CanAlaska Uranium (CVE:CVV) optionee Cameco Corp.’s exploration team has completed two primary drill holes and two off-cut holes along the trend of the C10 conductor package on the West McArthur project in the Athabasca basin, Saskatchewan, the company said Monday.
The site is 2.4 kilometres and 3.5 kilometres southwest of a drill hole completed in April.
CanAlaska reported on progress at West McArthur in July. Read more.
The exploration team has focused on establishing the path of the C10 graphitic conductor package and the C10 fault structure as it trends southwest from the high-grade uranium mineralized zones at Fox Lake.
Two drill holes, located 2.4 kilometres and 3.5 kilometres southwest of the winter drill target (hole WMA035), focused on intercepting the fault structures and basement graphite horizons associated with the silicified and fractured sandstone previously drilled by CanAlaska in 2012. The previous drill holes had shown nearby conductive targets associated with above background uranium mineralization with up to 1,000 counts per second from geophysical probe results.
WMA036 was drilled 75 metres north of the WMA034 unconformity pierce point to test for the extension of the C10 fault at the unconformity. The drill hole intersected bleached sandstone. Two fracture zones are characterized by bedding controlled desilicification and broken core.
The targeted fault zone, intersected 100 metres above the unconformity (from 721.5 metres to 727.5 metres), is characterized by broken core, fracture-controlled limonite, steeply dipping clay-coated fractures and a 60-centimetre sandy-clay gouge.
Below the fault zone, from 730.9 metres onward, the sandstone is pervasively bleached. Dark green interstitial chlorite and strong patchy silicification is observed from 750 metres to 787.5 metres, centred on limonite and drusy quartz coated fractures from 754.2 metres to 777.7 metres, and is accompanied by dravite. Weak quartz dissolution to 810.4 metres is followed by three metres of strong silicification with minor chlorite and sooty pyrite.
The lowermost sandstone, from 787.5 metres to the unconformity at 821.8 metres, is bleached with diagenetic hematite bands. Weakly graphitic pelite was intersected in the basement at 840 metres and at 859.6 metres.
At the second drill site, hole WMA037 targeted the interpreted position of the C10 fault 70 metres north of the WMA028 unconformity pierce point. A brittle fault zone from 224.5 metres to 229 metres is associated with quartz dissolution, unconsolidated sand, local dravite and sooty pyrite. Strongly bleached sandstone continues through 358.5 metres to 423.1 metres. A brittle fault from 405.2 metres to 409.6 metres is characterized by moderate desilicification, clay-coated fractures and broken core. From 525.7 metres to 542 metres, broken core with steeply dipping clay-coated fractures, bedding- and fracture-controlled desilicification is intersected. Variably bleached sandstone continues below the fault zone, before the drill hole was abandoned at 732 metres.
WMA037-1 was an off-cut from the pilot hole at 516 metres. It intersected similar fractures and desilicified ground, but it was also abandoned at 747 metres.
WMA037-2 was an off-cut from the pilot hole at 372 metres. The sandstone below 500 metres is bleached with diagenetic hematite bands and limonite Liesegang rings and dravite occurs sporadically from 678 metres to the unconformity.
The unconformity was intersected at 807.3 metres. Immediately below the unconformity, pelitic metatexite was intersected to 848.1 metres. It is interpreted that the clay gouge at 839.5 metres represents the up-dip projection of the targeted lower fault intercepted in Canalaska’s drill hole WMA028. The fault zone with associated desilicification around 535 metres in WMA037, WMA037-1 and WMA037-2 is interpreted to represent the up-dip projection of the upper fault in the basement of WMA028, where CanAlaska intercepted 1,200 counts per second related to uranium mineralization just above the unconformity.
Canalaska and Cameco are exploring the West McArthur uranium project under a $12.5-million agreement, which includes drill testing of the grid 5 and grid 1 conductor packages. The project covers 35,830 hectares (88,536 acres) commencing six kilometres (four miles) northwest of Cameco’s majority owned McArthur River uranium mine. Importantly, West McArthur is immediately adjacent to Cameco’s recently disclosed Fox Lake uranium discovery with reported inferred resources of approximately 68.1 million pounds based on 387,000 tonnes at 7.99 per cent triuranium octoxide.
The Fox Lake discovery is within the Read Lake project operated by Cameco (Cameco — 78.2% and Areva — 21.8%).
“The summer drill program gives us further encouragement for additional uranium mineralization along the path of the C10 conductor. These drill holes tested targets in a mineralized system, which trends for approximately eight kilometres to nine kilometres southwest of the high-grade uranium mineralization reported at Fox Lake,” said CanAlaska President Peter Dasler.
This is a very robust mineralized system, and we are seeing evidence of more alteration surrounding the C10 fault structures. We are now looking forward to more drilling along the C10 conductor and whether the anticipated winter program will also include drill testing of the grid 1 conductor package. There is a lot of opportunity on this property.”
Story by ProactiveInvestors