Prospect in Alaska, United States with commodity Jade

Geologic information

Identification information

Deposit ID 10000739
MRDS ID A011378
Record type Site
Current site name Patten

Geographic coordinates

Geographic coordinates: -143.64457, 62.93163 (WGS84)
Relative position Best location: Richter, 1967, ADGGS GR30, Plate 2, loc. 7. Accurate within 100 ft radius
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Geographic areas

Country State
United States Alaska


Commodity Importance
Jade Primary

Materials information

Materials Type of material
Nephrite Ore
Chlorite Gangue
Serpentine Gangue
Tremolite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -143.64457, 62.93163

Comments on the geologic information

  • Geologic Description = Nephrite associated with tremolite in 100 to 200 ft wide band of alpine-type ultramafic complex consisting of serpentine-chlorite schist and massive serpentinite containing abundant rodingite inclusions. Site is near Mentasta Pass just north of Denali fault.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Tok; Mentasta Pass

Comments on the workings information

  • Workings / Exploration = Type of workings: surface

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011378
USGS Alaska Resource Data File ARDF NB004

Bibliographic references

  • Deposit

    Richter, D.H., 1967, Geology of the upper Slana-Mentasta Pass area, south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 30, 27 p., 1 sheet, scale 1:63,360.

  • Deposit

    Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.

Comments on the references

  • Primary Reference = Richter, 1967, ADGGS GR30

General comments

Subject category Comment text
Deposit Model Name = lode, metamorphic
Deposit Other Comments = Deposit has yielded a number of pounds of semiprecious stone over the past 10 years (USGS MF-655K). Other deposits of jade in the ultramafic rocks of the quadrangle appear likely.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 05-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 05-FEB-1997 Richter, D.H. U.S. Geological Survey