AGGRESSIVE PNG minerals explorer Frontier Resources Limited has kicked off its Bulago high-grade gold and porphyry copper-gold drilling programme.

The initial part of the programme is being undertaken, at the Central Lower Zone of the Swit Kai high-grade gold Prospect.

Frontier will initially target the dipping mineralised zone from the SUG002 drill site and attempt to intersect it multiple times from that pad. The SUG002 pad is on the hanging wall side and drillholes from it will result in the best angles of incidence to the moderately south dipping gold target zone.

Frontier chairman and MD, Peter McNeil, said the rationale for originally drilling from the footwall side (CLD holes) was to try and intersect the ‘horizontal plunge or sausage’ that is thought to contain wider and higher grade mineralisation, which is not physically possible from the hanging wall side, because all such holes would drill underneath the plunge.

He pointed out that former JV partner Ok Tedi Mining Ltd targeted the depth extension to the Central Upper Zone with hole SUG002 and it returned an ‘accidental’ intercept of 1.3m grading 27.0 g/t gold from the moderate south dipping zone/ component in the Lower Zone.

“This intercept is located underneath the plunge of the high-grade conformable gold mineralisation we targeted last programme with the CLD designated holes and shows the moderate south dipping zone itself also contains very good gold grades,” Mr McNeil said.

The CLD holes will later be lengthened to reach the target depth that was not achieved for various reasons last drilling programme.

Frontier also hopes to be able to undertake additional general exploration to:

  • Further hand trench topographic +/- lead/zinc/gold soil anomalies that appear to represent repetitions of the known high grade mineralisation and thus hope to define future and possibly more extensive drilling targets.
  • Pan concentrate /stream sediment sample the watercourses to the north-west and north of the Swit Kai Prospects, as they have never been systematically evaluated, but where reconnaissance sampled they have demonstrated significant gold anomalies.  This region drains an intrusive that also has significant  aeromagnetic and potassium radiometric anomalies requiring follow-up.
  • Reconnoitre and also hand trench the major gold/zinc/lead soil anomaly in the central north of the Bulago Valley.

Mr McNeil said limited exploration undertaken during the late 2016 drilling programme specifically targeted three topographic “flat spots” along and across strike from the known high-grade gold mineralisation, with hand trenching, mapping and sampling.

Trench 3 returned a rock sample grading 16.40 g/t gold + 54.7 g/t silver that was outside the soil grid and 830m WNW of the East Creek drilling.

“These geomorphological anomalies (small flat spots and possible conformable mineralisation) have steep northern sides representing possible moderate south dipping zones/ mineralisation,” Mr McNeil said.

“They were targeted because the mineralisation model for Swit Kai consists of both a moderate south dipping zone and a conformable sub-horizontal zone. These characteristics are reasonably expected to be repeated in other locations within the area, resulting in multiple gold mineralised zones as we have apparently observed.

“These flat spots are also associated with strongly anomalous lead and zinc (with local gold) in soil geochemistry, further reinforcing the parameters of the mineralisation model and demonstrating that all such zones require concerted evaluation. There are many such geomorphological anomalies in the general Swit Kai and Bulago area and they are relatively simple to follow up and evaluate, in preparation for future drilling.

“New sub-cropping and out-cropping mineralisation was also discovered over a >40m length and up/downslope on the walking track to the EZL hole drill pad, between the Central Lower Zone and East Creek drill pads,” Mr McNeil said.