Eastern Athabasca Basin, Saskatchewan, Canada
Unconformity related sandstone and basement hosted uranium
- Geiger is located 13 kilometres northwest of IsoEnergy’s Radio property near several uranium deposits, mines and mills
- The Roughrider and Midwest deposits are both within 20 kilometres of the Property, as is AREVA’S McClean Lake uranium mine and mill
Geologically Geiger is located adjacent to the Wollaston-Mudjatik transition zone - a major crustal suture related to most of the major uranium deposits in the eastern Athabasca Basin. Sandstone cover at the Property is relatively thin and ranges between 101 metres and 358 metres in previous drilling. The basement geology is comprised of graphite bearing pelitic metasediments, pegamtite dykes bounded by granitic domes.
A total of 56 historic drill holes were completed at Geiger along 20 kilometres of graphitic conductors. The historic drilling intersected high-grade basement hosted uranium mineralization. Drill hole HL-50 intersected 2.74% U3O8 over 1.2 metres in the basement on the H11 South conductor. Additionally, historic drill hole HL-48 intersected 0.18% U3O8 over 0.6 metres above the unconformity along the H11 North conductor. Numerous untested gaps up to 1,000 metres long are present on the majority of the conductors on the Property. Many areas within the Geiger property remain underexplored, including the Q23 North, Bent Lake, and Q24 areas, and work in these areas should include ground geophysical surveys and subsequent diamond drilling.
IsoEnergy’s first drill program on the property was completed in the winter of 2018. The program successfully extended known mineralization in two locations on the H11S conductor. Drill hole GG18-09 was the highlight of the program and was designed to evaluate extensions of basement hosted uranium mineralization in historic drill hole HL-50.
The uranium mineralized interval in drill hole GG18-09 is relatively thick and straddles the sub-Athabasca unconformity. Within a 19.3 metre interval of elevated radioactivity, a 15.0 metre interval (207.0 to 222.0 metres) averages 0.03% U3O8, 2,600 ppm Cu, 998 ppm Ni, 943 ppm Zn and 2.4 g/t Ag. This broad interval includes individual samples with up to 14,700 ppm Cu, 3,130 ppm Ni, 407 ppm Co, 3,670 ppm Zn and 6.4 g/t Ag. A second, narrower zone of uranium mineralization was intersected deeper in the basement. It consists of a 0.7 metre interval that averages 0.02% U3O8 and 795 ppm Cu from 251.8-252.5 metres.
Mineralization in drill hole GG18-09 was followed up with a summer drilling program completed in July, 2018. Although some weakly elevated radioactivity and indicative alteration was intersected in the vicinity of drill hole GG18-09, no significant uranium mineralization was intersected at the Geiger property. Numerous other drilling targets remain on the Geiger property