THE DRILL SERGEANT: Perth-based Ironbark Zinc has received all assays from wide spaced exploration drilling conducted over its 100 per cent-owned Washington land project in northern Greenland conducted in August and September.
Ironbark said the drilling has returned widths of high-grade, primary zinc-lead-silver-barite mineralisation located around and along strike from a single discovery drill hole that was completed by Rio Tinto in 1999 at the Cass Fjord prospect.
Washington Land drill locations in yellow and mapped mineralisation in red. Source: Company announcement
The Rio Tinto drill hole returned 1.2 metres at 8.4 per cent zinc and 98 grams per tonne silver from 2 metres depth.
Rock chip sampling conducted at the time indicated zones of zinc-lead-silver-barite mineralisation up to two kilometres from the drill hole location.
This surface mineralisation was interpreted to be indicative of remobilised material and surface enrichment.
Ironbark conducted a program of deeper drilling that averaged 100m depth per hole over a strike of over 3km.
“All holes drilled over a 2.7 kilometre strike were mineralised with follow up drilling planned for 2012,” Ironbark Zinc said in its ASX announcement.
“The results validate the Washington Land project as having the potential to host a large scale base metal resource.”
Notable intercepts form the recent drilling include:
– 3 metres at 16.4 per centzinc plus lead, 77 grams per tonne silver within 17 metres at 4.1 per cent zinc plus lead, 23 grams per tonne silver from 48 metres; and
– 2.5m at 8.7 per cent zinc plus lead, 134 g/t silver within 9.5 metres at 4.9 per cent zinc plus lead, 65 g/t silver from 17.5m.
The prospect was originally identified in 1999 by Rio Tinto while it was conducting a brief helicopter reconnaissance.
Just the one drill hole was completed before a pre-planned demobilisation of the regional exploration program saw it up stumps and walk away.
No follow-up work has been carried out on the prospect until Ironbark’s drilling campaign this year.
During 2011 Ironbark chartered a ship to transport and establish a new wholly owned exploration camp and diamond drilling rig.
“The camp will provide an excellent ongoing platform for future exploration activities at the Washington land project,” Ironbark said.