The area of the Tat showing is underlain by intermediate to mafic volcanic rocks of the Upper Triassic Stuhini Group. Middle to Late Triassic quartz dioritic plutons intrude the country rock.
Intensely carbonate-altered volcanic rocks host minor quartz stringers containing less than 2 per cent pyrite, chalcopyrite, sphalerite, galena and arsenopyrite. A sample of this material assayed 7.99 grams per tonne gold, 19.17 grams per tonne silver, 0.49 per cent copper, 0.71 per cent lead and 0.83 per cent zinc (Assessment Report 22204).
Approximately 100 metres north to northeast and downslope, an outcrop occurs containing a 20 centimetre quartz vein hosting massive arsenopyrite and pyrite with trace amounts of sphalerite and galena. The vein, hosted in carbonate altered volcanics, is oriented at 180 degrees and dips 35 west. Strike length appears to be less than 10 metres. A sample assayed 26.98 grams per tonne gold, 48.0 grams per tonne silver, 0.07 per cent copper, 0.31 per cent lead and 0.52 per cent zinc (Assessment Report 22204).
A narrow (6 centimetre wide) silicified zone in monzonite porphyry yielded 0.22 per cent molybdenum, 0.03 per cent lead and 2.6 grams per tonne silver. The exposed monzonite is mineralized with pyrite and fracture controlled spotty molybdenite. This showing is about 1100 metres west of the gold-bearing polymetallic veins.
In 1991 field work by Maple Resources Corp on their Sure and Fate claims consisted of contour soil sampling (26.59 kilometres of line: 388 samples) along with geological mapping and prospecting. During mapping, samples of altered and mineralized float and outcrop were routinely taken (32 samples). Silt samples were collected where conditions were suitable (19 samples).
From late 2013 to date (February 2012) IMGM International Mining Canada Inc. held a large group of claims totalling 23,313 hectares that stretched west from Trapper Lake east to the Sheslay River and south from Kowatua and Tatsatua creeks. The exploration work was focused primarily on the Tat zone (104K 155). In 2014, IMGM collected 313 stream silt samples and 75 rock samples across their property.
In 2015 summer, Tat zone prospecting work defined a 0. 5 metre wide carbonate quartz vein with gold-silver and base metal mineralization observed trench. This vein host in andesitic tuff and tuffite undivided volcanic clastics unit, where carbonate, epidote and chlorite alteration occur. Beside this vein, a 50 to 80 meter wide south to north trending carbonate silica altered structure zone occurs just west. In this structure zone rock samples yielded gold bearing quartz vein at the north end and galena, sphalerite bearing carbonate vein at central zone and silver base metal bearing carbonate vein at south end.
In 2015 IMGM collected 31 rock samples and 467 soil samples on its Tats property. The 2015 geochemistry exploration work on Tat zone in Tatsemanie Lake property has identified gold, silver and base-metal anomalies in soil defining two prospective targets TatPro01 andTatPro02.
In 2016, a 3.4 kilometre IP survey was conducted on 3 lines over the Tats zone. The survey displayed a strong chargeable anomaly towards the northwest end of all three lines. It begins as a small, shallow, weaker anomaly and broadens into a deeper stronger towards the NW. The geochemistry exploration work on Tat zone in Tatsemanie Lake property has identified gold, silver and base-metal anomalies in soil and defined two prospective targets North Tat Trend and South Tat Trend. IMGM reported that this work defined large areas of copper, gold, silver, arsenic, antimony, bismuth, mercury, molybdenum and cadmium anomalies in soil, and rock geochemistry.
In 2016, 130 soil samples were collected on the Jason zone. Prospecting rock samples taken at Jason Zone is limited to just 8 samples, assay returned lower gold, copper and silver value, except from high arsenic values indicates arsenic rich alteration zone that shows red gossanous hill. Northeast trending near vertical banded quartz carbonate vein occurs within andesite in contact with monzonite porphyry. Rock samples from this vein yielded low gold and silver values. Disseminated pyrite in argillic sediment rocks also yielded gold and silver.
The 2017 exploration program of IMGM consisted of the collection of 19 rock and 27 soil samples at Tat zone and Jason zone in their Tatsamenie Lake Property. The geochemistry exploration work on the Tat zone identified gold, silver and base-metal anomalies in outcrops found in a north-south orientated creek where two northeast trending breccia zones up to 2 metre wide occur. Sample S228863, from a 2-metre wide altered and mineralized quartz breccia zone, assayed 2.95 grams per tonne gold, 12.25 grams per tonne silver and 0.22 per cent copper (Assessment Report 37497). This sample's location is reported as UTM 643064 metres east and 6482164 metres north.
In 2018 diamond drill hole TZK-18-401 intersected andesitic tuff, quartz breccia zone and, for much of its length, basalt. This hole revealed a strong propylitic alteration assembly of epidote, chlorite, silica and pyrite up to 10 to 15 per cent. Sheeted parallel pyrite quartz strings and veinlets cut through andesitic tuff and tuffaceous siltstone from 100 metres to 250 metres depth. Pervasive hematite dissemination occurs along most of the drill core. Late-stage calcite and iron carbonate alteration occur in veins and blebs overprinting existing propylitic alteration and locally overprinting sheeted pyrite strings zone. TZK-18-401 was located at UTM 642950 metres east, 6482098 metres north. Late-stage calcite and iron carbonate veining overprinted early stage propylitic alteration. Traces trace blabs and disseminated chalcopyrite are observed locally as blebs and disseminations with propylitic alteration. Assays of core samples resulted in moderate to strongly anomalous copper values throughout most of the hole. The strongest copper and gold values occurred in a quartz breccia, over 2 metres from 74.55 metres to 76.55 metres, which graded 0.039 gram per tonne gold, 8.2 grams per tonne silver, 0.069 per cent copper 0.068 per cent zinc and 0.0083 per cent lead, (Assessment Report 37706).
A 2019 Assessment Report reported that TZK-18-301 was located on a north-facing slope, near the south end of a strong copper-gold-in-soil anomaly, within a 2016 IP chargeability high. Total of 339 metres of NQ coring was completed in second diamond drill hole TZK-18-301 drilled from one site on the northwestern part of the Tat target, the drill program was on-going drill program after drill hole TZK-18-401. Trace chalcopyrite is associated with increase of silica alteration. Sheeted pyrite-rich quartz stringers are developed within basaltic and andesitic/siltstone unit from 5.6 metres to 212 metres depth, with pyrite ranging up to 10 per cent and chalcopyrite less than 1 per cent. Pervasive hematite dissemination occurs along most of the drill core. A 1.1 metre drill interval (111.65 to 112.75 metres depth) assayed 0.161 gram per tonne gold, 23.7 grams per tonne silver, 0.26 per cent copper, 0.82 per cent zinc and 0.04 per cent lead (Assessment Report 38398). A one metre drill interval (from 336 metres to 337 metres depth) containing epidote-chlorite andesitic-basalt and hosting disseminated pyrite and sphalerite, assayed 0.01 grams per tonne gold, 3.1 grams per tonne silver, 0.079 per cent copper, 1.13 per cent lead and 48 parts per million zinc (Assessment Report 38398).
See the nearby Vine (104K 075) for related geological and local work history details.
