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File Created: 22-Jun-1988 by Laura L. Coughlan (LLC)
Last Edit:  04-Jan-2021 by Del Ferguson (DF)

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NMI 104B10 Cu3
BCGS Map 104B056
Status Showing NTS Map 104B10W
Latitude 056º 33' 22'' UTM 09 (NAD 83)
Longitude 130º 51' 05'' Northing 6269500
Easting 386200
Commodities Copper, Lead, Zinc, Gold, Silver Deposit Types K02 : Pb-Zn skarn
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Lake Zone is a showing is on the south side of a small al lake (Crater Lake) in the headwater region of Snippaker Creek, approximately 20 kilometres southeast of the Bronson Airstrip on Iskut River.

The area is underlain by an undivided assemblage of stratified rocks comprised of fragmental volcanics interlayered with sequences of argillite, banded siltstone, greywacke, conglomerate and minor impure limestones. Most of these rocks are believed to be correlative with the Lower Jurassic Hazelton Group (Unuk River Formation), but some of the lowermost members may correlate with the Upper Triassic Stuhini Group rocks.

The stratified rocks are intruded by sub-volcanic intrusives and plutonic rocks related to the Coast Plutonic Complex that range from Upper Mesozoic to Cenozoic in age. These stocks and dykes include granodiorite, quartz monzonite, syenite and feldspar porphyry, as well as Tertiary dykes and plugs of basalt and diorite.

Propylitic alteration, consisting of chlorite, epidote, calcite and pyrite, is extensively developed within the Lake Ridge area. The most prominant propylitic alteration in Lake Ridge is in or near "orthoclase porphyry" bodies, in which 30 to 45 per cent of the orthoclase phenocrysts have been replaced by epidote and the groundmass contains traces of epidote, chlorite and calcite. The orthoclase porphyry is predominantly a porphyritic hypabyssal intrusive rock which varies in composition from granodiorite or quartz monzonite to syenite.

The porphyry intrudes an interbedded sequence of northeast dipping sedimentary and pyroclastic rocks. The sedimentary rocks are characterized by thinly laminated (1 millimetre to 2 centimetres) pyritic siltstones and shales with wider bands of greywacke. These are overlain by tuffs and lapilli tuffs of intermediate to mafic composition.

Varying degrees of sulphide-bearing skarn alteration is developed within the volcaniclastics and tuffaceous siltstones with the areas adjacent to the intrusives. Skarn alteration is best developed in the upper part of the volcaniclastic sequence and is comprised of massive, medium-grained chlorite, plus or minus diopside, with lesser amounts of quartz and epidote.

Mineralization consists of randomly oriented and discontinuous quartz-sulphide veins and veinlets ranging up to 0.5 centimetre in width. Sulphide mineralization consists of variable amounts of disseminated sphalerite, galena, chalcopyrite with associated malachite and coarse aggregates of pyrite.

In 1986, a sample from a rusty altered shear zone along the west side of the granodiorite intrusive assayed 0.48 gram per tonne gold and 2.8 grams per tonne silver (Assessment Report 15238). In 1987, a sample taken from a 30 centimetre wide pyrite-quartz vein within a sheared zone in the granodiorite assayed 0.265 gram per tonne gold and 0.1 gram per tonne silver (Assessment Report 16892).

To 1990, only narrow discontinuous quartz-sulphide veins had been discovered, samples of which yielded anomalous but uneconomic precious and base metal values. More substantial showings NG1 and NG2 were discovered in 1988 along northwest-southeast shears in the vicinity of orthoclase porphyry plugs. The NG1 showing (in the Lake zone area) is 130 metres long and 5 metres wide and consists of 3 to 5 per cent pyrite. Local pods of up to 30 per cent pyrite also occur. The NG2 showing is 1.2 kilometres to northeast and on the same northwesterly trending (120 degrees azimuth structure. The mineralization at the NG2 showing is similar but exposed over a shorter strike length. Samples taken in 1988 failed to return anomalous values.

Work History

The Kim 1-36 claims were held by Great Plains Development Company of Canada, Ltd. Work during 1972-1974 included reconnaissance geochemical soil and silt surveys, geological mapping, and a geochemical s o i l survey (98 samples) over 4 line-miles covering Kim 13-22, and 26.

