Legend Mining Ltd (ASX:LEG) has started diamond drilling at the Mawson prospect within its Rockford Project in Fraser Range, Western Australia.
Initial drill targeting will be focused on two areas (see Figure 1).
Figure 1: Mawson diamond drilling priority seismic target areas.
Target area A
Target area A will see diamond drill holes target interpreted extensions of massive nickel-copper mineralisation below the Mawson discovery zone, below and offset by the Mawson fault.
Evidence in seismic and structural interpretation, gravity modelling, and existing drilling data suggests significant potential for the mineralised Mawson chonolith extending for considerable depth below the Mawson fault.
Target area B
Target area B will test an interpreted thickening of the mineralised chonolith below a metasedimentary raft.
Structural analysis and seismic modelling, coupled with geochemical modelling from completed drilling, suggests the Mawson chonolith may extend to greater than 1,200 metres below surface.
The depth of this intrusive body makes it blind to surface EM (electromagnetic), therefore opening up a very large and prospective search space below current drilling.
Managing director comments
Legend managing director Mark Wilson said: “The initial diamond drill holes of the new field season are designed to test targets which have been modelled from the recently completed seismic survey data along with our existing comprehensive datasets.
“The first of these holes is testing below the Mawson discovery mineralisation into a lookalike zone below the Mawson fault which is supported by the nickel-copper sulphides from diamond hole 33 as detailed in the ASX announcement on 17 March 2022.
“The Legend team eagerly awaits the results of this drilling over the coming months”.
Next steps
All completed diamond drill holes will be subject to a suite of downhole geophysics, including EM and petrophysical property measurements, with collected data to aid in direct targeting for economic sulphide accumulations as well as refinement of the existing seismic cube.
Regionally, innovative MLTEM and follow up FLTEM is scheduled to start across the highly ranked regional Rockford targets in April 2022 (see Figure 2).
Figure 2: Rockford Project – Mawson location, regional prospects, and targets.
Aircore drilling is also scheduled to start once statutory approvals are granted.