@article{oai:ir.kagoshima-u.ac.jp:00008308, author = {NEDACHI, Munetomo and TAKTAI, Kammen M. and YAMANOUCHI, Hirofumi and MATSUMURA, Ken-ichi}, journal = {南太平洋海域調査研究報告=Occasional papers}, month = {2016-10-28}, note = {Appropriate Agricultural Development in Relation to the Terrestrial Environment, The Zn-Au hydrothermal ore deposits in volcanic rocks in Babeldaob Island, Republic of Belau (Palau), were discovered in the period of the World War II. However, the genesis for these ore deposits has not been discussed yet in detail. In this report, the Zn-Au ore deposits as well as volcanism and paleo-weathering, are geochemically studied to consider the environment of mineralization in the evolution of the Palau island arc system. Babeldaob Island is composed mainly of the volcanic rocks and raised coral reef. The volcanic rocks erupted during Ecocene to Oligocene, and debilitated at late Oligocene. The weathering of the volcanic rocks is recognized under lignite formations of Miocene to Pliocene age (TAYAMA, 1952).}, pages = {33--38}, title = {Mineralization and Volcanism in Babeldaob Island, Belau}, volume = {30}, year = {} }