Exploration in the Pins showing area located in the southern portion of property was first recorded in 1972 by Cobre Explorations. This work consisted of prospecting, geological mapping, soil geochemical surveys, magnetometer surveys and ground electromagnetic surveys.

The present Pelican Property was staked in 1982 by Mr. Chris Graf as part of the larger Gossan Property which extended a further 10 kilometres to the northwest. In 1983, Lonestar Resources Ltd. completed an extensive prospecting, regional mapping, silt sampling and soil sampling program over the entire Gossan Property (Assessment Report 11332). This program delineated five significantly anomalous areas.

In 1985, Western Canadian Mining Corporation signed an option agreement with Mr. Graf whereby Western Canadian could earn a 60 per cent interest in the Gossan Property. In 1987, Western Canadian completed a geological mapping and sampling program over portions of the Pelican Property; this including 903 soil, 23 silt and 304 rock samples (Assessment Report 16931).

In August 1988, Cathedral Gold Corporation signed an option agreement whereby Cathedral Gold Corporation could earn Western Canadian's 60 per cent interest in two separate portions of the Gossan Property. In 1988, Cathedral Gold completed a rock chip sampling-prospecting program during which 237 rock chip and 383 soil samples were taken. The results returned from this program include: 0.5 metre wide quartz vein the area within the present Southeast Grid which returned a gold value of 6.2 grams per tonne, a float sample from the Snow Grid area which returned 11 grams per tonne gold and mineralized float near the Pelican Grid samples of which returned gold values of up to 2.89 grams per tonne.

In 1989, Aerodat Ltd. was contracted to complete an airborne electromagnetic and magnetometer survey over the entire property. This survey totalled 386 kilometres in flight length and outlined several electromagnetic and magnetic anomalies worthy of follow-up.

In 1990, Cathedral Gold Corp explored Pelican (Gossan) property, including the Pelican, Southeast, Sericite - SJ, Pins, Snow and Lake, Pelican. They collected 494 soil and 240 rock samples and conducted 23.9 kilometres of ground electromagnetic surveying (VLF) and 1.1 kilometre of Induced Polarization (IP) surveying.

In 2006 and 2007, Hathor Exploration Ltd. completed a 7228.7 line-kilometre airborne geophysical survey on the area as the Georgia claims of the Iskut project. In 2008, Max Minerals Ltd. examined the property.

Colorado Resources' 2015 limited prospecting in the Lake Zone area returned results moderately to strongly anomalous in gold, silver, and copper (Assessment Report 35943) and limited rock sampling also occurred in 2016 and 2017 (Assessment Reports 36761, 37604).

EMPR ASS RPT 3981, 5752, *11332, 14972, *15238, *16892, *19002, 19241, *21365, *35943, *36761, *37604
EMPR EXPL 1983-525; 1985-C380-C381; 1986-C442-C443
EMPR GEM 1972-517; 1973-500; 1974-335
EMPR GF 2015-4
EMPR INF CIRC 2015-2, p. 105
EMPR OF 1989-10; 2004-2; 2006-2
EMPR P 1993-1, pp. 335-339; 2004-1, pp. 1-18; 2005-1, pp. 1-30; 2006-1, pp.1-3; 2015-1, pp. 41-58
EMPR PF (Graf, C. (1982): Report on Claims in the Snippaker Creek Area of British Columbia for Active Mineral Explorations, December 1982; Peterson, D.B. (1987): Report Gossan Gold Project, Liard Mining Division, Northwestern British Columbia for Western Canadian Mining Corporation, November, 1987)
GSC MAP 9-1957; 311A; 1418A
GSC P 89-1E, p. 145-154
GCNL #132, 1984
V STOCKWATCH Aug.26, 1988, p. 19
Anderson, R.G., (1988): A Paleozoic and Mesozoic Stratigraphic and Plutonic Framework for the Iskut Map area (104B), Northwestern British Columbia, pp. A1-A5, in Geology and Metallogeny of Northwestern British Columbia, Smithers Exploration Group, G.A.C. Cordilleran Section Workshop, October 16-19, 1988
Cavey, G. (2008-11-14): Technical Report on the Iskut Project
P REL (Colorado Resources & QuestEx Gold & Copper)