For most companies entering a second year on the Australian Securities Exchange the term exploration play is generally an apt fit.
For Ventnor Resources (ASX:VRX) , however it is something of a misnomer, given the advanced nature of most of the company’s projects.
Ventnor listed in February 2011 on the back of a healthy portfolio of tenements, most of which have either been previously working mines, or have been subjected to substantial exploration by previous owners.
“We have three project areas, where the bulk of our exploration activity has been taking place,” Ventnor Resources managing director Bruce Maluish told The Inside Story.
“The Thaduna/Green Dragon copper project is in the Doolgunna district of the Gascoyne in Western Australia.
“The Warrawanda/Nickel Hills nickel project is located in the Pilbara region and the Georgina Basin IOCG project is in western Queensland.”
Unfortunately there is not a precise term for a company, like Ventnor, that acquires advanced projects like these, to adequately describe where it sits between the exploration and development stages.
If there were such a term, Ventnor would be the company qualified to coin it.
It would probably run along the lines of the company being a, ‘we are not carrying out exploration drilling to try and discover a project, we actually have projects that were once in production or have been subjected to not much previous exploration, which require us to carry out confirmation drilling to establish the best ways to bring them back to modern production’.
The company’s major project, the Thaduna/Green Dragon, is a perfect example of this conundrum.
The project consists of the Thaduna copper mine located 175 kilometres north of the Western Australian town of Meekatharra and the Green Dragon mine, which is approximately 4km further north from Thaduna.
Thaduna/Green Dragon came to Ventnor as an advanced exploration prospect with a number of priority drill-ready targets.
Thaduna was discovered by prospectors in 1941 and small scale production continued at the mine until 1953.
It was intermittently subjected to open cut mining and trial underground mining from 1955 to 1971 and a flotation plant operated from 1962 to 1971 producing copper additives for fertilisers.
Having produced 30,290 tonnes at 8.7 per cent copper, the abandoned Thaduna open pit is approximately 700 metres long by 80 metres wide.
The project’s location and potential have been highlighted in recent years by a number of major new copper/gold discoveries in the area, not least of which is the DeGrussa prospect of Sandfire Resources (AS:SFR), situated some 40km to the west.
“Doolgunna, at the moment, is probably one of the hottest prospect areas in Australia,” Maluish said.
“There is currently a lot of activity out there, mainly for copper exploration on the back of the De Grussa discovery.
“We have also had some significant results out of the area so far, having conducted three phases of drilling.
“We are currently in the process of a fourth phase.”
Ventnor focused its first phase of drilling at Thaduna in and around an old diamond hole that had been drilled by earlier owners of 9m at 5.22 per cent copper from 80m.
The results from the first phase included:
– 16m at 3.47 per cent copper from 80m;
– 4m at 4.37 per cent copper from 87m; and
– 7m at 5.70 per cent copper from 75m.
Ventnor was encouraged by these results, which it considered to provide a platform for a Resource definition drilling program, and embarked on a second phase of drilling down dip and along strike from the first.
The second phase of drilling results from Thaduna confirmed continuous copper mineralisation with intersections including:
– 5 metres at 4.21 per cent copper from 30 metres down hole;
– 3m at 4.47 per cent copper from 121m;
– 5m at 5.10 per cent copper from 100m;
– 4m at 3.85 per cent copper from 122m; and
– 11m at 5.57 per cent copper from 100m.
Additional copper mineralisation was also discovered along strike 300m north of the existing Thaduna pit.
Second Phase drilling conducted at the Green Dragon prospect also confirmed continuous copper mineralisation with intersections including:
– 2 metres at 9.00 per cent copper from 85m downhole;
– 4m at 2.98 per cent copper from 44m;
– 4m at 7.86 per cent copper from 60m;
– 5m at 6.07 per cent copper from 80m;
– 12m at 5.07 per cent copper from 64m; and
– 5m at 5.93 per cent copper from 88m.
The drilling confirmed an additional hanging wall copper mineralised zone at Green Dragon and also identified an additional footwall zone.
At the time Maluish claimed the drilling program had revealed, in his opinion, the most significant copper results in the Doolgunna District, since Sandfire’s DeGrussa discovery.
