The Project is located on agricultural land 20km south of the township of New Norcia, 100km northeast of
Cassini Managing Director, Mr
Encouraging Results at Ovis Prospect Continue
Two diamond drill holes were completed at Ovis Prospect. Drill hole YAD0010 intersected multiple narrow, massive to semi-massive sulphide zones with peak grades of 1.96% Ni and up to 1.81g/t combined PGE within a 35m-wide disseminated sulphide zone. Although the host intrusion is sulphiderich, as demonstrated in the ASX release of
New Search Space Untested by Previous Exploration
A more significant development is the latest interpretation and greater understanding of the geology and mineralisation at both prospect and regional scales.
A review of company and historical drilling, as well as magnetic and electromagnetic data, has found that the Yarabrook Hill area represents only a small portion of a much larger mafic-ultramafic intrusion. Yarabrook Hill has been the main focus of exploration as this is where the intrusion outcrops and weathering processes have enriched PGE mineralisation. Contrary to historical narrow, folded geological model, the intrusion appears to be a flat sheet, at least 330m thick, which dips gently easterly from Yarabrook Hill under shallow country rock sequences. In detail however, the intrusion shows very complex variations in rock types and chemistry over short distances. The eastern part of the intrusion remains untested by drilling and airborne EM and is likely to be a more prospective part of the system, given that Ni-Cu tenors increase from west to east i.e. Brassica to Ovis. The Company has identified a circular magnetic anomaly, known as 'Yenart', some 4km to the east of Ovis, which may represent a near surface exposure of the same intrusive system.
The upper-most part of the intrusion is a thick sulphide-bearing unit, indicated by Cu values >500ppm (and mostly > 1000 ppm), that ranges in thickness from 70m to 190m. Mineralisation intensity varies considerably over short intervals, which has been observed at the Ovis and Avena Prospects, but is generally stronger near the hanging wall contact, although this is not clear if it is due to primary mineralisation processes or secondary metamorphic and structural overprints.
The core of the intrusive complex can be mapped as a gravity anomaly and appears to have approximate dimensions of 18km x 5km. The exposed portion of the intrusion at Yarabrook Hill represents only 2% of the potential full intrusion area defined by the gravity anomaly. Cassini's AEM survey covered only 11% of the aerial extent of this anomaly. Most bedrock drilling in the project has only occurred at Yarabrook Hill with very little bedrock drilling beyond this area. Therefore the majority of this highly prospective intrusion has not been subjected to any form of exploration.
The Brassica Prospect is now interpreted as a distal and less dynamic part of the intrusive system, albeit with a significant volume of low-tenor sulphide deposition. Brassica is approximately 4km west of the exposed portion of the main intrusion and does provide insight to the scale of the intrusive complex.
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