GreenTech Metals (ASX:GRE) has modelled a large conductor plate from survey results conducted on the first of three drill holes from an initial campaign targeting Cu-Zn prospects at Austin, Shelby and Ayshia targets within its Whundo Cu-Zn project in the West Pilbara.
The first DHEM (Down Hole Electromagnetic) survey results, from drill hole 24GTRC005 testing the Shelby target, highlighted a large >400m x ~50-100m conductor plate.
“We are very excited to see such a large conductor materialise at depth at our Shelby target. This is exactly the scale of anomaly that we are targeting at Whundo which has the potential to significantly increase our copper resources,” Executive Director, Tom Reddicliffe, said.
“Although our drill hole fell short of this target the drill hole has proved perfect for using DHEM to search the deeper reaches of Shelby. Importantly, the conductive response was 15,000 siemens which is significantly greater than previous responses of known mineralisation intersected by drilling at Shelby.
“As the target represents the down dip extension to a previously drilled mineralised zone, we are keen to get a follow-up drill program underway to test this target at depth.”
Shelby
Shelby is a deep conductive and weakly magnetic target identified by Fox Resources in 2006 and located 500m NE of the Whundo Mine. Drilling undertaken by Fox Resources returned an intercept of 11.25m @ 1.6% Cu from 391.25m including 5.8m @ 2.4% Cu from 391.25m in drill hole SHDD016.
In 2022 GreenTech completed follow-up drill hole 22GTRC034 which reported 14m @ 0.5% Cu from 417m2. The most recent drill hole 24GTRC005 was drilled to test a DHEM conductor target interpreted from the DHEM survey completed on drill hole 22GTRC0343. Due to deviation of the drill hole the target was not intersected and the hole terminated at 648m depth. Despite this, the subsequent DHEM survey results conducted on drill hole 24GTRC005 has highlighted a highly conductive plunging conductor plate measuring >400m x ~50-100m.
It is not known at this stage whether this is a separate conductor plate to the previously identified mineralised horizon intersected in drill holes 22GTRC034 and SHDD016 or a potentially new deeper mineralised horizon. The conductor plate identified in hole 22GTRC034 has a 5,000 – 10,000 siemens conductive response4 compared to the significantly greater 15,000 siemens conductor identified by the DHEM survey for 24GTRC005.
Shelby drilling has previously demonstrated potential for both thickness and high grade and could potentially add significantly to the combined Whundo resources. As the current hole deviated from the targeted conductor plate no significant mineralisation was identified. However routine sampling of the drill spoils was completed and dispatched for analysis.
Two prior attempts to drill the Shelby target with holes 24GTRC002 and GTRC003 were unsuccessful due to extreme deviation of the holes.
