Galileo Mining Ltd(ASX: GAL) has identified future drill targets with results of EM surveying from the Delta Blues prospect within the Fraser Range Belt in Western Australia.
DHEM surveying at the Delta Blues DB2 prospect has defined a highly conductive target with modelled conductivity up to 10,500 Siemens. The most conductive zone is positioned below drill holes DBRC001 and DBRC003. Both RC drill holes recorded sulphide intercepts with anomalous amounts of copper and gold in the first round of drilling undertaken at the prospect.
Modelled conductor dimensions up to 500m by 500m represent a large-scale target with all three drill holes completed to date showing sulphide indications over a minimum strike length of 210 metres.
Managing Director. Brad Underwood, said diamond core drilling is planned to commence in early December to test for economic mineralisation at the DB2 prospect. EM surveying at the Delta Blues DB1 prospect was not successful in replicating earlier modelling and this target will not be drilled in the upcoming drill program.
The downhole EM surveying has confirmed the location of the strongest part of the conductor at the DB2 prospect and we are now ready to start diamond core drilling. We have contracted a drilling company and have been given an estimated start date of early December, subject to the usual constraints of rig availability and weather conditions,” he said.
“Assay results from the first round of drilling at the DB2 target were very encouraging with anomalous copper- gold sulphides in all three drill holes at the DB2 target. Diamond core drilling will aim to determine whether the sulphide occurrences have economic potential where the conductive zone is much larger and stronger.
“Meanwhile at our Norseman Project, a 10,000 metre aircore drill program directed at palladium and nickel prospects is due to start imminently with an announcement to be made when the rig is on site.”
DHEM surveying was completed on drillholes DBRC001 and DBRC003 with modelling of results showing east dipping plates with high to very high conductivities (5,000 to 10,500 Siemens). No on-hole anomalies were detected in DBRC001 with an off-hole anomaly at 190 metres corresponding to the peak of mineralisation in the drillhole (1m @ 0.61 g/t gold and 0.66% copper from 190m). DBRC003 had a small on-hole response at 150m which migrated to a large off hole response at 160m. This interval coincided with sulphide mineralisation intercepted in the drill hole.
EM results heavily imply that the conductive response observed at the DB2 target is related to sulphide mineralisation. Whether the sulphides contain economic mineralisation at depth will be determined with a diamond core drilling program up to 1,200 metres of drilling planned over three holes.
Fixed Loop EM surveying at the Delta Blues DB1 target was undertaken with two loops utilised to maximise coupling with the modelled conductor (modelled from Moving Loop EM surveying). Two 600m by 400m loops were used in alternate positions with multiple readings taken at 50m station spacings to locate the source of the conductive anomaly.
Results from the Fixed Loop survey did not support the DB-1 modelled conductor and the response observed from Moving Loop EM data is believed to represent current channelling along a geological boundary. This interpretation will be further verified with either additional EM surveying or RC drilling. On the basis of the current results, the DB1 target will not be drilled in the upcoming diamond core programme.