SEDEX systems are the world’s most important source of lead and zinc and rank among the largest, richest orebodies on earth. Miramar Resources Limited (ASX: M2R) confirmed it had completed its first-ever auger drilling programme at the Joy Helen copper-lead-silver prospect, part of the 100%-owned Chain Pool project in Western Australia's Gascoyne region. The drill program rides on the back of the project's similarities with Sedimentary Exhalative (SEDEX) deposits in the Macar