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Boundary Creek Occurrence

Occurrence in Alaska, United States with commodities Molybdenum, Silver, 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. Economic information about the deposit and operations
  10. Mining district
  11. Land status
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10001738
MRDS ID A012522
Record type Site
Current site name Boundary Creek Occurrence
Related records 10112559

Geographic coordinates

Geographic coordinates: -133.8484, 58.64615 (WGS84)
Relative position CREST OF CIRQUE AT HEAD OF BOUNDARY CR., 8.5 MI N OF TAKU R. AND 3.5 MI W OF BORDER

Site location context

Political divisions (FIPS codes)

Juneau(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Taku River C-6(quadrangle 1:63,360 scale)

Juneau NE(quadrangle 1:100,000 scale)

Taku River(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

  • BEST LOCATION: USGS CIRC 615, P. 14, FIG. 10, SAMPLES ACF 459 AND ACF 460 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
Silver Primary
Copper Secondary

Materials information

Materials Type of material
Molybdenite Ore

Analytical data

Result SAMPLE ACF 459, COMPOSITE CHIP SAMPLE OF IRON-STAINED ROCK WITH VISIBLE MOLYBDENITE: 1000 PPM MO, 9.6 PPM AG, 300 PPM CU
Result SAMPLE ACF 460,GRAB SAMPLE WITH VISIBLE MOLYBDENITE: 1000 PPM MO, 0.9 PPM AG, 7 PPM CU
Result USGS CIRC 615, P. 15, TABLE 2

Host and associated rocks

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

Nearby scientific data

(1) -133.8484, 58.64615
ListMap

Economic information

Comments on the geologic information

  • COUNTRY ROCK IS METAMORPHIC TERRANE OF MESOZOIC (?) SCHISTOSE BIOTITE HORNFELS, HORNBLENDE HORNFELS, CALC-SILICATE HORNFELS AND MINOR MARBLE, FOLDED ABOUT N TO W TRENDING AXES AND CUT BY CRETACEOUS (?) TONALITIC INTRUSIVES AND A LARGE DIKE-LIKE BODY OF TERTIARY (?) APLITE AND ALTERED GRANODIORITE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1967
Discoverer Dave Brew (Usgs), Art Ford (Usgs)

Mining district

District name Juneau

Land status

Ownership category National Forest

Comments on development

  • DISCOVERED AUG. 5, 1967 DURING GEOLOGIC FIELD STUDIES OF THE JUNEAU ICEFIELD AREA CONDUCTED BY USGS PERSONNEL

Reference information

Bibliographic references

  • Deposit

    USGS CIRC 615, P. 12-15

  • Deposit

    USGS OFR 85-717, P. 311, NO. T002

  • Other Database

    BAG-OFR-85-717-T002

General comments

Subject category Comment text
Deposit DATA ARE NOT ADEQUATE TO ASSESS ECONOMIC POTENTIAL; FURTHER STUDY WARRANTED ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit 100 FT WIDE ZONE OF INTENSELY IRON STAINED APLITE CONTAINING LOCALLY VISIBLE PYRITE AND MOLYBDENITE IS EXPOSED OVER 300 FT SLOPE DISTANCE; WITHIN A LARGE DIKELIKE BODY OF APLITE AND GRANODIORITE AT LEAST 2 MI LONG AND EXPOSED OVER A 2000 FT VERTICAL DISTANCE; SAMPLED AREA WITH VISIBLE MOLYBDENITE IS 6 FT WIDE, EXPOSED FOR VERTICAL DISTANCE OF 12 FT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1985 Leonard, Kenneth R. (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.