印度尼西亚苏拉威西岛-北马露姑群岛红土型镍矿的成矿地质规律研究

摘要

The Indonesian Sulawesi island-North Maluku islands locates at the intersection of Circum-Pacific metallogenic belt and Paleo-Tethyan metallogenic domain,which has several important lateritic nickel depos-its such as Konawe Utara,Subaim and Mabuli deposits.The research suggests that harzburgite,lherzolite, dunite and its altered rocks are the most favorable mother rocks.Cretaceous and Triassic magnesian ultraba-sic rocks have a nickel,bedrock enrichment ratio of 3.3~5.48,and they may form large or very large laterit-ic nickel deposits after weathering.The mineralization process includes three stages of saprolitization,lateri-zation and secondary enrichment.%印度尼西亚苏拉威西岛-北马露姑群岛位于环太平洋成矿域与古特提斯成矿域交汇部位,拥有北科纳威、苏巴印、马布里等重要红土型镍矿床。研究表明：方辉橄榄岩、二辉橄榄岩、纯橄榄岩及其蚀变岩石是最有利的成矿母岩,白垩系、三叠系镁质超基性岩,镍品位与基岩的富集比3.3~5.48,风化后可形成大型或超大型红土型镍矿床。成矿作用经历了腐岩化阶段、红土化阶段、次生富集阶段。