The programme was designed to constrain the southwestern and southern margins of mineralisation, and to probe aspects of the structural (fold) model being developed for western Zone 1.
Drilling continued to intersect substantial graphite (Cgr), with all nine holes hitting graphite and eight of the holes returning significant intercepts of Cgr, Berkwood said.
"So we begin the exciting but painstaking work required to unravel the structural and geological disposition of the Lac Gueret South Zone 1 graphite deposit, as Berkwood endeavours to chart a focussed and efficient program to define the potential for an economically mineable resource there,” said Tom Yingling, the president and chief executive officer of Berkwood.
“Field crews have been on site at Lac Gueret since early February to perform detailed structural logging and analysis of previous drill core - and we are increasing our structural capabilities through new collaboration with Terrane Geosciences. We are making progress in stages, and continue with each successive phase to build on the great results we have enjoyed since discovery," he added.
“Critically, the exploration potential for a significant graphite deposit continues to be supported by the Phase 3 campaign," Yingling declared.
The continued testing of the western end of Zone 1 supports a model for the graphite horizons probably being folded at the western end of the geophysical anomaly, Berkwood told investors.
Several other examples of similar folding in the basement rocks that are observed within an 8-kilometer radius of the deposit show that bowed fold patterns on the scale of the Zone 1 occurrence are common in the area. Further drill testing is required to continue to define the continuity and structural disposition of the mineralised intervals.
In addition to drilling, and when snow conditions permit, the company is considering an in-hole / intra-hole electromagnetic survey that charges specific graphite horizons which can then be traced between holes and on the surface.
Berkwood said some 258 sawn core samples from Phase 3 drilling are to be shipped to MS Analytical Laboratories in Langley, British Columbia for treatment under the same analytical procedures applied to the samples from previous programs.
Berkwood has retained the services of Met-Solve Laboratories Inc of Langley, British Columbia to initiate mineral processing tests on a suite of graphite mineral samples.
This work is required for metallurgical testing for process design following the positive initial flake sizing results announced on March 8, 2018.
First results should be available around the middle of May.