气候变化领域集成服务门户(CCPortal): Slab break-offs in the Alpine subduction zone

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DOI	10.1007/s00531-020-01821-z
	Slab break-offs in the Alpine subduction zone
	Kästle E.D.; Rosenberg C.; Boschi L.; Bellahsen N.; Meier T.; El-Sharkawy A.
发表日期	2020
ISSN	14373254
起始页码	587
结束页码	603
卷号	109 期号:2
英文摘要	After the onset of plate collision in the Alps, at 32–34 Ma, the deep structure of the orogen is inferred to have changed dramatically: European plate break-offs in various places of the Alpine arc, as well as a possible reversal of subduction polarity in the eastern Alps have been proposed. We review different high-resolution tomographic studies of the upper mantle and combine shear- and body-wave models to assess the most reliable geometries of the slabs. Several hypotheses for the tectonic evolution are presented and tested against the tomographic model interpretations and constraints from geologic and geodetic observations. We favor the interpretation of a recent European slab break-off under the western Alps. In the eastern Alps, we review three published scenarios for the subduction structure and propose a fourth one to reconcile the results from tomography and geology. We suggest that the fast slab anomalies are mainly due to European subduction; Adriatic subduction plays no or only a minor role along the Tauern window sections, possibly increasing towards the Dinarides. The apparent northward dip of the slab under the eastern Alps may be caused by imaging a combination of Adriatic slab, from the Dinaric subduction system, and a deeper lying European one, as well as by an overturned, retreating European slab. © 2020, The Author(s).
英文关键词	Alpine subduction system; Seismic tomography; Slab break-off; Slab polarity reversal; Subduction slabs
语种	英语
scopus关键词	collision zone; Eurasian plate; magnetic reversal; orogeny; seismic tomography; slab; subduction zone; tectonic evolution; 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/147715
作者单位	Institute of Geological Sciences, Freie Universität Berlin, Malteserstr, 74-100, Berlin, 12249, Germany; Institut Des Sciences de la Terre, Paris (iSTeP), Sorbonne Université, Paris, France; Dipartimento di Geoscienze, Università degli Studi di Padova, Padua, Italy; Christian Albrechts Universität, Kiel, Germany; National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, 11421, Egypt
推荐引用方式 GB/T 7714	Kästle E.D.,Rosenberg C.,Boschi L.,et al. Slab break-offs in the Alpine subduction zone[J],2020,109(2).
APA	Kästle E.D.,Rosenberg C.,Boschi L.,Bellahsen N.,Meier T.,&El-Sharkawy A..(2020).Slab break-offs in the Alpine subduction zone.International Journal of Earth Sciences,109(2).
MLA	Kästle E.D.,et al."Slab break-offs in the Alpine subduction zone".International Journal of Earth Sciences 109.2(2020).