Drilling techniques  Drill type (eg core, reverse circulation,...

Drilling techniques
 Drill type (eg core, reverse circulation, open-  All auger holes were completed by man portable
hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face- sampling bit or other type, whether core is oriented and if so, by what method, etc).
mechanical auger techniques.
 Average hole depth was 3.2m
 Hole diameter was nominally 50mm.