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

Ptarmigan I

Occurrence in Alaska, United States with commodities Copper, Zinc, Silver, Gold, Lead, Molybdenum, Tin
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. Alteration
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10307888
Record type Site
Current site name Ptarmigan I
Alternate or previous names Ptarmigan II, R-2290

Geographic coordinates

Geographic coordinates: -157.20312, 64.39946 (WGS84)
Relative position The geologically similar Ptarmigan I, Ptarmigan II, and R-2290 occurrences are in area east and south of Totson Mountain. The coordinates are for the Ptarmigan I occurrence, which is at the approximate center of the area. Ptarmigan I is approximately 2 miles east of the summit of Totson Mountain and 1 mile north of Hill 2591. Ptarmigan II is approximately 2 miles southeast of Ptarmigan I, and 1 mile east-northeast of hill 2613. R-2290 is approximately 2 1/2 miles southwest of Ptarmigan I, and 2 miles south of Totson Mountain. The location is accurate within 5 miles.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nulato B-3(quadrangle 1:63,360 scale)

Nulato SE(quadrangle 1:100,000 scale)

Nulato C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Silver Secondary
Gold Secondary
Lead Secondary
Molybdenum Secondary
Tin Critical Secondary

Alteration

  • (Local) Iron-oxide alteration (gossan).

Nearby scientific data

(1) -157.20312, 64.39946
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Ptarmigan I, Ptarmigan II, and R-2290 are small, individual, gossan occurrences in about a 3-square-mile area. The country rocks in the area are Paleozoic to Proterozoic schist and quartzite (Patton and Moll-Stalcup, 2000). Ptarmigan I consists of scattered float of massive gossan and schist in rubble of quartz schist, dolomite, mica schist, and phyllite. Ten rock samples of the gossan material contained up to 290 ppm copper, 99 ppm lead, 1500 ppm zinc, 1.2 ppm silver, 25 ppb gold, 13 ppm molybdenum, and 10 ppm tin. Three soil lines in the vicinity of Ptarmigan I indicate weakly anomalous copper and gold values but no obvious trend (Flanigan, 1998). Ptarmigan II is a shear zone with gossan breccia that cuts a schistose micaceous quarztite. Twelve rock samples contain up to 595 ppm copper; soil samples are weakly anomalous in copper, silver, and gold (Flanigan, 1998). R-2290 is a limonitic ankerite-quartz boulder on a game trail near a stream. Although the source of the boulder was not found, gossan fault breccia occurs uphill, in quartz schist rubble. Several rock samples contain up to 500 ppm copper and 494 ppm zinc (Flanigan, 1998). Also see NL008, 009, and 011.
  • Age = Based on similarities to the Paw Print occurrence (NL009) and proximity to the Round Top (NL011) intrusion, the age of the deposit may be the same as the age of Round Top intrusion, about 73 Ma (Flanigan, 1998).

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Probably inactive

Mining district

District name Kaiyuh

Comments on the workings information

  • Workings / Exploration = These occurrences were discovered by Anaconda Minerals Company in 1980 (Flanigan, 1998).

Reference information

Bibliographic references

  • Deposit

    Flanigan, B., 1998, Genesis and mineralization of ore deposits in the Illinois Creek region, West Central Alaska: University of Alaska, Fairbanks, M.Sc. thesis, 125 p., 2 plates.

  • Deposit

    Patton, W.W., Jr., and Moll-Stalcup, E.J., 2000, Geologic map of the Nulato quadrangle, west-central Alaska: U.S. Geological Survey Geologic Investigation Map I-2677, 41 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Flanigan, 1998

General comments

Subject category Comment text
Deposit Model Name = Plutonic-related Cu-Zn?

Reporter information

Type Date Name Affiliation Comment
Reporter 07-AUG-01 Cameron, C.E. Northern Associates Inc.

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.