RE:RE:Porphyry Deposits"In British Columbia, many economic deposits are buried under thick glacial till. Exploration companies solve this challenge through the use of
RC drilling which helps to quickly determine bedrock geology. Sampling of the overlying sediments through RC drilling can also be used to analyse heavy metal concentrates (HMC/sulphides) within overlying glacial till to locate other economic targets."
While there no glacial till there may be lithocap and not sure if RC would be used or not.