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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  11-Jul-2020 by Karl A. Flower (KAF)

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Name MCTAGG CREEK, UNUK (ZONE 4), TAG Mining Division Skeena
BCGS Map 104B059
Status Showing NTS Map 104B09W
Latitude 056º 32' 48'' UTM 09 (NAD 83)
Longitude 130º 20' 13'' Northing 6267725
Easting 417800
Commodities Copper Deposit Types G04 : Besshi massive sulphide Cu-Zn
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

Host rocks of the Tag showing are weakly metamorphosed sedi- mentary sequences assigned an Upper Triassic age based on recent fossil evidence (Gunning, M.H., 1986). These rocks are now believed to be correlative with the Stuhini Group (Personal Communication, D.J. Alldrick, Jan. 1989).

Two small showings in McTagg Creek valley were originally recorded by Newmont Exploration Ltd. One consists of copper staining (malachite?) associated with quartz-sericitic and siliceous alteration, including jasper and pyrite, of argillaceous phyllite. The other consists of pyritiferous quartz stringers along fractures in similar rock (Newmont Map).

Later work by True North Minerals outlined a north trending alteration zone (Zone 4), within argillitic rock, composed of up to 30 per cent sulphides, mainly pyrite. The altered argillites are cut by quartz veins. Chalcopyrite was reported at one location. The highest assay came from a rusty quartz vein hosting fine-grained pyrite and contained 0.071 grams per tonne gold and 8.4 grams per tonne silver across a width of 10 centimetres. An average value of 14 samples taken is 0.017 grams per tonne gold and 2.1 grams per tonne silver (Assessment Report 17087).

In 1986 and 1987, Hi-Tec Resource Management Limited outlined a gold soil anomaly near the toe of the east McTagg glacier (Unuk 3 and 4 claims) but had no success in pin pointing the source. The McTagg River Valley is a freshly glaciated, steep-sided one with difficult access. It cuts across a moderately well-folded and faulted sequence of argillites, carbonates and occasional intercalations of felsic tuffs.

During the 1989 field season of Granges Inc, a moderate amount of success was achieved in tracing the gold soil anomaly up the east wall of the valley. They found that the anomalous soil values may be related to copper bearing shears in the sedimentary rocks on the east wall.

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

EMPR ASS RPT 15961, *17087, *19675, 20390, 20933, 21749, 22113, 23910
EMPR FIELDWORK 1987, pp. 199-209; 1988, pp. 241-250
EMPR OF *1988-4; 1989-10; *1991-21
EMPR PF (*Geology Map-1:31250 Scale-Newmont Exploration of Canada
Ltd., 1960)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
Cavey, G. (2008-11-14): Technical Report on the Iskut Project
EMPR ASS RPT 15961, *17087, *19675, 20390, 20933, 21749, 22113, 23910
EMPR EXPL 1987-378
EMPR FIELDWORK 1987, p. 199; 1988, pp. 241-250
EMPR OF *1988-4; 1989-10
EMPR PF (*Geology Map-1:31,250 Scale-Newmont Exploration of Canada
Ltd., 1960's)
GSC MAP 9-1957; 1418A
GSC P 89-1E, pp. 145-154
PERS COMM D.J. Alldrick
Equity Preservation Corp. (Stewart-Sulphurets-Iskut Compilation, Dec.
1988, Showing No. B36)
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, North-Central British
Columbia, Unpublished B.Sc. Thesis, University of British Columbia,
85 pages