Barisan Porphyry Belt
Upper Ise Ise Porphyry Cu-Au Prospect
The geology of this prospect, which is located approximately 16 km southeast of Abong and 2.5 km northeast of Upper Tengkereng, is dominated by four dioritic stocks ranging from coarse grained, through medium grained and porphyritic, to fine grained variants that have been intruded into the Kenyaran Volcanic Formation. CRA Exploration evaluated this prospect during its exploration campaign in the mid 1990s and completed a limited amount of drilling. Mapping and sampling by East Asia Minerals has confirmed the presence of anomalous gold and copper mineralization hosted by altered diorite. The associated alteration consists of an initial quartz-sericite-pyrite event overprinted by widespread silicification and quartz-pyrite stockworks. East Asia Minerals drilled one hole on this prospect in 2011. The hole hit mineralization from surface to the end of the hole 800.95 meters below surface, confirming the presence of a significant gold copper porphyry system.
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