Legend Mining Limited (ASX LEG) has commenced a new high-power fixed loop Electro-Magnetics (HPFLTEM) survey over the entire Octagonal prospect within the Rockford Project in the Fraser Range region of Western Australia.
This new high power fixed loop EM survey is designed to identify conductors below 600m,” Executive Chair, Mark Wilson, said.
“The design loops are large, roughly 2km x 1km, and the survey covers the majority of the Octagonal prospect, specifically the mineralised eastern flank.
“The results of this survey, along with interpretation of all data sets from Octagonal, is expected to deliver the next targets for diamond drilling at this prospect.”
Highpower EM Geophysical Services Pty Ltd has mobilised to site and commenced the maiden HPFLTEM survey at Octagonal.
The observed increase in sulphide content and tenor in OCDD004 and DHTEM response has given encouragement to deploy a new HPFLTEM survey across Octagonal, with the aim to identify large sulphide bodies at depth.
Forward modelling conducted during the HPFLTEM programme design suggests large sulphide accumulations should be detectable below 600m depth with the large loop, high current, and ultra-low frequency parameters of the purpose-designed survey.
The HPFLTEM survey and associated modelling is expected to be completed within five weeks.
A detailed structural logging campaign is nearing completion on the four completed diamond drillholes at Octagonal. Structural expert Jon Standing from Model Earth Pty Ltd has completed the data acquisition phase of the structural review. The data gathered from the recently completed diamond drillholes will give new lithological and structural context, critical to the understanding of the Octagonal Intrusive Complex (OIC).
Coupled with new HPFLTEM data and refined seismic interpretations post-acquisition of the downhole petrophysical property data, these new datasets add to the existing foundation data to evolve the targeting model across the OIC.
