大洋洲地区地质矿产编图新进展

New progress of geology and mineral resources mapping in Oceania

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,highlighted 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 tectonic units and 42 third-level units,and the corresponding stratigraphic column graphs and intrusive sequence diagrams were prepared.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 Precambrian 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.