deposit GOLD-BEARING QUARTZ VEIN IN FAULT IN AMPHIBOLITE MASS. VEIN STRIKES N 42 DEGREES-60 DEGREES E, DIPS 30 DEGREES-80 DEGREES NW, PLUNGES 50 DEGREES-60 DEGREES NE, AND IS TRACEABLE FOR LENGTH OF OVER 2000 FT., VERTICAL DISTANCE OF 600 FT. VEIN PINCHES AND SWELLS FROM SEVERAL INCHES TO 5 FT. WIDE, WITH AVERAGE OF 31 IN.. VEIN CONTAINS QUARTZ, ARSENOPYRITE, PYRITE, CHALCOPYRITE, GALENA, SPHALERITE, TETRAHEDRITE, TRACES OF SCHEELITE, AND FREE GOLD. OFFSHOOT VEINS EXTEND AT LEAST 700 FT. SOUTH. WALLROCK ADJACENT TO VEIN IS ALTERED AND CONTAINS DISSEMINATED SULFIDES AND GOLD. MANY SMALL QUARTZ VEINLETS AND STRINGERS BRANCH OFF OF THE MAIN APEX VEIN. FREE GOLD OCCURS ALONG FRACTURES AND SHEAR ZONES IN THE QUARTZ VEINS, AND AS VERY FINE PARTICLES UP TO PINHEAD SIZE DISSEMINATED IN THE QUARTZ.
Deposit NO MINING ACTIVITY SINCE 1939. FAULT SEPARATES APEX VEIN FROM EL NIDO VEIN TO THE SOUTH. MOST OF ORE IN APEX MINE BELIEVED MINED OUT. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey
Editor 02-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.

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.