Borroloola - Base Metal Exploration
The primary exploration targets within the Borroloola Project area sedimentary zinc and lead deposits similar to the giant McArthur River Mine deposit, located south of the Project. Sandfire has delineated an area of high lead, zinc and silver prospectivity flanking the Emu Fault Zone, which extends some 100 kilometres through the property.
This deposit type and geological setting is similar to that of the giant McArthur Mine (HYC Deposit) which is located west of the EFZ and south of Sandfire’s Borroloola Project. McArthur River is one of the world’s biggest lead-zinc deposits with a primary resource of ~230 million tonnes at a grade of 13% combined lead and zinc.
Sandfire’s 14,200 square kilometre Project encompasses a 100 km length of the EFZ which has been sparsely tested for repetitions of the SEDEX-style base metal mineralisation. Sandfire’s regional program to date, including extensive airborne electromagnetic surveys has resulted in the definition of two key target areas within the northern section of the EFZ structure.
A drilling program was undertaken in the second half of 2010 to test two strong geophysical targets, Tawallah 1 (with a surface area of 2km2) and Tawallah 2 (with a surface area of 4km2).