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MINFILE No 093K 078
|Name||HANSON LAKE, HAN, HAN 53, FIR, SHOVEL CREEK, CLEA, YARA, KIMURA, CYR, BYSOUTH||Mining Division||Omineca|
|Status||Showing ||NTS Map||093K06E|
|Latitude||54º 15' 24" N||UTM||10 (NAD 83)|
|Longitude||125º 00' 52" W||Northing||6013952|
|Commodities||Copper, Gold, Silver, Molybdenum, Zinc, Lead||Deposit Types||L04 : Porphyry Cu +/- Mo +/- Au|
|Tectonic Belt||Intermontane||Terrane||Cache Creek|
The Hanson Lake showing is located 15 kilometres north of Endako.
The area is underlain by a metamorphic complex comprised of metamorphosed equivalents of the Carboniferous-Jurassic Cache Creek Group and a gneissic complex of granodiorites and quartz diorites. These were intruded by Tertiary 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 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 acid breccias trending north 4) shear zone containing copper and gold in quartz diorite/amphibolite. Sulphides occur mainly as pyrite, chalcopyrite, sphalerite, molybdenite and galena.
During the 1960s and 1970s, a regional stream sediment reconnaissance programme was conducted in Hanson lake area by Endako Mines staff. Anomalous metals were found in streams draining into Hanson Lake from the north and south. A 2 kilometre 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 with subeconomic mineralization being locally intersected. In the mid 1970s, the property was acquired by Placer Dome and widely spaced diamond drilling was performed in 1977 and 1979 on monzonite targets south of Hanson Lake (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. A sample from drillhole 90-3 on the Bysouth zone across 22 metres assayed 0.123 gram per tonne gold and 0.17 per cent copper (Property File - Snapshot Review 1992, Cazador Explorations). Another sample from drillhole 90-4 on the Cyr zone across 33 metres assayed 23.6 grams per tonne silver (Property File - Snapshot Review 1992, Cazador Explorations).
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 475-482
EMPR GEM 1971-164; 1972-351; 1973-332
EMPR PF (Dept. of Mines Summary of Exploration and Development work,
1971-1973; Cazador Explorations Ltd. Prospectus July 11, 1988;
*Snapshot Review, 1992, Cazador Explorations)
GSC MAP 631A; 907A; 1424A
GSC MEM 252
GSC OF 2593, 3184
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13
GCNL #24,#48, 1989; *#246, 1990
N MINER Nov. 27, 1989; Apr. 2, 1990
Placer Dome File
Property Evaluation 1991
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