Galileo Mining (ASX: GAL) has intersected semi-massive sulphide mineralisation in the first two RC drill holes from an ongoing Fraser Range drill programme in Western Australia.
Two drill holes for 428m have been completed to date at the Delta Blues DB2 prospect with a third drill hole underway. Drilling is targeting the top of a modelled EM conductor with the two completed drill holes both intersecting semi-massive and disseminated sulphides.
Managing Director, Brad Underwood, said the sulphides are predominantly pyrrhotite with minor chalcopyrite (copper mineral) and occur in connection with mafic and felsic intrusions which have been logged in the field as a gabbro and a tonalite respectively.
The geological results from the first round of drilling at our Delta Blues prospect are highly encouraging with sulphides in both holes drilled to date. The mineralisation appears related to mafic and felsic intrusions which is unusual for the Fraser Range and possibly the first time this association has been identified in the region,” Mr Underwood said.
“Assay results and microscope petrography will provide us with a guide to the economic potential of the prospect while a follow up diamond drilling program is designed to test the better parts of the EM conductor at depth.
“The RC rig will finish a third drill hole at DB2 before moving on to the DB1 target with the remaining programme expected to be completed over the next week. A market update will be provided as results become available.”
Mr Underwood said the economic implications of the initial results from DB2 are at this stage uncertain with deeper diamond drilling required to test the better parts of the EM conductor at depth. The scale of the modelled EM conductor at Delta Blues DB2 is substantial with dimensions up to 500m by 500m. Only the very top of the conductor has been drilled and down hole EM surveying will be undertaken to refine the targets prior to diamond drill testing.
Samples from the RC drilling have been submitted for analysis to the laboratory in Kalgoorlie with results expected in September. Timing of diamond drilling is subject to rig availability as Western Australia continues to be affected by labour shortages which limit the ability of contractors to undertake Galileo’s drill programs.
Drilling at the Delta Blues DB1 prospect will begin after the final hole at DB2 is finished. Two drill holes are planned at DB1 to test the top of a very strong EM target with the top of the modelled conductor estimated to start between 175 to 255 metres below surface
Geology logging at DB2 recorded a thin layer of sediment cover overlying typical Fraser Range meta- sediments and mafic granulites near surface. Small units of mafic (gabbro) intrusive rocks within the meta- sediments were noted prior to the sulphide zones.
The sulphide mineralisation in both drill holes occurs as semi-massive bands surrounded by disseminated sulphide within a mafic intrusion immediately adjacent to a medium grained felsic intrusion. These intrusions have been preliminarily logged on site as a gabbro and a tonalite with petrography planned to determine the precise rock classifications.
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