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Chargeability levels in the 2021 IP survey are roughly similar to those reported from the historic 2012 IP survey (Figure 1). The Company believes the chargeability anomalies in the two IP surveys indicate a single body of sulphide-bearing rocks over at least 5.3 km in length on the Goathorn Property. These sulphide-bearing rocks and the extensive magnetite skarn are interpreted to represent the cap above a major porphyry system.
Our mapping has shown there are several generations of porphyritic intrusions and more importantly, we discovered a copper mineralized porphyry dyke in a road-cut supporting our hypothesis that a porphyry system may be associated with the magnetic high. Sampling returned a high Au:Cu ratio of 1/3 (as calculated by g/t Au divided by percent Cu) and age dating of the dyke returned a 72 Ma age, placing it in the metal-rich Late Cretaceous intrusive suite hosting gold-rich deposits like New Prosperity and Blackwater. The occurrence lies in the vicinity of our chargeability anomaly but its low sulphide content (<2%) would negate it being the source of our chargeability anomaly which exceeds 20 mV/V beneath it.”
The 2021 IP survey at Goathorn was designed as a reconnaissance test in the vicinity of the magnetite skarn and the copper-gold mineralized dykes. It was conducted along four southeasterly-trending lines spaced 400 m apart (Figure 1). Inversions at depths of 100-500m below surface reveal a northeasterly-trending chargeability high (>10 mV/V) ranging from 400m to >1300m wide and extending along the entire 1200m length of the IP grid.
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Figure 1. Chargeability from Harvest Gold’s 2021 Goathorn IP survey and the historic 2012 IP survey on the newly acquired claim. Harvest Gold’s 2021 survey shows the chargeability inversion at 400m below surface. The historic survey shows chargeability using a 21-point filter rather than an inversion.
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Figure 2. Reduced-to-pole (RTP) airborne magnetics over the Goathorn property showing the location of the airborne magnetic high, the 2021 IP survey, the 1970’s Minfile copper occurrences and the newly-acquired claim.
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