Drilling collaborations Final report EL 27526 Oortippra Project

Abstract

In March 2013 CKA Resources Pty Ltd submitted a successful application for collaboration with the NT Government to drill test a significant gravity target beneath the Georgina Basin Sediments (Anomaly F) at the Ooratippra Project. This target was interpreted as a possible Olympic Dam style IOCG gravity anomaly. A single diamond hole, CKAF0001, was drilled in 2013 to a total depth of 441m (hole initiated with mud rotary to 17.5m). A total of 13 diamond samples were taken. CKAF0001 commenced within pale limestone of the Arrinthrunga formation and intersected the Arthur Creek Formation at around 108m, then the pyritic black shale from 413m to 441 m (end of hole). Results from the 13 samples, selected from a zone of veining with trace galena and pyrite around 180m, have returned geochemically anomalous gold, molybdenum, lead and uranium. The gravity anomaly at anomaly F has not been tested and the hole has been stopped in basin stratigraphy. By comparing CKAF0001 with stratigraphy in CKAD0001 it is interpreted that the depth to basement may be within 100m of CKAF0001's current depth, which is 100m shallower than expected. The causative body for the target gravity anomaly may be intersected at this shallower basement interface depth or may be deeper within the basement at the original depth of 600m. The presence of kimberlitic pipes, MVT type deposits and IOCG mineralisation at the Ooratippra project has not been eliminated by this program but CKAF001 has provided significant insight into the analysis of the gravity anomalies in the region and the nature of the basin geometry.