气候变化领域集成服务门户(CCPortal): Direct dating of brittle extensional deformation contemporaneous of Neogene exhumation of the internal zones of the Rif Chain

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DOI	10.1016/j.tecto.2021.228800
	Direct dating of brittle extensional deformation contemporaneous of Neogene exhumation of the internal zones of the Rif Chain
	Münch P.; Caillaud J.; Monié P.; Grauby O.; Corsini M.; Ricci J.; Romagny A.; Philippon M.; Lanson B.; Azdimousa A.; Ben Moussa A.; Arnaud N.
发表日期	2021
ISSN	00401951
卷号	807
英文摘要	The brittle deformation of internal zones of the Rif chain, corresponding to the southern margin of the West Alboran Basin, is not or poorly dated because of the lack of stratigraphic constraints. We provide for the first time a direct dating of brittle deformation of internal zones of the Rif chain, in the Ceuta peninsula located in the westernmost part of the Gibraltar arc. 40Ar/39Ar illite ages from fault gouges in the footwall and hanging wall of the Ceuta Shear Zone range from 11.9 ± 2.5 Ma to 15.7 ± 1.7 Ma and from 14.7 ± 0.1 Ma to 18.9 ± 0.8 Ma, respectively. In addition, (U–Th)/He apatite ages from both units have been measured. They are younger in the hangingwall (~20–21 Ma) than in the footwall (14–19 Ma), which highlights slightly different cooling histories. Thus, we interpret the illite ages to date growth of authigenic illite (1M polytype) during exhumation through the top few kilometers of the earth's surface. This study of brittle deformation within the internal zones of the Rif chain reveals that an E-W directed extension occurred between ~18–15 Ma during the low temperature exhumation of Sebtide-Alpujárride units. From 15 to 11 Ma, the direction of extension shifted to NNW-SSE and only minor steep normal faults occurred. Brittle normal faulting occurred during a stage of slow cooling (~1–2 °C/myr) starting at ~19 Ma and coeval with exhumation processes within the uppermost levels of the continental crust. These new data emphasize a continuum of extensional deformation during the Burdigalian–Serravalian interval with an early E-W directed phase and then a NNW-SSE directed phase that match well the main subsidence pulses identified offshore in the neighboring West Alboran Basin. © 2021 Elsevier B.V.
关键词	40Ar/39Ar dating Brittle-deformation Fault gouge dating Low-T thermochronology Rif chain
英文关键词	Fault slips; Offshore oil well production; Phosphate minerals; Stratigraphy; Temperature; Authigenic illites; Brittle deformation; Continental crusts; Cooling history; Earth's surface; Extensional deformation; Low temperatures; Normal faulting; Deformation; argon-argon dating; brittle deformation; exhumation; fault gouge; illite; Neogene; normal fault; thermochronology; Alboran Sea; Mediterranean Sea
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/208037
作者单位	Géosciences Montpellier, Université de Montpellier-CNRS-Université des Antilles, CC 060, place Eugène Bataillon, Montpellier cédex 5, 34095, France; Université Littoral Côte d'Opale, Univ. Lille, CNRS, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, Wimereux, F62930, France; Aix-Marseille Université – UMR 7325 CINaM/CNRS, campus de Luminy, Case 913, Marseille Cedex 9, 13288, France; Université Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, IRD, Géoazur, 250, rue Albert Einstein, Sophia Antipolis, 06560, France; 4, rue du Lavoir, Drap, 06340, France; Géosciences Montpellier, Université de Montpellier-CNRS-Université des Antilles, Campus de Fouillole, Pointe-à-Pitre, FWI 97159, France; Université Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, Univ. Gustave Eiffel, ISTerre, Grenoble, F-38000, France; Faculté Pluridisciplinaire de Nador & Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed I, Oujda, Morocco; Département de Géologie, Université Abdelmalek Esa...
推荐引用方式 GB/T 7714	Münch P.,Caillaud J.,Monié P.,et al. Direct dating of brittle extensional deformation contemporaneous of Neogene exhumation of the internal zones of the Rif Chain[J],2021,807.
APA	Münch P..,Caillaud J..,Monié P..,Grauby O..,Corsini M..,...&Arnaud N..(2021).Direct dating of brittle extensional deformation contemporaneous of Neogene exhumation of the internal zones of the Rif Chain.Tectonophysics,807.
MLA	Münch P.,et al."Direct dating of brittle extensional deformation contemporaneous of Neogene exhumation of the internal zones of the Rif Chain".Tectonophysics 807(2021).