A subsequent Phase 3 drilling program commenced in October 2011 and was completed in December 2011.
The Phase 3 drilling of RC and diamond drilling discovered the primary mineralisation at Thaduna.
The deeper holes carried out during the program increased the company’s understanding of the geology and dimensions of the deposit.
Best results from the third phase of drilling at Thaduna returned:
– 10m at 7.53 per cent copper from 134m; and
– 32m at 3.10 per cent copper from 127m.
Green Dragon wasn’t about to be left out of the Phase 3 celebrations and chimed in with some impressive near surface copper mineralisation assays of its own.
These included:
– 10 metres at 6.82 per cent copper from 34 metres, including 6 metres at 10.96 per cent copper from 37 metres downhole;
– 7m at 4.43 per cent copper from 75m, including 5m at 6.07 per cent copper from 80m downhole;
– 19m at 3.33 per cent copper from 63m, including 12m at 5.07 per cent copper from 64m downhole;
– 7m at 4.33 per cent copper from 88m, including 5m at 5.93 per cent copper from 88m downhole; and
– 29m at 2.22 per cent copper from surface, including 9m at 4.00 per cent copper from surface.
The third phase of RC carried out at Green Dragon completed the company’s investigation of the extent of the main zone of mineralisation to a vertical depth of 200m.
The significant high-grade results achieved from the program, at or near the surface, greatly enhance the economics of the deposit by identifying its ability to immediately access ore for production.
Ventnor has maintained its aggressive approach to the Thaduna/Green Dragon project and has kicked off a Phase 4 drilling program of 9,000m.
This time the bulk of the program is to be diamond drilling, which the company expects will be completed in April 2012 with a JORC compliant Resource estimate anticipated to be completed by June.
The Phase 4 drilling program at Green Dragon is intended to achieve 4 goals:
Drill four deeper RC holes to the north to finalise the drill out of the mineralisation to 200m depth;
Drill four shallow holes to the south to follow up the near surface mineralisation;
Drill three RC holes to the east will test a possible second shoot of mineralisation that has splayed off the main mineralised zone; and
Drill two HQ diamond holes within the main mineralised zone to generate metallurgical samples as well as geotechnical data to aid with pit design work.
Ventnor anticipates the drilling of the two HQ diamond holes will add to its geological understanding Green Dragon’s mineralisation.
Ventnor’s original expectation for the Thaduna/Green Dragon project areas was that the ground was typical of the region and would host hydrothermal copper geology.
“We did think that it eroded down to an off-side blanket and the old guys, in the 1960s, had pretty much mined-out that supergene material,” Maluish said.
“Our real exploration target here was the chalcocite below those pits.”
In its first two drilling phases Ventnor was hitting the targeted chalcocite, with significant results down dip and along strike from the 1974 diamond holes which yielded the target.
What did whet the company’s appetite however, were the drill holes at Thaduna stopping in 0.1 per cent copper, which meant it had yet to penetrate the footwall.
“When we entered our third phase we instructed the geologist on site, that if he was still in 0.1 per cent or 0.2 per cent copper, he was to push the hole on into the footwall in order to determine what may be within the footwall,” Maluish said.
The geologist did as he was instructed to, having to return a couple of times, first reporting in 0.2 per cent copper.
Another 10m of drilling had struck five metres of visible chalcopyrite and instructions to push further resulted in another 96m and the drill rig had reached its capacity.
“We ended up with a string of extensive drilling results that included 62 metres at 2.19 per cent copper from 125 metres,” Maluish said.
“These were all in chalcopyrite. It was something of a surprise for us, but it also confirmed a conceptual target we then devised on a deeper primary zone sitting within the footwall.
“What we have now discovered is that we have got a mineralised zone of about 1.5 kilometres strike, basically across three major zones, the northern, southern and central zones.
“What we have ended up with is quite different from what we expected from the conventional geothermal modelling.”
Ventnor realised that all its initial drilling had only penetrated the chalcocite at the surface and it was only when it pushed the drilling deeper it discovered, in the footwall, chalcopyrite.
