Current Lake Intrusion
Between 1993 to 2000, most of the exploration on the Current Lake project was completed by local prospectors and consisted of general mapping, lithogeochemistry, soil sampling, and ground magnetic surveys.
The bulk of the exploration completed on the Current Lake deposit occurred from 2005 and on whenMagma Metals optioned the 26 claim Current Lake Property in 2005 and the Beaver Lake claim in 2006. Magma Metals was taken over by Panoramic Resources Limited in June 2012. Work completed by Panoramic included a number of airborne and ground geophysical surveys, geological and structural mapping, petrological, baseline environmental studies. Between December 2006 and December 2012, Magma/Panoramic drilled 801 core drill holes (185,516m) on the property.
A first-time historic mineral resource estimate was completed by SRK Consulting Ltd (SRK) in 2009. An updated historic mineral resource was calculated in late 2010 and a Preliminary Economic Evaluation was completed in February 2011 by AMEC Americas (AMEC). In January 2021, Clean Air Metals announced an updated 43-101 resource estimate.
Steepledge Lake Intrusion
Rio Tinto staked the Escape Lake block in 2006 and performed successive rounds of limited diamond drilling between 2010 and 2012. These programs yielded impressive drill intercepts highlighted by drill holes 12CL0009 and 11CL0005. High-grade intercepts from these programs included an intercept of 33.4m at 7.28gpt Pt+Pd+Au and 2.26% Cu+Ni.
Between 2014 and 2016 Rio Tinto completed outcrop and boulder prospecting throughout the Thunder Bay North Property and reprocessed all Magma Metals/Panoramic geophysical data under an Earn-In JV agreement dated 2014. During 2015 and 2016 Rio Tinto drilled 24 core holes (~9500m) into the Project with 7 holes (2418m) drilled into the TBN Property and 17 holes (7081.04m) into the Escape Lake Property. In late 2016 Rio flew a semi-airborne HeliSAM survey over the Current Lake and Steepledge Lake intrusions.