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File Created: 20-Apr-2021 by Karl A. Flower (KAF)
Last Edit:  20-Apr-2021 by Karl A. Flower (KAF)

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NMI
Name HANSON LAKE CENTRAL, BYSOUTH, CLEA Mining Division Omineca
BCGS Map 093K025
Status Prospect NTS Map 093K06E
Latitude 054º 15' 36'' UTM 10 (NAD 83)
Longitude 125º 03' 27'' Northing 6014403
Easting 365983
Commodities Gold, Silver, Copper Deposit Types L : PORPHYRY
I : VEIN, BRECCIA AND STOCKWORK
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

The Hanson Lake Central (Bysouth) occurrence is located at an elevation of approximately 1180 metres on an east-facing slope, north of Hanson Lake and approximately 10.5 kilometres east-southeast of the southeast end of Taltapin Lake.

The area is underlain by a metamorphic complex comprising metamorphosed equivalents of the Carboniferous to Jurassic Cache Creek Group and a gneissic complex of granodiorites and quartz diorites. These were intruded by Neogene to Paleogene intrusives. Basic to acid dikes and stocks are common. Lithologies include quartz monzonite, quartz porphyry, quartz feldspar porphyry, acid breccia, quartz diorite and amphibolite. Argillic and chloritic alteration is evident in the quartz monzonite. The other lithologies show strong argillic, silicic and sulfidic alteration.

Mineralization in the area consists of 1) fracture-filling copper and molybdenum in quartz monzonite; 2) silicified zones containing gold, silver, zinc and lead in quartz porphyry/quartz feldspar porphyry; 3) silicified zones containing zinc, lead, gold and silver in north-trending acid breccias and 4) a shear zone containing copper and gold in quartz diorite/amphibolite. Sulphides occur mainly as pyrite, chalcopyrite, sphalerite, molybdenite and galena.

The Bysouth zone is reported to comprise a narrow shear zone ranging in width from several centimetres to 50 centimetres in width. This shear, which cuts through massive to foliated melanocratic diorite, contains fragments of amphibolite. Chalcopyrite, bornite, and malachite staining are associated with the shear, with chalcopyrite forming blebs and masses up to 5 per cent of the composition. Mineralization is not restricted to the shear.

In 1989, trench 89-T-12 yielded 0.37 gram per tonne gold, 1.4 grams per tonne silver and 0.295 per cent copper over 70.2 metres (Assessment Report 19649).

In 1990, drilling on the Bysouth zone yielded intercepts of 0.101 and 0.199 per cent copper with 0.10 and 0.11 gram per tonne gold over 18 and 15 metres, respectively, in hole DH90-2 and 0.163 per cent copper with 0.12 gram per tonne gold over 22.4 metres in hole DH90-3 (Assessment Report 21187).

Work History

During the 1960s and 1970s, a regional stream sediment reconnaissance programme was conducted in the Hanson Lake area by Endako Mines staff. Anomalous metals were found in streams draining into Hanson Lake from the north and south. A 2- by 9-kilometre zinc-lead anomaly with locally high silver-copper and outlying areas of high copper-molybdenum was defined by soil sampling. Induced polarization and magnetic anomalies were tested by trenching and diamond drilling, which intersected subeconomic mineralization. In the mid 1970s, the property was acquired by Placer Dome and, in 1977 and 1979, widely spaced diamond drilling was performed on monzonite targets south of Hanson Lake (MINFILE 093K 081).

In the late 1980s and early 1990s, Cazador Explorations conducted geological mapping, rock sampling, geochemical and geophysical surveys and an extensive diamond-drilling program on the Hanson Lake property.

In 2004, Abel Exploration Ltd. completed a small program of lithogeochemical sampling of historical trenches on the Kimura and Cyr zones.

In 2006, G.W. Kurz restaked the area and completed a small program of soil and stream sampling south of Hanson Lake. In 2010, the area was restaked by John Chapman and KGE Management Ltd.

During 2012 through 2015, the area was examined by Stone Ridge Exploration Corp., who completed programs of prospecting; soil, till and rock sampling; structural analysis and a 288 line-kilometre airborne ZTEM and aeromagnetic survey.

In 2018, the area was prospected and sampled by J.B. Kreft.

Bibliography
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 475-482
EMPR GEM 1971-164; 1972-351; 1973-332
GSC MAP 631A; 907A; 1424A
GSC MEM 252
GSC OF 2593, 3184
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13

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