The current 9,000m drilling program, which includes 2,000m of diamond drilling, is in the process of doing just that.
“From that we should establish a greater understanding of the geology and the geometry, in particular, of this deposit,” Maluish said.
“To the point where, near the end of this current program, we should be able to drill holes that will translate into significant tonnes.”
WARRAWANDA AND NICKEL HILLS
Ventnor’s Warrawanda project is located 60kms south of Newman.
The project was subjected to exploration by Anaconda Nickel for nickel-cobalt laterite deposits in 1996 and 1997.
This activity included air-photo interpretation, airborne magnetic surveys, geological mapping, gridding, RAB, AC and RC drilling and metallurgical testwork.
“What we do know about Warrawanda, is that at the nearby Karlawinda project, Independence Group (ASX:IGO) has gold in black shales, at around 140 metres depth,” Maluish said.
“So our drill target at Warrawanda was the interaction between the low-grade nickel in the ultra-mafic and the black shales, and we were expecting a magnetic or EM response, where there might be a concentration of nickel.”
Ventnor conducted a helicopter-mounted EM survey and was surprised by the results, which indicated the magnetics fit geological model, almost perfectly.
“Disconcertingly so, because they very rarely fit the geological modelling,” Maluish continued.
“The EM also supported the geological model, so we selected 13 targets and drilled them.”
The drilling confirmed Warrawand as a massive east-west, largely uniform high magnesium ultramafic intrusion with associated low-grade nickel background values of around 0.2 per cent.
It is 15km long and 400m at its widest point and is open at depth.
The drilling returned elevated grades of up to 0.50 per cent nickel, over four metres, including coincident iron and sulphur, which the company read to suggest the project holds potential for mineralisation similar to that found at Mt Keith.
“The 13 holes we have drilled over the 15km are really only orientation holes at this point, but we did find some encouraging concentrations,” Maluish said.
“We have our eye on that Mt Keith-style iron-sulphur-coincident assay, and also an Indian-style iron-cobalt assay.
“We have more work to do there.”
Nickel Hills was explored in the 1970s by Pacminex, which conducted geophysics, soil sampling and auger sampling.
Three copper anomalies were identified and six percussion/diamond drillholes were completed, targeting the contact of an ultramafic intrusion.
“The magnetic survey carried out at Nickel Hills indicated that we have around 7.5 kilometres of Banded Iron Formation,” Maluish said.
“Interestingly enough, there are some features running alongside the BIF that were our original targets looking for nickel and copper.
“We have done some mapping there and have scheduled drilling there as well to be undertaken this year.”
GEORGINA BASIN
The Georgina Basin project is located 200km southwest of Mount Isa in northwest Queensland within the Proterozoic Mount Isa Inlier, which is one of the world’s most productive mineral provinces.
It is a significant silver-lead-zinc province, with significant iron oxide-copper-gold (IOCG) and massive sulphide deposits.
“Our Georgina project is a fairly large landholding, which we had granted just last year,” Maluish said.
“We picked it up in 2007, just after the Queensland government had flown a magnetic survey over it in 2006.
“We selected a couple of, what we considered to be interesting anomalies, modelled the magnetic gravity results and identified a drilling target.
“We applied for co-funded drilling from the Queensland government, which it accepted and we plan to drill an orientation hole into the Georgina Basin this year.”
Ventnor Resources Limited (ASX:VRX)
…The Short Story
HEAD OFFICE
Level 1
6 Thelma Street
West Perth, WA, 6005
Ph: +61 8 9226 3780
Fax: +61 8 9226 3764
Email: brucem@ventnorresources.com.au
Web: www.ventnorresources.com.au
DIRECTORS
Paul Boyatzis, Bruce Maluish, Peter Pawlowitsch, John Geary
MAJOR SHAREHOLDERS
Goldbond Super Pty Ltd 5.25%
Ms Neeltje Elisabeth Renes 4.85%
Mash Super Pty Ltd 4.53%
Ms Deborah Mary Schwann 4.53%
Sell Power Pty Ltd 4.21%
SHARES ON ISSUE
51.4 million
MARKET CAPITALISATION
$32.4 million (at 8 March 2012)