气候变化领域集成服务门户(CCPortal): A New Reconstruction for Permian East Gondwana Based on Zircon Data From Ophiolite of the East Australian Great Serpentinite Belt

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DOI	10.1029/2020GL090293
	A New Reconstruction for Permian East Gondwana Based on Zircon Data From Ophiolite of the East Australian Great Serpentinite Belt
	Milan L.A.; Belousova E.A.; Glen R.A.; Chapman T.; Kalmbach J.; Fu B.; Ashley P.M.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:1
英文摘要	The Great Serpentinite Belt of eastern Australia is a ∼1500 km long dismembered ophiolite assumed to be Cambrian based on studies of small (typically <50 m2) exotic meta-igneous inclusions despite contrasting ages (Cambrian—Devonian) and complex P-T histories. To overcome these issues, we studied a ∼18 km2 coherent block of dismembered ophiolite that provides robust geological context to sampling the ophiolite. Zircon U-Pb-Hf-O isotope and trace analyses from three plagiogranite dykes cutting massive gabbro confirm ∼283–277 Ma ages and a mantle source. As a result, we argue older Cambrian to Devonian plagiogranite and subducted blocks were inherited from previous subduction events in eastern Australia. These findings allow us to match the Great Serpentinite Belt with the contemporary Dun Mountain ophiolite (New Zealand) and the Koh ophiolite (New Caledonia), thus supporting a new, integrated Pacific Gondwana margin paleogeography involving multiple arcs and subduction zones. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Belts; Hafnium compounds; Lead compounds; Magnesite; Silicate minerals; Zircon; Coherent blocks; Eastern Australia; Mantle source; New Caledonia; Paleogeography; Serpentinite; Subduction zones; Zircon U-Pb; Uranium compounds
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169255
作者单位	Division of Earth Sciences, School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia; Australian Research Council Centre of Excellence for Core to Crust Fluid Systems (CCFS)/GEMOC, Department of Earth and Environmental Sciences, Macquarie University, Macquarie, NSW, Australia; Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	Milan L.A.,Belousova E.A.,Glen R.A.,et al. A New Reconstruction for Permian East Gondwana Based on Zircon Data From Ophiolite of the East Australian Great Serpentinite Belt[J],2021,48(1).
APA	Milan L.A..,Belousova E.A..,Glen R.A..,Chapman T..,Kalmbach J..,...&Ashley P.M..(2021).A New Reconstruction for Permian East Gondwana Based on Zircon Data From Ophiolite of the East Australian Great Serpentinite Belt.Geophysical Research Letters,48(1).
MLA	Milan L.A.,et al."A New Reconstruction for Permian East Gondwana Based on Zircon Data From Ophiolite of the East Australian Great Serpentinite Belt".Geophysical Research Letters 48.1(2021).