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Characteristics of tectonic deformation of the melange zone in the Lachlan Orogen along eastern coast of Australia

China Geology 2019年第4期2卷 478-492页

作者： Dong-sheng Wang Zong-qi Wang Gang Wang Xian-qing Guo Yu-dong Wu Ministry of Natural Resources Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing100037China

The Narooma-Batemans Bay(NBB)area along the southeast coast of Australia is a part of the eastern zone of the Early Paleozoic Lachlan *** the NBB,a set of rock association consisting of turbidites,siliceous rock,basic lava,and argillaceous melange zone is mainly *** to systematic field geological survey,the deformation of 3 stages(D1,D2,and D3)was identified in the *** stage D1,with the original bedding S0 in a nearly east-west trending as the deformation plane,tight folds,isoclinal folds,and other structures formed in the NBB accompanied by structural *** a result,crenulation cleavage developed along the axial plane of the folds and schistosity S1 *** stage D2,with north-south-trending schistosity S1 as the deformation plane,a large number of asymmetrical folds and rotated porphyroclasts formed owing to thrusting and *** stage D3,leftlateral strike-slip occurred along the main north-south-trending *** on the analysis of the characteristics of tectonic deformation in the NBB and summary of previous research results,it is determined that the early-stage(D1)deformation is related to Ordovician Macquarie arc-continent collision and the deformation at stages D2 and D3 is the result of the westward subduction of Paleo-Pacific *** is,it is not the continuous westward subduction of the Paleo-Pacific Plate that constitutes the evolution model of the NBB as previously considered.

关键词： Australia Narooma-Batemans Bay Melanges Tectonic deformation Lachlan Orogen Early Paleozoic arc-continent collision

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Origin of the serpentinites in the Lichi melange,eastem Taiwan,China:implication from petrology and geochronology

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China Geology 2018年第4期1卷 477-484页

作者： Long Huang Wei Geng Zhi-lei Sun Qingdao Institute of Marine Geology Qingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China The Key Laboratory of Gas Hydrate Ministry of Land and ResourcesQingdao 266071China

Lichi melange,located in the southern coastal range,eastern Taiwan,China,is a typical tectonic melange of the plate's boundary zone between the Eurasian Plate and the Philippine Sea *** formed during the collision of the Luzon arc with the Eurasian continent (arc-continent collision).It is composed of sandstone and/or mudstone matrix and many kinds and sizes of rock fragments,including some sedimentary rocks,volcanic rocks and a few metamorphic *** serpentinite is one of the common fragments in the Lichi *** the petrographic characteristics and the zircon U-Pb chronology analyses,protolith of the serpentinite is peridotite,the age is 17.7 ±0.5 *** the tectonic background into account,it is inferred that the serpentinite (serpentinised peridotite)come from the forearc basin (the North Luzon Trough)and was taken into the melange by a second thrust *** origin of the serpentimte in Lichi melange is helpful to understand the formation of the Lichi melange and can provide reliable detailed information for the study of the arc-continent collision orogenic activity in and offshore Taiwan.

关键词： Lichi melange Serpentinite arc-continent collision Taiwan U-Pb geochronology

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洋盆封闭后我们有时所忽视的东西:以澳大利亚东部的显生宇为例(英文)

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地球学报 2012年第S1期33卷 1-1页

作者： Jonathan C.AITCHISON School of Geosciences University of SydneyAustralia

The prevailing ’consensus’ explanation for Phanerozoic development of eastern Australia envisages a ’retreating accretionary orogen’ in which episodic slab retreat resulted in development of offshore island arcs i... 详细信息

关键词： arc-continent collision quantum tectonics eastern Australia Phanerozoic

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