气候变化领域集成服务门户(CCPortal): Late Ediacaran paleogeography of Avalonia and the Cambrian assembly of West Gondwana

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DOI	10.1016/j.epsl.2020.116591
	Late Ediacaran paleogeography of Avalonia and the Cambrian assembly of West Gondwana
	Wen B.; Evans D.A.D.; Anderson R.P.; McCausland P.J.A.
发表日期	2020
ISSN	0012821X
卷号	552
英文摘要	The latest Proterozoic tectonic evolution of Avalonia, one of the largest peri-Gondwanan terranes, bears on the issue of Gondwana amalgamation during the transition from Rodinia to Pangea. New paleomagnetic results from mid–late Ediacaran strata in the Newfoundland sector of Avalonia confirm substantial apparent motion of that terrane between ca. 590 and 560 Ma, consistent with a true polar wander interpretation for that interval. When the Avalonian poles are mapped onto complementary paleomagnetic records from West Africa and Laurentia, the Avalonia terrane may occupy any of four possible positions, all of which are far-removed from those cratons. Choosing the most kinematically parsimonious location leading toward Gondwana assembly, we find that Avalonia was most likely proximal to Amazonia during the Ediacaran–Cambrian transition, with a substantial (∼3000 km) separation between Amazonia and West Africa at that time. Our results thus favor the existence of a wide Clymene Ocean and subsequent Cambrian final assembly of West Gondwana, providing a key snapshot onto the evolving Rodinia-Gondwana supercontinental transition. © 2020 Elsevier B.V.
关键词	Avalonia terrane Clymene Ocean paleomagnetism true polar wander West Gondwana
英文关键词	Metals; Apparent motion; Final assembly; Newfoundlands; Paleogeography; Paleomagnetic record; Tectonic evolution; True Polar Wander; West Gondwana; Geomagnetism; Avalonia; Cambrian; Ediacaran; Gondwana; paleogeography; paleomagnetism; polar wandering; Rodinia; Canada; Laurentian Mountains; Newfoundland; Newfoundland and Labrador; Quebec [Canada]; West Africa
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202966
作者单位	Department of Earth and Planetary Sciences, Yale University, 210 Whitney Avenue, New Haven, CT 06520-8109, United States; State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; All Souls College, University of Oxford, Oxford, OX1 4AL, United Kingdom; Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, United Kingdom; Western Paleomagnetic and Petrophysical Laboratory, Department of Earth Sciences, University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
推荐引用方式 GB/T 7714	Wen B.,Evans D.A.D.,Anderson R.P.,et al. Late Ediacaran paleogeography of Avalonia and the Cambrian assembly of West Gondwana[J],2020,552.
APA	Wen B.,Evans D.A.D.,Anderson R.P.,&McCausland P.J.A..(2020).Late Ediacaran paleogeography of Avalonia and the Cambrian assembly of West Gondwana.Earth and Planetary Science Letters,552.
MLA	Wen B.,et al."Late Ediacaran paleogeography of Avalonia and the Cambrian assembly of West Gondwana".Earth and Planetary Science Letters 552(2020).