Surefire Resources NL (ASX:SRN) has received approval from WA’s Department of Mines, Industry, Regulation and Safety (DMIRS), for its program of work (PoW) related to an up to 6,000 metres reverse circulation (RC) drilling program at its 100%-owned Yidby Gold Project.
The company has engaged drilling contractors to carry out the drilling program, which will test the extensions of the thick and relatively high-grade Yidby Road gold mineralised zone both at depth and along strike.
A gravity survey has been carried out over a 2-kilometre-long corridor to the northwest and southeast of the Yidby Road drilling area and targeted the porphyry intrusions and structural breaks associated with the major structures that host the mineralisation.
The proposed drilling will test extensions of the double-plunging, porphyry associated, mineralised zone both at depth and along strike of the previous thick and high-grade intersections with best results include:
- 56 metres at 1.97 g/t gold from 44 metres including 4 metres at 14.47 g/t; and
- 40 metres at 3.01 g/t from 24 metres including 4 metres at 26.57 g/t.
“Encouraged by survey results”
Surefire managing director Vladimir Nikolaenko said: “The approval of the Yidby Road PoW has opened the way to commencing the major new RC drilling program at Yidby Road in the very near future.
“We are also very encouraged by the results of the detailed gravity survey, that looks to have defined the potentially mineralised structural corridor over at-least 2 kilometres and highlighted key targets for repeats/extensions of the Yidby Road mineralisation for further regional scale drill-testing.”
Drilling program
The company has engaged drilling contractors to carry out the drilling program, testing the extensions of the thick and relatively high-grade Yidby Road gold mineralised zone at depth and along strike to the northwest and southeast.
Previous strong gold intersections are associated with alteration and veining with sulphides across the hanging wall contact and within a sheared and altered ultramafic/mafic unit and a large felsic porphyry intrusion up to 50 metres thick.
Gravity survey
Preliminary interpretation of the gravity survey images highlights the major northwest-southeast trending structural corridor associated with the mineralisation, that has produced an apparent off-set of the surrounding ultramafic and mafic rocks.
The host ultramafic/high-magnesium basalt unit is expressed as a thick, anticlinally folded, gravity low, off-set by the major northwest-trending structure that hosts the Yidby Road porphyry and mineralisation.
A small gravity high is associated with the main Yidby Road gold mineralisation that produced the recent intersections related to a palaeo-high in the saprolite over the quartz veining and porphyry.
Multiple follow-up targets for extensions and repeats of the Yidby Road mineralisation have been identified by this detailed gravity survey.
MMI soil survey
A soil sampling survey has also been completed over Yidby Road, extending northwest and southeast of the drilled area, over a 1.6 kilometres strike length.
Samples will be analysed using the Mobile Metal Ions (MMI) method to detect weakly bonded gold and other associated elements in the upper profile.