Background to the drilling programme at Tripela
Massive chalcopyrite sample from the Tripela area discovered in 2012.
Geological mapping and sampling in 2012 discovered significant copper and molybdenum soil anomalism at Tripela in the Mt Nakru area. Float and outcrop sampling and geological mapping delineated numerous occurrences of in situ high grade copper and molybdenum mineralization with grades up to 29.5% copper returned from outcrop assays. Much of the mineralization in outcrop is interpreted as D veins occurring around the alteration halo of a buried porphyry deposit. This geological mapping and rock sampling were followed up with trenching in 2013 and 2014 to more fully define the surface anomalies.
Tripela Phase 1
Tripela Drilling – Phase 1
The initial drilling programme at Tripela completed between January and May 2014 was designed to test for confirmatory evidence of underlying porphyry emplacement. The principal aim was the recognition of the zonation of argillic, phyllic and propylitic alteration at Tripela that would lead us to an inner potassic alteration zone which is in turn believed to be at the core of the porphyry deposit. DDH010, the last of seven drillholes completed during the initial phase of drilling, was completed in May and we then collated and assessed the data obtained from the seven drillholes. Widespread phyllic and argillic alteration was recognized in most of the holes, in particular DDH004, DDH006 and DDH008.
Intense clay alteration exposed during drill pad preparation at Tripela in early-2014. The dense vegetation on New Britain island makes geological mapping difficult and exposures such as this are of great assistance in delineating alteration zonation patterns.
Tripela Phase 2
Current Tripela Drilling – Phase 2
In June 2014 we commenced a follow-up programme to test for the deeper porphyry bodies interpreted from the shallower vector drilling programme. The first deep hole, DDH012, was completed in early-August 2014.
By January 2015 we had completed four additional deep (each >950 metre) holes. Extensive epidote alteration, intersected in each of these holes, has allowed us to start to define an inner propylitic alteration halo. Petrographic work on samples from the hole confirmed the host rock as a dioritic porphyry intrusion. By the end of the first quarter of 2015 approximately 7,000 metres had been drilled at Tripela.
Dr. Greg Corbett and Doug Menzies of CMC Consulting Pty Limited (“CMC”) visited our project in PNG between 23rd June and 31st June 2014. The visit included some three days of core logging alongside our technical team and proved very helpful in terms of the development of our geological model for the project. The resulting CMC report has informed and validated the thrust of our exploration programme at Tripela and its objectives.
Intense epidote alteration in Tripela drillcore