Avira Resources Limited (ASX: AVW) has intersected a 36m interval of massive sulphides within a 76m zone of disseminated to blebby magmatic sulphides in its recently completed exploration diamond drilling programme at the company’s Puolalaki Project located in Northern Sweden.
The drilling programme consisted of five diamond drill holes for a total of 1098.4m targeting magmatic nickel- copper sulphide mineralization within a gabbroic to ultramafic intrusion. Fixed-loop electromagnetic (FLEM) surveying in February identified five conductors that have now been drill tested.
The standout drillhole was PUO23002 testing EM target T2-Upper which was a shallow, complex conductor with a modelled conductance of 40,000S. PUO23002 intercepted disseminated matrix sulphides from the top of bedrock prior to entering a wide zone of massive sulphides from 16.7m downhole to 52.7m downhole.
Initial visual logging indicates the sulphide comprises a mix of pyrrhotite and chalcopyrite, with pXRF analyses indicating the presence of nickel, copper and cobalt within pyrrhotite-rich intervals, laboratory assays of sulphide intervals are currently pending.
Hole PUO23002 was ended in disseminated to blebby sulphide mineralization at 85.7m, after successfully testing the modelled EM conductor.
“We are extremely pleased with the success of this initial drilling programme at Puolalaki and are eagerly awaiting laboratory assays of the massive sulphide intervals to confirm the indications of nickel, copper and cobalt from pXRF analyses of the core,” Managing Director, David Deloub, said.
“We consider this early result a clear proof-of-concept for the project and are eager to push exploration of this magmatic sulphide system to fully realize the potential of the project.”
The four additional drillholes completed at Puolalaki intercepted zones of either disseminated matrix or blebby to stringer magmatic sulphides at target depths broadly anticipated from modelling of FLEM conductors. These results are not considered sufficient to explain the 10,000S to 20,000S modelled FLEM conductor plates at these targets and DHEM surveys of all five holes will be undertaken within the next week further identify additional follow-up drill targets though more defined EM signatures.
Drillhole PUO23003, targeting EM target T2-Lower which appears, from modelling, to sit in a down-dip position from EM target T2-Upper, intercepted disseminated matrix and stringer sulphides although not enough to sufficiently explain the modelled 20,000S FLEM conductor.
Drillhole PUO23005 was drilled to a depth of 602m, targeting a broad and extensive late-time FLEM response (target T5) possibly associated with a large conductor (10,000S) at >500m depth. Magmatic sulphide veins and disseminated matrix sulphides intersected at 531-543m are encouraging, but not considered sufficient to explain the FLEM conductor.
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