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File Created: 16-Feb-2012 by George Owsiacki (GO)
Last Edit:  09-Apr-2012 by George Owsiacki (GO)

Summary Help Help

NMI
Name WKR, HASTINGS ARM Mining Division Skeena
BCGS Map 103P072
Status Showing NTS Map 103P12E
Latitude 055º 43' 59'' UTM 09 (NAD 83)
Longitude 129º 40' 39'' Northing 6176570
Easting 457458
Commodities Gold, Silver, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt Coast Crystalline Terrane Stikine, Plutonic Rocks
Capsule Geology

The WKR showing is located about 15 kilometres northeast of the north end of Hastings Arm, 30 kilometres southeast of Stewart.

The property geology is mostly covered by a section of siliciclastic and pelitic sediments of the Jurassic Hazelton Group. However, the west side of the property is underlain by a porphyritic quartz monzonite to monzonite intrusion of the Eocene Coast Plutonic Complex that is massive, blocky and non-foliated.

Sedimentary rocks consist of hornfels quartzite to siltstone and shale and very minor limestone. The sediments are generally gossanous, with pyrite and pyrrhotite common as disseminations and as blebs in the host and in fractures. Limestone is generally converted to marble near intrusive contacts and contains weak skarn with local concentrations of pyrite and pyrrhotite. There is an unusual conglomerate unit that contains pebble to boulder-sized clasts in a black, fine grained, strongly hornfelsed matrix. This unit is strongly gossanous and appears to be strongly sheared. Anastomosing shears seem to break up bedding, which imparts a clastic appearance in some spots. Overall, silicification of rocks is common, especially in quartzite, and which is, at least in part, a result of hornfels effects.

Bedding generally strikes close to north, with moderate to steep dips to the east and a strong 060 degree striking, steep cleavage. Wavy open folds are common, and one hinge measurement indicates a steep plunge to the northeast. The discordance of the cleavage and dominant bedding orientation suggests that there was more than one phase of deformation affecting these rocks.

Local silicification and quartz veining are common. The veining ranges from tiny veinlets to large (2 metre wide) veins. They are commonly vuggy with pyrite as blebs and disseminations to several per cent. Silicified rock is commonly dark, with dark hairline fractures and signs of brecciation. Moderate gold-arsenic mineralization is found associated with small, vuggy quartz veinlets cutting through silicified sedimentary rocks. A rock sample (458823) from a pyritic vuggy quartz vein yielded 0.78 gram per tonne gold, 4370 parts per million arsenic, 0.15 per cent zinc and 23.3 grams per tonne silver (Assessment Report 31418). The quartz vein strikes 300 degrees and dips 71 degrees northeast.

In 2009, MAX Minerals Ltd. carried out a program of geological mapping, prospecting and silt sampling on their Hastings Arm Project which covers the WKR, BF and Hit blocks of claims.

Bibliography
EMPR ASS RPT 31206, *31418, 31420
EMPR BULL 63
EMPR FIELDWORK 1988, pp. 233-240; 1990, pp. 235-243; 2005, pp. 1-4
EMPR MAP 8
EMPR OF 1986-2; 1994-14
GSC MAP 1385A
GSC OF 864; 3453

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