Uranium player GTI Resources is a quarter of the way through its 100 hole maiden drill program at the Thor ISR uranium project in Wyoming.

GTI says the results are encouraging, as typical economically viable in situ recovery (ISR) grade and Grade Thickness (GT) cut‐offs are: 0.02% (200ppm) uranium and 0.2GT or 3m at 0.02% (200ppm) uranium.

The results from Thor included 10 holes (42% of holes to date) returning a better than the minimum economic GT cutoff with an average of 0.68GT.

GTI Resources (ASX:GTR) says the results are in line with expectations and indicative of the high potential for economic ISR uranium mineralisation.

More results are expected ahead of Christmas, with the final results, conclusions and recommendations to be developed once the program wraps up in early 2022.

REDOX boundaries and potential host sands

The company says the geological and hydrogeological setting of the mineralisation appears to be conducive to ISR recovery – with the main host sand appearing to be continuous in the area and 100 feet below the water table.

There are at least three separate roll fronts present in the main host sand with additional sands positioned above and below the main sand unit showing at least trace mineralisation.

The company is aiming to identify REDOX boundaries and potential host sands in addition to defining the depth, thickness, grade and width of mineralisation across the REDOX front.

Ultimately, the drilling may enable estimation of Inferred mineral resources and/or an exploration target.

GTI Resources
Pic: Thor Project uranium drilling location map, Great Divide Basin, Wyoming USA.

Targeting Lost Creek-style mineralisation

GTI set out to find mineralisation similar to the nearby Lost Creek deposit which meets the typical criteria for sandstone hosted ISR uranium projects in Wyoming’s Great Divide Basin:

  • Grade greater than 0.02% (200 ppm) uranium
  • Grade x Thickness (GT) greater than 0.2 (3 metres at 200ppm)
  • Width of mineralisation above cutoff nominal 50 feet (15 metres) and nominal GT of 0.4

UR Energy’s (TSE:URE) Lost Creek ISR uranium deposit is reported to contain a remaining 13Mlbs of uranium at average grade of 0.048% (measured and indicated) at a cutoff GT of 0.2.3.




This article was developed in collaboration with GTI Resources Limited, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.