气候变化领域集成服务门户(CCPortal): The Grès Singuliers of the Mont Blanc region (France and Switzerland): stratigraphic response to rifting and crustal necking in the Alpine Tethys

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DOI	10.1007/s00531-020-01902-z
	The Grès Singuliers of the Mont Blanc region (France and Switzerland): stratigraphic response to rifting and crustal necking in the Alpine Tethys
	Ribes C.; Ghienne J.-F.; Manatschal G.; Dall’Asta N.; Stockli D.F.; Galster F.; Gillard M.; Karner G.D.
发表日期	2020
ISSN	14373254
起始页码	2325
结束页码	2352
卷号	109 期号:7
英文摘要	The Grès Singuliers unit represents an anomalous occurrence of a siliciclastic-dominated sedimentary system typifying a restricted geographic area around the Mont Blanc massif. Deposited during Early Jurassic rifting, this unit was influenced by the tectonic processes responsible for its development. This contribution integrates and reconciles sedimentological, stratigraphic and tectonic data and discusses the tectono-sedimentary evolution of the Mont Blanc basement and its autochthonous sedimentary cover. Based on depositional facies, a petrographic and detrital zircon provenance analysis, we propose that the Grès Singuliers unit is mainly derived from erosion of the local basement and pre-rift sedimentary cover. Furthermore, recognition of Jurassic cataclasites and black gouges capping the Mont Blanc basement confirms the hypothesis that the Mont Blanc domain formed an extensional core complex. The source to sink relationship between the Mont Blanc detachment system and the Grès Singuliers unit, as well as timing and location within the Alpine rift system, allows us to interpret this unit as the syn-tectonic sedimentary response to crustal necking, responsible for the onset of localized severe crustal/lithospheric thinning in the European margin of the Alpine Tethys rift system. The main result of this study was to show that the exhumation and uplift of basement during crustal/lithospheric necking produced a new source area for clastic sedimentary systems. Therefore, the local occurrence of a siliciclastic unit similar to the Grès Singuliers along passive margins may be symptomatic of necking zones in other rift systems. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Alpine Tethys margin; Grès Singuliers; Mont Blanc massif; Necking; Syn-rift
语种	英语
scopus关键词	crustal structure; Jurassic; passive margin; rifting; structural geology; syntectonic sediment; tectonic evolution; tectonic setting; tectonostratigraphy; Tethys; Alps; Haute Savoie; Mont Blanc; Savoy Alps; Switzerland; Western Alps
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147627
作者单位	Centre National de la Recherche Scientifique (CNRS UMR7516) – Institut de Physique du Globe de Strasbourg (IPGS) – Ecole et Observatoire des Sciences de la Terre (EOST), Université de Strasbourg, 1 rue Blessig, Strasbourg, 67084, France; Department of Geological Sciences, University of Texas, Austin, TX 78712, United States; Institut des Sciences de la Terre Paris, Sorbonne Université, Paris, 75005, France; ExxonMobil Upstream Integrated Solutions Company, Global Tectonics and Structure, 22777 Springwoods Village Parkway, Spring, TX 77389, United States; C.R., TOTAL S.A., CSTJF, Avenue Larribau, Pau, 64000, France
推荐引用方式 GB/T 7714	Ribes C.,Ghienne J.-F.,Manatschal G.,et al. The Grès Singuliers of the Mont Blanc region (France and Switzerland): stratigraphic response to rifting and crustal necking in the Alpine Tethys[J],2020,109(7).
APA	Ribes C..,Ghienne J.-F..,Manatschal G..,Dall’Asta N..,Stockli D.F..,...&Karner G.D..(2020).The Grès Singuliers of the Mont Blanc region (France and Switzerland): stratigraphic response to rifting and crustal necking in the Alpine Tethys.International Journal of Earth Sciences,109(7).
MLA	Ribes C.,et al."The Grès Singuliers of the Mont Blanc region (France and Switzerland): stratigraphic response to rifting and crustal necking in the Alpine Tethys".International Journal of Earth Sciences 109.7(2020).