2018 Final report EL 27526 for the reporting perod 3rd March 2010 to 2 March 2018 Ooratippra Project

Abstract

EL 27526 was the last remaining tenement in the Ooratippra Project, it was granted on 3 March 2010 and surrendered on 2 March 2018. EL 27526 was 100% owned by CKA Resources Pty Ltd. It was purchased from Equator Resources in 2011 with transfer approved 31 October 2011. In 2010 the previous owner of the Ooratippra project, Acaica, applied for and was awarded funding as part of a 'bringing forward discovery' geophysics collaboration with the NT Government for the Ooratippra project. The application proposed to test the Ooratippra basement gravity anomaly which is considerably stronger than those at Prominent Hill and Olympic Dam in South Australia. Over 3 subsequent years, geophysical gravity surveys were completed, commencing with a 1km spaced survey over the whole project, followed by 200m and 400m spaced surveys over anomalies A, B, F and D. Analysis of the gravity surveys was completed by Frank Lindeman of Lindeman Geophysics Pty Ltd who named significant anomalies A through to V, and later by Duncan Cowan who assessed it for indications of kimberlites. Also, an exploration assessment was completed by a consultant exploration geologist for the whole project. Over the period of tenure, two more collaboration applications with the NT Government were submitted and granted. The collaborations were for the drilling of deep diamond holes at priority gravity anomalies D and F (IOCG residual gravity targets beneath the Georgina basin sediments). CKAD001 intersected basement at 600m and assay results returned low order anomalous multielement values at the cover-basement interface where diatreme like breccias were noted. Subsequent diamond indicator analysis of the breccias at this interface returned G9 and G10 pyropes. The second diamond drill hole, CKAF001, was drilled to 813.1m, intersecting basement at 694.5m. Four significant breccia units were noted in the lower parts of the Georgina sediments with clasts up to 3cm in diameter as well as smaller greenish clasts of possible mafic/ultramafic origin. Diamond indicator analysis returned a number of ultramafic G9 pyropes from some of these breccias in hole F. Based on the findings from holes CKAD001 and CKAF001 a diamond specialist (John Towie) was flown to Alice Springs to inspect the holes. John Towie strongly supported the theory that the breccia is associated with a nearby kimberlite pipe and that CKAD001 is near the termination of injection (within 300m). CKA Resources is excited by the discovery of kimberlitic indicator pyropes and chromites in both of its exploration diamond holes, more than 6km apart. The presence of G10 pyropes is especially exciting indicating the project was once over a diamond stability field. The visit by diamond specialist John Towie has strongly supported the theory that the breccia intersected in CKAD01 is kimberlitic in nature, intruded after basin sedimentation and is within 300m of a diamondiferous kimberlite pipe. Based on the work completed during the duration of the tenure it is interpreted that the Ooratiprra project is situated over a kimberlite field with multiple pipes - some of which are diamondiferous (presence of G10 pyropes). It has not been determined whether these pipes were intruded post/syn or pre-basin formation. This significant discovery is a testimony to the character, persistence, contagious enthusiasm and undauntable exploration curiosity of Nick Byrne, owner of the CKA Resources, who passed away late 2016.