Geopacific Resources expects to shortly receive the first assay results from a drilling program at the Woodlark Gold Project on Woodlark Island in Papua New Guinea. The samples are being prepared at an on-site laboratory operated by Intertek.

The quality assurance provider has been appointed by Geopacific to provide sample preparation and analytical services for the drilling samples from Woodlark.

A reverse circulation (RC) and two diamond drill rigs have been drilling at the Busai and Kulumadau areas over the Christmas period. The first samples left the island shortly before Christmas and results are expected shortly.

Intertek operates the laboratory at Woodlark, which is equipped with the latest crushing and pulverising equipment. Intertek has a long association with the project, having been responsible for on-site preparation and external analysis of drill samples since 2002.

The laboratory is independent of Woodlark with supervision and quality control monitored by Intertek staff. A third party laboratory is used for additional quality assurance and quality control analysis to ensure that the highest analytical standards are maintained.

Samples are collected from a riffle splitter in the case of the RC holes or diamond-saw-cut core samples in the case of the diamond holes. Samples are typically collected at 1-metre intervals, with duplicate samples taken every 20v metres.

Once collected, samples are sent to the on-site laboratory for preparation. Samples of about 2.5kg are weighed, oven dried for 24 hours then weighed again to determine loss of moisture. The samples are jaw-crushed then further reduced by single-stage pulverisation in LM2 disc pulverisers and then split to produce a 150 gram sample for analysis. The remaining sample is stored for future reference.

The pulp is flown to the Intertek laboratory in Cairns, Queensland, via Port Moresby, for analysis of gold by 50 gram Fire Assay method plus determination of a suite of additional base metal, precious and pathfinder elements by the ICMPS method.

Geopacific managing director Ron Heeks said: “Having an independent laboratory on site is efficient and cost effective. It allows samples to be prepared on site as drilling occurs and means that only small samples need to be flown to Cairns for analysis – important when you are on an island.”

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