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Australian-derived detrital zircons in the Permian-Triassic Gympie terrane (eastern Australia): Evidence for an autochthonous origin

文献类型：期刊论文

作者Li, Pengfei1,2; Rosenbaum, Gideon2; Yang, Jin-Hui3; Hoy, Derek2
刊名TECTONICS
出版日期2015-05-01
卷号34期号:5页码:858-874
关键词Gympie terrane New England Orogen eastern Australia detrital zircon Tasmanides exotic terrane
DOI10.1002/2015TC003829
文献子类Article
英文摘要The Tasmanides in eastern Australia record accretionary processes along the eastern Gondwana margin during the Phanerozoic. The Gympie terrane is the easternmost segment of the Tasmanides, but whether its origin was autochthonous or allochthonous is a matter of debate. We present U-Pb ages of detrital zircons from Permian and Triassic sedimentary rocks of the Gympie terrane with the aim of tracing the source of the sediments and constraining their tectonic relationships with the Tasmanides. Our results show that the Permian stratigraphic units from the Gympie terrane mainly contain Carboniferous and Permian detrital zircons with dominant age peaks at similar to 263Ma, similar to 300Ma, similar to 310Ma, and similar to 330Ma. The provenance ages of the Triassic sedimentary units are similar (similar to 256Ma, similar to 295Ma, and similar to 328Ma) with an additional younger age peak of similar to 240Ma. This pattern of provenance ages from the Gympie terrane is correlative to episodes of magmatism in the adjacent component of the Tasmanides (New England Orogen), indicating that the detrital zircons were dominantly derived from the Australian continent. Given the widespread input of detrital zircons from the Tasmanides, we think that the sedimentary sequence of the Gympie terrane was deposited along the margin of the eastern Australian continent, possibly in association with a Permo-Triassic continental arc system. Our results do not show evidence for an exotic origin of the Gympie terrane, indicating that similarly to the vast majority of the Tasmanides, the Gympie terrane was genetically linked to the Australian continent.
WOS关键词NEW-ENGLAND OROGEN ; NEW-SOUTH-WALES ; PLASMA-MASS SPECTROMETRY ; U-PB ; HF ISOTOPES ; NEW-ZEALAND ; FOLD BELT ; PROVENANCE COMPARISONS ; CONTINENTAL ACCRETION ; STRUCTURAL EVIDENCE
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000356621800003
资助机构Australian Research Council(DP130100130) ; Australian Research Council(DP130100130) ; Australian Research Council(DP130100130) ; Australian Research Council(DP130100130)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62356]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
2.Univ Queensland, Sch Earth Sci, Brisbane, Qld, Australia
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Pengfei,Rosenbaum, Gideon,Yang, Jin-Hui,et al. Australian-derived detrital zircons in the Permian-Triassic Gympie terrane (eastern Australia): Evidence for an autochthonous origin[J]. TECTONICS,2015,34(5):858-874.
APA Li, Pengfei,Rosenbaum, Gideon,Yang, Jin-Hui,&Hoy, Derek.(2015).Australian-derived detrital zircons in the Permian-Triassic Gympie terrane (eastern Australia): Evidence for an autochthonous origin.TECTONICS,34(5),858-874.
MLA Li, Pengfei,et al."Australian-derived detrital zircons in the Permian-Triassic Gympie terrane (eastern Australia): Evidence for an autochthonous origin".TECTONICS 34.5(2015):858-874.

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来源：地质与地球物理研究所

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