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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  21-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name ANT 1, LEFTY 1, LEFTY, EL TORO Mining Division Omineca
BCGS Map 093L033
Status Prospect NTS Map 093L06W
Latitude 054º 23' 25'' UTM 09 (NAD 83)
Longitude 127º 28' 30'' Northing 6028017
Easting 599022
Commodities Copper, Silver, Zinc, Gold Deposit Types L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Ant 1 showing of the Lefty property is dominantly underlain by a north-easterly striking sequence of andesitic to rhyolitic volcanic rocks of the Lower Jurassic Telkwa Formation (Hazelton Group). The Telkwa Formation has been locally subdivided into andesitic ash tuff and lithic-crystal tuff, and rhyolite flow units comprising k-spar and quartz porphyritic rhyolite with minor ash-lapilli tuff. The rocks are generally weakly fractured and propylitized. Quartz veinlets and patches occur locally.

The volcanic strata are intruded by a fine to medium grained, grey-pink plagioclase-feldspar porphyry sill approximately 1400 metres long by 400 metres wide.

In the eastern half of the Ant 1 claim, a northeasterly trending zone of weak to strong quartz-sericite alteration crosscuts andesitic ash tuff and rhyolite flow units. The zone is exposed in scattered outcrops over an area approximately 1000 by 200 metres. Outcrops are strongly fractured to locally weakly brecciated and contain numerous gouge zones. Malachite, azurite, tetrahedrite, chalcopyrite, sphalerite and bornite occur as fracture fillings, in quartz veins, disseminations and in quartz breccia over an undetermined width within the alteration zone.

A 1990 drill intersection of a strongly brecciated zone (shear?) with quartz-chalcopyrite-tetrahedrite-sphalerite, between 20.1 and 23.6 metres, averaged 0.65 per cent copper, 44 grams per tonne silver, 0.32 gram per tonne gold and 1.05 per cent zinc (Assessment Report 21925, page 12).

WORK HISTORY

In 1971, geological and soil geochemical (339 samples) surveys and 130 metres of trenching by Granby Mining Co. Ltd. on the Wolverine showing, delineating breccia veins with chalcopyrite (Geology, Exploration and Mining 1971).

In 1987, prospecting, mapping, magnetometer and VLF-electromagnetic surveys, and excavator trenching by Atna Resources Ltd. on Ant showing with discovery of a 3 by 0.6 kilometre epithermal system with values up to 4.1 grams per tonne Au across 0.6 metres on Lefty 1 (Assessment Report 21925).

In 1990, mapping and soil geochemical and induced polarization surveys by Atna Resources Ltd resulted in discovery of an 800 metres long shear zone with associated copper-silver-gold mineralization on Ant 1, which was followed by 1100 metres of diamond drilling in 7 holes. The drill program intersected a phyllic altered zone related to a major northeast trending shear zone with minor chalcopyrite, sphalerite and tetrahedrite (Assessment Report 21925).

The 2008 El Toro program of Lions Gate Energy Inc involved mapping, prospecting, 87 rock and 15 soil geochemical samples, GPS surveying of previous diamond drill hole collars, and underground and surface workings, an evaluation of the property (Assessment Report 30731), followed by a 1495 line kilometre airborne magnetic and electromagnetic geophysical survey (Assessment Report 30982). The survey on the West block covered Princess (093L 061), War Eagle (093L 062), Evening (093L 064), Duchess (093L 066), Countess (093L 067), MSJ (093L 241), Ant 1 (093L 320). In 2008, a sample (14473) assayed 0.084 per cent copper and 28.2 grams per tonne silver (Pautler, J. (2009-07-15): Technical Report on the El Toro Project).

Refer also to King (093L 041) for general information on the El Toro property, a large property that was worked by Lions Gate Energy Inc from 2007 to present (2015) and encompassed a very large area including the Starr Creek area that contains the MSJ (093L 241), Wolverine (093L 189), Ant 1 (093L 320) and Lefty areas.

Bibliography
EMPR ASS RPT 17868, 20741, *21925, 29456, *30188, *30731, *30982, *31515, 33275, 34445
EMPR MAP 69-1
EMPR OF 1990-5; 1994-14
EMPR PF Placer Dome (unknown (1990): Diamond Drilling Logs)
GSC BULL 270
GSC OF 351
Placer Dome File
*Pautler, J. (2009-07-15): Technical Report on the El Toro Project
EMPR PFD 860209, 681459, 681472

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