Volcanic Gold Mines Inc. has reported further results of close-spaced air core drilling at its Mandiana Project in Guinea.
The drilling, immediately adjacent to Volcanic’s existing Inferred Mineral Resource at Yagbelen, now shows the mineralised target area surrounding and along strike from the resource to be over 3 km in length, up to 500 m in width and consisting of multiple parallel zones.
This mineralised area is considerably larger than the surface projection of the Resource (1 km by up to 200 m), thereby indicating the potential to significantly increase this Resource. Note that the maximum downhole depth from collar of AC drilling is 40 m for the entire Yagbelen programme. AC results therefore likely represent the surface expression of underlying mineralisation.
Air core drilling is a technique that allows rapid, low-cost exploration beneath cover with the objective of providing targeting information for further mineralisation. It has been used very effectively by Volcanic in the identification and refinement of resource targets for subsequent reverse circulation (RC) and diamond drilling. Volcanic’s near-term plan is to conduct such drilling within the target area identified by air core drilling, with the objective of defining an expanded resource.
Quality assurance and quality control
Drill chip sampling at Mandiana followed a standardised protocol to ensure the collection of representative and unbiased quantities of material from each sample. Samples were collected from Volcanic’s Mandiana field operations by SGS Mineral Services of Bamako, Mali, and were transported directly to the assay facilities thereof, at which they were analysed for gold by means of fire assay, in accordance with analytical method FAA505. In this procedure, a 50 g sample is fused with a litharge based flux; the resulting prill is then dissolved in aqua regia, from which gold content is then determined by flame AAS at a detection Limit 0.01 ppm. Volcanic routinely inserted appropriate standards and blanks into its sample stream at Mandiana, and additionally collected regular field duplicate samples.
Read the article online at: https://www.globalminingreview.com/exploration-development/16102017/volcanic-reports-air-core-drilling-results-at-mandiana-project/