| Main commodities | Ag; Cu; Sb |
|---|---|
| Ore minerals | azurite; chalcopyrite; malachite; tennantite; tetrahedrite |
| Quadrangle map, 1:250,000-scale | AR |
|---|---|
| Quadrangle map, 1:63,360-scale | D-2 |
| Latitude | 67.81 |
| Longitude | -156.76 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | Located west of Kavachurak Creek at approximately 2000 ft. (600 m) elevation in T. 28 N., R 9 E., Kateel River Meridian. Shown as locality 71 in Mayfield and Grybeck (1978) and accurate to within 2000 ft. (600 m). |
Geologic descriptionFour occurrences of Cu-Ag mineralization over 0.15 sq. mi. (200 m sq.) area. Most interesting occurrence is a fan-shaped area of mineralized talus ranging from 5 ft. to 10 ft. (1.3 m to 3 m) wide over a slope distance of 300 ft. (100 m) that consists of dolomite breccia containing masses of tetrahedrite, tennantite, chalcopyrite, malachite and azurite, mixed with fragments of quartz-vein material containing chalcopyrite. Other three occurrences are quartz veins generally 0.5 to 6 in. (1 cm to 12 cm) wide (one vein 1.5 ft. (0.3 m) wide) having strike lengths up to 75 ft. (15 m), and quartz stringer zones 40 ft. to 100 ft. (10.5 m to 30 m) wide, carrying tetrahedrite, chalcopyrite and malachite. Host rock is brecciated dolomite overlain by limestone and underlain by limestone, marble, and a sequence of phyllites; dolomite breccia forms prominent rust-colored hills (Degenhart and others, 1978, p. 351-371). | |
| Geologic map unit | (-156.762840035641, 67.8094801199612) |
|---|---|
| Mineral deposit model | Kipushi (Cox and Singer, 1986; model 32c)? |
| Mineral deposit model number | 32c? |
| Alteration of deposit | Fe-staining. |
| Workings or exploration | Two samples representative of mineralized dolomite breccia contained 18.6 percent Cu over 36 ft. (12 m) length, and 33.8 percent Cu over 50 ft. (17 m) length. One 4 to 6 in. (8 cm to 12 cm) wide quartz vein assayed 6.2 percent Cu, 0.62 percent Zn, 4.9 oz/ton (152g/ton) Ag, and 3.2 percent Sb. Another 40 ft. (13 m) chip sample across a stringer zone assayed 0.8 percent Cu, 0.48 oz/ton (15g/ton) Ag (Degenhart and others, 1978, p. 351-371). |
|---|---|
| Indication of production | None |
Additional commentsThree minor occurrences of malachite are present along the north slope of the mountain immediately southwest of Kav occurrence. All occurrences are located within Noatak National Preserve. | |
| MRDS Number | A011906 |
|---|---|
| Reporters | K.R. Leonard (USGS), R.L. Elliott (USGS), J.M. Schmidt (USGS) |
| Last report date | 10/26/1992 |