White Rock focused to build on 9.1 million tonne resource
Diversified explorer and near-stage producer, White Rock Minerals Ltd (ASX:WRM), in conjunction with its joint venture partner Sandfire Resources NL (ASX:SFR) has completed a 500 square kilometre airborne electromagnetic (AEM) geophysical survey.
This survey was flown at the company’s globally significant Red Mountain high-grade zinc and precious metals VMS (Volcanogenic Massive Sulphide) project in central Alaska.
At Red Mountain, there are already two high grade deposits, with an Inferred Mineral Resource of 9.1 million tonnes at 12.9% zinc equivalent for 1.1 million tonnes of contained zinc equivalent.
The AEM survey, completed by SkyTEM, used a state-of-the-art data collection and processing system to identify potential VMS conductors within the Bonnifield East district.
The survey also included the collection of magnetics data.
When integrated with the surface geochemistry and the company’s geological knowledge, these new data sets are expected to generate a list of high priority VMS targets for drill testing during the 2019 field season which will begin immediately.
Preliminary AEM data as indicated below highlights numerous conductivity features related to the geology and structure of the Bonnifield District and associated known VMS mineralisation.
The data gathered is now being processed by SkyTEM prior to advanced modelling and interpretation by NewExco.
While waiting for the final processing and interpretation of the results, NewExco and White Rock’s consulting geophysicist are working with the preliminary data to identify conductivity features for immediate field exploration.
This will include follow-up on-ground geological reconnaissance, surface geochemical sampling and ground based electrical CSAMT geophysical surveying ahead of drill testing.
Regional targets a key focus
White Rock’s managing director, Matthew Gill was encouraged by the quality of the data collected using more sophisticated technologies, saying “We are very pleased with the preliminary results from using this modern, high-powered AEM technique over our 475 square kilometre strategic belt-scale regional tenement package.
“This is the first step in our comprehensive exploration program for 2019.”
“Regional targets identified by this AEM survey will form a key part of the company’s exploration program this field season.
“Other activities this season will involve using satellite spectral analysis, on-ground geological reconnaissance and soil sampling.
“These activities will complement planned electrical ground geophysics (CSAMT and MT) and a diamond drill program.”
These coordinated activities could lead to further exploration success after the company’s successful discovery at the Hunter prospect in 2018.
White Rock will be testing the best of the regional targets defined by this multi-disciplinary use of airborne electromagnetic, stream geochemical anomalies, new satellite defined alteration, whole rock litho-geochemical alteration, on-ground soil and rock geochemistry and on-ground electrical geophysics techniques.