RE: RNS16 Sep 2021 15:36
Pascalle HEM Survey
New Resolution Geophysics (NRG) has completed 925 line kilometres of XciteTM HEM and AMAG survey at 100m spacing over the entirety of the Pascalle tenement. This survey gives the highest resolution geophysical dataset so far recorded over Pascalle.
EM surveys, such as that run by NRG, are designed to detect highly concentrated massive-sulphide bodies down to a depth of approximately 400m whereas AMAG surveys are designed to identify local magnetic anomalies, potentially associated with hydrothermal fluid flow activity. Preliminary processing of initial HEM survey results shows no evidence of massive sulphide, meaning that if sulphides are present there is not enough connectivity between the grains to create a conductive body. The survey has recorded 14 subtle anomalies that could be related to bedrock conductors but could also be explained by local near surface conductivity variations.
Where magnetic targets occur without associated massive-sulphide, as indicted by the absence of EM anomalies, there remains potential for low-sulphidation mineralisation such as quartz-Au stringer- breccia style or disseminated sulphides. Potential follow on work using a ground-based, gradient array induced polarisation (GAIP) electrical geophysical technique, (which has the ability to identify disseminated sulphide mineralisation, such as that associated with Telfer, Winu, and Calibre style gold- copper-silver type mineral systems), may be undertaken.
Final review of enhanced AMAG and EM channel imagery is required to clarify magnetic targets associated with low level amplitude EM anomalism. Structural interpretation of magnetic data will be used to define prospect scale targets to plan and mobilise GAIP surveys prior to drilling.