St George Mining (ASX:SGQ) has discovered further massive nickel-copper sulphides at the Investigators prospect within the Mt Alexander Project in Western Australia.
Three of the five drill holes completed to date have successfully tested three separate electromagnetic (EM) conductors.
The electromagnetic conductors that were tested returned high grade massive nickel-copper sulphides with average grades of 7% nickel and 2.3% copper based on XRF analysis.
The drill program at Mt Alexander is continuing with 14 planned holes yet to be drilled and additional drill holes likely to be added.
John Prineas, executive chairman, commented: “The discovery of further high grade nickel-copper sulphide mineralisation at Investigators confirms the potential to significantly expand the known mineralisation at this prospect, where mineralisation has already been shown to be present recurrently over a strike length of 1.3 kilometres.”
Drill result details
Drill holes MAD43, MAD44 and MAD45 all intersected massive nickel-copper sulphides.
MAD43 intersected:
- A 9.42 metre thick interval, from 147.8 metres, of ultramafic with weak-moderate blebby and disseminated sulphides; and
- A 0.73 metre thick interval, from 157.22 metres, of massive sulphides with spot XRF readings averaging 5.1% nickel and 2.15% copper.
MAD44 intersected:
- 8.14m of ultramafic from 147.35m with rare disseminated sulphides; and
- remobilised massive to semi-massive sulphides in granite just below the ultramafic contact from 155.69 metres to 156.11 metres. XRF readings of the massive sulphide shows variation in the nickel content from 5-6% nickel in the core to 27% nickel in the coarse grained pentlandite-rich rims.
MAD45 intersected ultramafics from 165.2 metres down-hole, which included zones of massive sulphides.
Drill hole MAD46 is currently being drilled.
Mt Alexander
St George recently commenced a major drilling campaign at the Mt Alexander nickel sulphide project testing the Cathedrals prospect, the Stricklands prospect and the Investigators prospect.
Drill results from Mt Alexander during 2016 suggest it could be an emerging new nickel camp with potential for multiple deposits.
Multiple new discoveries in 2016 have established recurrent mineralisation over 3.5 kilometres of strike.
The program is testing new conductors and targets as well as targeting extensions to mineralised zones to establish a resource base.
Electromagnetic survey
A moving loop EM survey is also underway over new target areas in the Cathedrals Belt, and has just been completed over the area where the Cathedrals Belt intersects the Ida Fault.
The intersection of these structures may have operated as a control of the mineralisation in the Cathedrals Belt.
Two anomalous EM responses have been detected in this prospective area, and are being further evaluated in conjunction with St George’s geophysical consultants.