by Greg Klein | August 29, 2016
Preparing for an upcoming drill campaign, Aurvista Gold TSXV:AVA announced results of an extensive geophysics program over the Abitibi-region Douay project on August 29. Among results of previous geophysics were EM anomalies consistent with massive sulphides known elsewhere in the Abitibi, Aurvista stated. This time Douay underwent airborne magnetic, time-domain electromagnetic and radiometric surveys.
Work focused on the central and western portions of the 14,500-hectare property. The TDEM survey outlined seven strong anomalies associated with the strongest previous EM anomalies. The most significant sits proximal to the gold-bearing Main, South and Adam porphyries, with nearby chlorite-sulphide bearing feeder pipes like those “typically found in association with massive sulphide mineralization, yet to be found at Douay,” the company stated.
Aurvista has its team re-logging previous core from 26 sections across Douay to define chemical signatures and alteration mineralogy, and to confirm the suspected source of the volcanic intrusion. With 45,000 metres out of nearly 200,000 metres complete so far, the work presents “a much simpler geological picture than previously interpreted,” the company added.
A 2012 resource estimate used a 0.3 g/t cutoff for eight zones along a five-kilometre trend to a maximum depth of about 400 metres. The total showed:
- indicated: 2.69 million tonnes averaging 2.76 g/t for 238,435 gold ounces
- inferred: 114.65 million tonnes averaging 0.75 g/t for 2.75 million ounces
Now Aurvista states, “The previously held interpretation of eight independent higher-grade gold zones is incorrect. Management believes there are additional higher-grade zones … linked by an extensive network of E-W, NW-SE and NE-SW structures in magnetic iron-rich volcanic rocks, but now non-magnetic sulphide-bearing, hosting iron-carbonates alteration, porphyries and/or silica-rich alteration and/or sodium-rich alteration.”
Last month Aurvista closed a $500,000 private placement. The company has 4,000 metres of drilling scheduled to begin in Q4.