Project: Modeling surface geochemical responses in transported overburden above a VMS deposit
Geochemistry has been successfully used in exploration for many decades. Conventional methods would include a grid of soil samples collected over a geological or geophysical target, the drill would be placed where anomalies coincide. The reality today is that the remaining high quality targets are buried under deep and or complex cover where conventional methods are likely insufficient to confidently identify the target.
The M.Sc. study aims to answer the following question:
“Is there a way we can increase the confidence of detecting a mineralized massive sulphide target through complex exotic cover?”
With the guidance of Dr. Peter Winterburn, an experiment has been designed to test this idea. Fieldwork is already underway at the Lara polymetallic VMS deposit on Vancouver Island. Prior to sampling, a detailed surficial geology map has been created to better understand the type and relative age of cover materials. At each site multiple parameters were recorded such as moisture, pH, ORP, conductivity and chlorine content. A total of 150 sites have been sampled for ICP-MS analysis of both aqua regia and deionized water extractions. New technologies are also being tested on this project such as in-ground hydrocarbon sampling technology.
In late 2015, analytical results will be integrated with the field measurements and the surficial geology / terrain data to map and model the control on elemental distribution at the surface. Historical drilling data will then be digitized and used to assess the spatial relation of anomalies to bedrock mineralization.
It is the goal of the study to provide immediate benefit to the exploration community in BC and beyond. The results and recommended methodologies derived from work will provide local explorers and prospectors with the knowledge to make their geochemical sampling programs more informative and cost-effective. The anticipated completion date of this project is December 2016.