Castile Resources Ltd (ASX:CST) has found indications of iron-oxide-copper-gold (IOCG) mineralisation via an Ambient Noise Tomography Survey (ANT) at its Pathfinder 38 target in the Northern Territory.
The discovery – which entailed an alteration associated with IOCG mineralisation being picked up in exploration hole 25P38D001 – is significant, given that this is the first time that such mineralisation has been successfully detected using ANT.
Within this hole, Castile found one zone of distal silica-hematite alteration measuring between 253 and 277 metres – which suggests the possibility of mineralisation to the north, a zone of strong magnetite replacement of jasper with pyrite in a parasitic fold between 395.35 and 396.2 metres (which repeats the structural setting at Castile’s Rover 1 deposit), and chlorite alteration and associated disseminated magnetite with elevated copper up to 30 times background (max 770ppm) between 580.9 and 612.35 metres down hole.
The company is now aiming to build on this with a downhole magnetic survey in 25P38D001 which will seek to further constrain the magnetic source, plus an ANT survey to determine another target to drill into this initial discovery at Pathfinder 38.
Managing director Mark Hepburn said he was pleased to have completed work which had proved the value of ANT technology at Pathfinder 38.
“This successful intersection of IOCG mineralisation in 25P38D001 will prove invaluable, by allowing Castile to benchmark ANT survey results to know geology to further refine targeting for high-value Rover 1 style deposits under cover,” he said.
“Our Rover 1 Project is ready for development, and we will continue to seek out additional inventory within our Rover Mineral Field for our ‘hub and spoke’ strategy with our aggressive exploration program using the ANT technology.
“Hole 25P38D001 was 50% funded by the NT Government as part of the Geophysics and Drilling Collaboration program being run by the Northern Territory Geological Survey and we thank them for their continued support.”
Castile shares have been trading at 5.3 cents.
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