1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (Burroughs Bay )

Prospect in Alaska, United States with commodities Molybdenum, Uranium
Map
XML
JSON
KML
C
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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001556
MRDS ID A012303
Record type Site
Current site name Unnamed (Burroughs Bay )
Related records 10160890

Geographic coordinates

Geographic coordinates: -131.29873, 55.99365 (WGS84)
Relative position This prospect is at sea level on the north side of Burroughs Bay, about 4.2 miles northwest of Pt. Whaley. The site is in section 11, T. 68 S., R. 91 E., of the Copper River Meridian. It corresponds to loc. 26 in Elliott and others (1978). The location is accurate within a few hundred feet.

Site location context

Political divisions (FIPS codes)

Prince of Wales-Hyder(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Ketchikan NW(quadrangle 1:100,000 scale)

Ketchikan(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Misty Fiords National Monument Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Misty Fjords National Monument Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Molybdenum Primary
Uranium Secondary

Materials information

Materials Type of material
Molybdenite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Pyritization and silicification.

Mineral occurrence model information

Model code 80
USGS model code 21b
Deposit model name Porphyry Mo, low-F

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -131.29873, 55.99365
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the area of this prospect include a Cretaceous foliated quartz diorite batholith; metamorphic roof pendants in the batholith; and a Miocene granite and quartz porphyry stock and associated dikes that intrude the batholith and the metamorphic rocks (Berg and others, 1978, p. 12-13; Berg and others, 1988, p. 23). The outcrop area of the stock and associated dikes is about a square mile. The deposit is in the Miocene granite and quartz porphyry and consists of molybdenite-bearing quartz fissure veins and molybdenite coatings on fracture surfaces, and of veins and disseminations of pyrite (Berg and others, 1978, p. 12-13 and table 2). Analyses of several samples of molybdenite-bearing quartz porphyry dikes showed up to 100 ppm Mo and traces of U (Koch and Elliott, 1978 [OFR 78-156A]). The mineralogy, hostrock, age, and setting indicate that this is a porphyry molybdenum deposit similar in type and origin to the much larger one at Quartz Hill (KC105).
  • Age = Miocene.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Ketchikan

Comments on the workings information

  • Workings / Exploration = The deposit has been examined by private interests, but none of their findings have been made public. A grade of 0.06% molybdenite has been reported (Eakins and others, 1983, p. 46).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Berg and others, 1978 (OFR 78-73M); Koch and Elliott, 1978 (OFR 78-156A)

General comments

Subject category Comment text
Deposit Model Name = Porphyry molybdenum, low-F (Cox and Singer, 1986; model 21b)
Deposit Other Comments = Also see Quartz Hill (KC105).

Reporter information

Type Date Name Affiliation Comment
Reporter 29-JUN-1999 H.C. Berg 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.