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Warner Bay Porphyry Prospect

Occurrence in Alaska, United States with commodities Molybdenum, Copper, Zinc
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10094053
MRDS ID A012452
Record type Site
Current site name Warner Bay Porphyry Prospect

Geographic coordinates

Geographic coordinates: -158.40911, 56.15261 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chignik A-2 NE(quadrangle 1:24,000 scale)

Chignik SE(quadrangle 1:100,000 scale)

Chignik(quadrangle 1:250,000 scale)

Federal lands

Far West, Incorporated(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-1053K, LOC. 11 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Molybdenum Primary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Sphalerite Ore
Hematite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Incomplete Alteration Of Amphibole To Biotite, Slight Chloritization Of Biotite And Rare Sericitic Alteration In Otherwise Unaltered Rocks

Analytical data

Result SURFACE SAMPLES: 0.0-0.7% MO, TRACE CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Chignik Formation;Hoodoo Formation;Tolstoi Formation;
    Rock description Chignik Formation;Hoodoo Formation;Tolstoi Formation;
    Stratigraphic age (youngest) Miocene
    Chronological age 6
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Tonalite
    Rock unit name Devil'S Batholith;Devil'S Batholith
    Rock description Devil'S Batholith;Devil'S Batholith
    Stratigraphic age (youngest) Miocene
    Chronological age 9.86
    Dating method K-Ar

Nearby scientific data

(1) -158.40911, 56.15261
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Closely Spaced Joint Set Trending N 45 W

Controls for ore emplacement

  • Fracture Control

Comments on the geologic information

  • DEVIL'S BATHOLITH IS A MULTIPHASE, MEDIUM GRAINED GRANODIORITE TO TONALITE PLUTON INTRUDED INTO A COMPLEX TERRANE CONSISTING OF OLDER MIOCENE ANDESITIC AND DACITIC HYPABYSSAL ROCKS CUTTING A SEDIMENTARY SEQUENCE OF CHIGNIK, HOODOO AND TOLSTOI FORMATION UNITS; BATHOLITH IS CUT BY LATE STAGE PEGMATITES; LAST INTRUSIVE PHASE EMPLACED CIRCA 6. M.Y. MIO DEVIL'S BATHOLITH K/AR AGES: 9.86 +/- .36 M.Y. (HBLINGDIOR), 10.08 +/- .14 M.Y. (HBLINTONNALITE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on development

  • EXPLORED BY 4 DRILL HOLES TOTALING 760 M IN THE MID-1960'S

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit CHALCOPYRITE AND MOLYBDENITE OCCUR ON JOINT SURFACES; VEINLETS SPACED 5-10 CM APART; HEMATITE-RICH VEINS WITH MINOR PYRITE, CHALCOPYRITE AND SPHALERITE ARE ALSO PRESENT
Deposit TONNAGE UNKNOWN; POSSIBLY LARGE BUT VERY LOW GRADE; SEE ALSO: WARNER BAY BRECCIA PIPE ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1986 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.