2013-9-18 · ELA 1544 Mt Zion Mineral Exploration Ltd Laloki …. ELA 1592 Frontier Copper (PNG) Ltd Warangoi …. PNG IWRM ? DEMONSTRATION PROJECT PROPOSAL OCTOBER 2007. The Laloki River catchment located in the Central Province is 440 km2 in area and is especially critical …. Gold and copper mining took place in the area.