Table Mountain

Prospect in Alaska, United States with commodities Gold, Copper, Zinc

Geologic information

Identification information

Deposit ID 10001533
MRDS ID A012278
Record type Site
Current site name Table Mountain
Related records 10257312

Geographic coordinates

Geographic coordinates: -145.91795, 65.44666 (WGS84)
Relative position This location is approximately 3/4 km west of Table Mountain summit. The prospect is on black biotite schist that contains up to 140 ppm gold (Menzie and others, 1987). Table Mountain is located approximately 4 miles NE of Twelve Mile Summit along the Pinnel Mountain trail, in sec. 9, T. 7 N., R. 9 E.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Zinc Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Enargite Ore
Gold Ore
Pyrrhotite Ore
Sphalerite Ore
Biotite Gangue
Quartz Gangue
Tourmaline Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -145.91795, 65.44666

Comments on the geologic information

  • Geologic Description = The metamorphic rocks in the Table Mountain area belong to the quartzite and quartzitic schist unit of Foster and others (1983) and are composed of light gray quartzite, black biotite schist, fine-grained greenish-gray mafic rocks and light-greenish-gray calc-silicate rocks (Burack, 1983). Granite crops out over an area of only about 2 square km, but the distribution of contact metamorphosed rocks suggests that granite underlies much of the Table Mountain area at relatively shallow depths (Burack, 1983).? Menzie and others (1987), reported that the highest concentrations of gold (2.6 to 140 ppm) occur just west of Table Mountain in black biotite schist and in quartz veins adjacent to a fault zone (breccia in granite) that is intruded by a sulfide-bearing hypabyssal felsic dike. Gold was detected in lesser amounts (0.05 to 0.2 ppm) in country rocks adjacent to a granite pluton that crops out five km to the northeast of the black biotite schist. The occurrences contain pyrrhotite, arsenopyrite, minor chalcopyrite, and rare enargite and sphalerite (Menzie and others, 1987, p. 1).? the Table Mountain occurrences show traces of silver and low levels of tin in the hypabyssal dike and in an iron-stained sample of the breccia. Two samples of a quartz vein containing sulfides along the vein walls both contained high values of gold, arsenic, and copper. Antimony was detected in both samples (Menzie and others, 1987, p. 4).? In the occurrences in and adjacent to the granite, gold was detected only in the sulfide-bearing hypabyssal felsic dike. Silver and tin were detected in the dike and in the granite adjacent to the dike. A sample of this dike without sulfides contained detectable tin but not gold or silver. A sample of quartzite from adjacent to the pluton did not contain gold, silver, or tin in detectable amounts (Menzie and others, 1987, p. 4).? In 1986, Alaska Division of Geological and Geophysical Surveys collected samples of auriferous tourmaline-quartz veins and hornfelsed biotite-tourmaline schists from the Table Mountain area. Field work in 1987 showed that the biotite-tourmaline schists and tourmaline-quartz veins are present throughout much of the north side of Table Mountain and that they are not restricted to fault zones. The widespread distribution of these veins is attributed either to (1) remobilization from stratiform occurrences or (2) hydrothermal mineralization associated with nearby abundant felsite dikes. These widspread occurrences suggest that this area has significant lode gold potential (Smith and others, 1987, p. 6-15).? Claims were active in 1981, but type of work is unknown (Menzie and others, 1983).

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Circle

Comments on the workings information

  • Workings / Exploration = Surface rock samples taken. Claims were active in 1981 but type of work is unknown (Menzie and others, 1983).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012278
USGS Alaska Resource Data File ARDF CI057

Bibliographic references

  • Deposit

    Menzie, W.D., Foster, H.L., Tripp, R.B., and Yeend, W.E., 1983, Mineral resource assessment of the Circle quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-170-B, 61 p., 1 sheet, 1:250,000.

  • Deposit

    Menzie, W.D., Hua, R., and Foster, H.L., 1987, Newly located occurrences of lode gold near Table Mountain, Circle quadrangle, Alaska: U.S. Geological Survey Bulletin 1682, 13 p.

  • Deposit

    Smith, T.E., Pessel, G. H., and Wiltse, M.A., 1987, Mineral assessment of the Lime Peak-Mt. Prindle area, Alaska: Alaska Division of Geological and Geophysical Surveys Miscellaneous Paper 29, 712 p., scale 1:63,360.

Comments on the references

  • Primary Reference = Menzie and others, 1987.

Reporter information

Type Date Name Affiliation Comment
Reporter 14-SEP-98 C.J. Freeman Avalon Development Corporation
Reporter 14-SEP-98 J.R. Guidetti Schaefer Avalon Development Corporation
Reporter 14-SEP-98 Clements, A.S. Avalon Development Corporation