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File Created: 14-Dec-1988 by Garry J. Payie (GJP)
Last Edit:  04-Apr-2022 by Karl A. Flower (KAF)

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Name TARN CREEK, UNUK (ZONE 2), U2, UNUK 11, 12 Mining Division Skeena
BCGS Map 104B059
Status Showing NTS Map 104B09W
Latitude 056º 35' 01'' UTM 09 (NAD 83)
Longitude 130º 23' 17'' Northing 6271900
Easting 414750
Commodities Gold, Copper, Lead, Zinc Deposit Types I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The area of the Unuk (Zone 2) occurrence is underlain by rocks of the Upper Triassic Stuhini Group. Lower Jurassic Unuk River Formation of the Hazelton Group are mapped to the immediate west. A large gossanous area was located at an elevation of between 1370 and 1525 metres, immediately west of a large icefield.

In 1987 four rock samples were taken; one chip and three float samples, the latter apparently derived from the gossan. The samples were generally described as silicified volcanic rocks containing up to 30 per cent pyrite plus/minus chalcopyrite. The highest assay result was reported to be 0.995 gram per tonne gold. An average of the 4 samples was 0.296 grams per tonne gold (Assessment Report 17087).

In 1991, Granges defined the area as a roughly 50 metre wide by 300 metre long northeast-trending zone with sporadic carbonate alteration (orange weathering) and discontinuous north to northwest-trending quartz stringers and gash veins, east of Tarn Lake. These stringers are sporadically mineralized with pyrite, arsenopyrite, sphalerite and galena. The zone is hosted in a 5-7-metre-wide argillite to siltstone unit.

This area has subsequently been mapped, covered by magnetic and IP surveys, and tested by one drill hole. Chip sampling of the structure showed it to contain highly anomalous amounts of several metals with gold values up to 12.8 grams per tonne tonne across 1.0 metre (2.85 g/tonne across 5.3 metre). Drill hole T91-1 was drilled to test this structure (Assessment Report 22113). A quartz vein fault zone was intersected between 19.57 m and 20.40 metre and is probably the Tarn Creek showing. The structure contained traces of chalcopyrite, but was otherwise barren. Its gold content was not anomalous.

See AP (104B 083) for details of a common work history on the Unuk property.

EMPR ASS RPT *15961, *17087, *19675, 20390, 20933, 21749, *22113, 23910, 28338
EMPR PF (Geology Map - 1:31250 Scale: Newmont Exploration of Canada Ltd., 1960's)
EMPR EXPL 1987-C378
EMPR FIELDWORK 1987, pp. 199-209; 1988, pp. 241-250
EMPR OF 1988-4; 1989-10
EMPR PF (Geology Map - 1:31250 Scale: Newmont Exploration of Canada Ltd., 1960s)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
Gunning, M.H. (1986): Late Triassic to Middle Jurassic (Norian to Oxfordian) Volcanic and Sedimentary Stratigraphy and Structure in the Southeastern Part of the Iskut map sheet, Northcentral British Columbia; unpublished B.Sc. Thesis, University of British Columbia, page 85
Lindsay, D., Prowse, N.D. (2021-06-08): NI 43-101 Technical Report on the Sib-Corey-North Mitchell Property