大洋洲地区地质矿产编图新进展

摘要

介绍了大洋洲地区编图方面的新进展.项目组编制出版了《大洋洲地区地质图》(1:250万)及《大洋洲地区金属矿产图》(1:250万).在图件说明书中将大洋洲地区原来的3个一级构造单元重新划分为4个一级构造单元,强化了巴布亚新几内亚-新西兰造山系中生代构造单元的重要性,与西南太平洋岛弧区新生代构造单元分开.将4个一级构造单元进一步细化为12个二级构造单元和42个三级构造单元,编制对应的地层柱状图、侵入岩序列图.根据大洋洲各构造单元的成矿特征划分了相应的成矿区带,将大洋洲地区分为4个一级成矿系列,即中西澳陆块区前寒武纪克拉通成矿系列、东澳古生代造山系成矿系列、巴布亚新几内亚-新西兰中生代岛弧成矿系列、西南太平洋新生代多岛弧盆系成矿系列,对各个成矿系列的地质矿产特征进行了总结.%This paper mainly deals with new progresses that have been made in the map compilation of Oceania.The research party has compiled The Geological Map of Oceania region (1:2500000) and The Metallic Mineral Map of Oceania (1:2500000). In the manual of the map,the authors re-divided the original three primary tectonic units of Oceania into four primary tectonic units,high-lighted the importance of Mesozoic tectonic units in the Papua New Guinea-New Zealand orogenic system, and separated them from the Cenozoic tectonic unit of southwest Pacific island arc.The four primary tectonic units were redefined into 12 secondary tec-tonic units and 42 third-level units, and the corresponding stratigraphic column graphs and intrusive sequence diagrams were pre-pared.The tectonic evolution of Oceania was described in this paper.According to the metallogenic characteristics of corresponding mineralization belts,the Oceania region was divided into 4 metallogenic domains,i.e.,the central-western Australia continental Pre-cambrian cratonic metallogenic domain,the eastern Australia Paleozoic orogenic metallogenic domain,the Papua New Guinea-New Zealand Mesozoic island arc metallogenic domain and the southwestern Pacific Cenozoic archipelagic arc-basin system metallogenic domain.This paper also summarized the geological and mineral resource characteristics of each metallogenic belt.