Legend Mining Limited (ASX: LEG) has identified three conductors interpreted to be related to nickel-copper mineralisation with preliminary modelling of the data from the HPFLTEM survey at the Octagonal prospect within the Rockford Project, Fraser Range, Western Australia.
The survey, designed to identify conductors below 600m, was conducted from October to December 2023 and the results are discussed in detail in the body of this announcement.
We are cautiously optimistic with the results of this survey to date. The evidence of nickel-copper mineralisation in drillholes proximal to the modelled conductors and the strong conductive source to the east of the Octagonal Intrusive Complex are both positive takeaways,” Legend Executive Chair, Mark Wilson, said.
“As noted in this announcement the final modelling of these conductors will need the input of the data from the extended survey which is planned for March/April 2024. This final modelling is expected to generate new drill targets for the 2024 field season and Legend looks forward to updating the market in due course.”
Highpower EM Geophysical Services Pty Ltd have completed the maiden HPFLTEM survey at Octagonal. The HPFLTEM survey data acquisition was severely hindered by atmospheric conditions, resulting in unanticipated delays. The final data has now been received and preliminary modelling conducted.
Four preliminary conductors have been identified, with three interpreted to relate to extensions of Ni-Cu sulphide mineralisation encountered in proximal drillholes.
Preliminary modelling suggests the identified conductors are complex, with final models subject to refinement post receival and integration of additional data.
Conductor 1 is located down dip along the intrusion contact, proximal to mineralisation intersected in OCT0184 and OCT0190
Conductor 2 is intersected at the top edge by OCT0005, relating to a zone of blebby through semi-massive Ni- Cu sulphide
Conductor 3 is the southern extension of a zone of remobilised semi-massive Ni-Cu sulphide intersected in OCDD003.
Conductor 4 is a deep, low conductivity feature that aligns with the seismic feature interpreted to be the feeder structure at the base of the OIC.
The channel 32 data identified a strong conductive source extending to the east of the completed survey area. This area is of interest as it is the interpreted extension of the Octagonal intrusion based on completed drilling coupled with seismic and structural interpretation. Encouragingly, diamond drillholes OCT0189 and OCDD004 both intersected Ni-Cu sulphide within fertile ultramafic sills proximal to the strong conductive source, confirming mineralised intrusion occurs outside the main OIC body. This is identical to the Nova-Bollinger mineralisation setting.
Given the strong response to the initial HPFLTEM survey and the newly identified zone to the east of the OIC, the survey will be extended. Survey design and planning will commence on completion of the final modelling from the completed HPFLTEM survey. Data acquisition of the extension survey is anticipated for March/April 2024.
