气候变化领域集成服务门户(CCPortal): Caribbean intra-plate deformation: Paleomagnetic evidence from St. Barthélemy Island for post-Oligocene rotation in the Lesser Antilles forearc

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DOI	10.1016/j.tecto.2020.228323
	Caribbean intra-plate deformation: Paleomagnetic evidence from St. Barthélemy Island for post-Oligocene rotation in the Lesser Antilles forearc
	Philippon M.; van Hinsbergen D.J.J.; Boschman L.M.; Gossink L.A.W.; Cornée J.-J.; BouDagher-Fadel M.; Léticée J.-L.; Lebrun J.-F.; Munch P.
发表日期	2020
ISSN	00401951
卷号	777
英文摘要	As subduction zones and their related processes are often studied in 2D, or cylindrical 3D sections, the dynamic effects of trench curvature and its evolution through time remain under-explored. Whereas temporal variations in trench trend may be estimated through restoring upper plate deformation, we investigate the forearc deformation history of the strongly curved northern Lesser Antilles trench, connecting the near-orthogonal Lesser Antilles subduction zone with the Motagua-Cayman transform plate boundary. Our new paleomagnetic dataset consists of 310 cores from Eo-Oligocene magmatic rocks and limestones from St. Barthélemy Island. The limestones yielded a post-folding magnetization containing a similar magnetic direction to those stored in magmatic rocks that intrude the folded carbonates, both indicating a post-Oligocene ~15°, and perhaps up to 25° counterclockwise rotation of the island. Our results highlight that the present-day trench curvature formed progressively during the Cenozoic, allowing us to discuss different tectonic scenarios explaining NE Caribbean plate deformation, and to identify key targets for future research on tectonic architecture and the potential present-day activity of intra-plate deformation that may pose seismic hazards. © 2020
关键词	Block rotation Forearc Trench curvature
英文关键词	Lime; Limestone; Magnetization; Tectonics; Counter clockwise rotation; Deformation history; Forearc; Lesser Antilles subduction zones; Paleomagnetic evidence; Plate deformations; Temporal variation; Transform plate boundary; Deformation; block rotation; Caribbean plate; curvature; deformation mechanism; forearc basin; intraplate process; magnetic reversal; Oligocene; paleomagnetism; plate boundary; plate motion; subduction zone; tectonic setting; trench; Guadeloupe; Leeward Islands [Lesser Antilles]; Saint Barthelemy
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207846
作者单位	Géosciences Montpellier, UMR 5243, CNRS, Université des Antilles-Université de Montpellier, Campus de Fouillole, Pointe-à-Pitre, FWI 97159, France; Department of Earth Sciences, Utrecht University, Princetonlaan 8A, Utrecht, 3584 CD, Netherlands; Department of Environmental Systems Science, ETH Zürich, Universitätstrasse 16, Zürich, 8092, Switzerland; Office of the Vice-Provost (Research), 2 Taviton Street, London, WC1H 0BT, United Kingdom; Géosciences Montpellier, UMR 5243, CNRS_Université des Antilles-Université de Montpellier, Campus du Triolet, Montpellier, 34000, France
推荐引用方式 GB/T 7714	Philippon M.,van Hinsbergen D.J.J.,Boschman L.M.,et al. Caribbean intra-plate deformation: Paleomagnetic evidence from St. Barthélemy Island for post-Oligocene rotation in the Lesser Antilles forearc[J],2020,777.
APA	Philippon M..,van Hinsbergen D.J.J..,Boschman L.M..,Gossink L.A.W..,Cornée J.-J..,...&Munch P..(2020).Caribbean intra-plate deformation: Paleomagnetic evidence from St. Barthélemy Island for post-Oligocene rotation in the Lesser Antilles forearc.Tectonophysics,777.
MLA	Philippon M.,et al."Caribbean intra-plate deformation: Paleomagnetic evidence from St. Barthélemy Island for post-Oligocene rotation in the Lesser Antilles forearc".Tectonophysics 777(2020).