Remnant Paleoproterozoic Subduction or Lithospheric Drip Initiation at the Yilgarn Craton Margin:Constraints from P-wave Tomography  

作　　者：XU Xiaobing WANG Kun YANG Dinghui ZHAO Liang YUAN Huaiyu 

机构地区：[1]Department of Mathematical Sciences,Tsinghua University,Beijing 100084,China [2]Institute of Geophysics,China Earthquake Administration,Beijing 100081,China [3]State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [4]University of Chinese Academy of Sciences,Beijing 100086,China [5]ARC Centre of Excellence for Core to Crust Fluid Systems,Department of Earth and Environmental Sciences,Macquarie University,North Ryde,NSW 2109,Australia [6]Centre for Exploration Targeting,University of Western Australia,Crawley Perth,WA 6009,Australia

出　　处：《Acta Geologica Sinica(English Edition)》2024年第S01期72-74,共3页地质学报（英文版）

摘　　要：The Paleoproterozoic was a critical time in whether modern-style plate tectonics had become globally dominant(e.g.,Wan et al.,2020).The Capricorn Orogen witnessed the assembly of the Pilbara and Yilgarn Cratons and an exotic microcontinent,the Glenburgh Terrane,to form the West Australia Craton(WAC)through two collisional orogenic events,the 2215–2145 Ma Ophthalmian and 2005–1950 Ma Glenburgh Orogenies(Johnson et al.,2013;Fig.1).Compared to other Proterozoic orogenic belts in Australia,the Capricorn Orogen preserves‘complete'opposing continental margin successions,together with intervening arc fragments associated with oceanic closure and foreland basins associated with collisional loading(Cawood et al.,2009).

关 键 词：P-wave tomography finite-frequency method SUBDUCTION Capricorn Orogen 

分 类 号：P542[天文地球—构造地质学]