气候变化领域集成服务门户(CCPortal): Controls by rheological structure of the lithosphere on the temporal evolution of continental magmatism: Inferences from the Pannonian Basin system

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DOI	10.1016/j.epsl.2021.116925
	Controls by rheological structure of the lithosphere on the temporal evolution of continental magmatism: Inferences from the Pannonian Basin system
	Koptev A.; Cloetingh S.; Kovács I.J.; Gerya T.; Ehlers T.A.
发表日期	2021
ISSN	0012821X
卷号	565
英文摘要	Physical-chemical controls of continental magmatism evolution remain enigmatic. Of prime and controversial nature is the temporal transition from calc-alkaline magmas to alkali basalts, correlated with a switch in tectonic regime from extension to compression. We perform 1D thermo-kinematic modelling to analyze the evolution of the thermo-rheological structure of the lithosphere in such settings using the Northwestern Pannonian Basin as a test-bed. Given well-known evidence for major reduction of brittle deformation parameters due to melt-related softening, we use a relatively low internal angle of friction. We demonstrate that at the termination of extension, the presence of intra-crustal low-viscosity layers in the lithosphere provides optimal condition for emplacement and differentiation of intermediate crustal magmatic chambers along the pathway of deep-sourced basaltic melts. In contrast, subsequent lithosphere cooling after the end of extension combined with tectonic and magmatic thickening lead to a disappearance of the low-viscosity layers and formation of lithospheric-scale faults. The latter serve as conduits for rapid ascent of uncontaminated alkali basaltic melts from the mantle to the surface. These findings shed new light on the geodynamic controls of magmatism in extensional settings. © 2021 The Authors
关键词	alkali basalts continental magmatism lithosphere rheology melting Pannonian Basin system thermo-kinematic modelling
英文关键词	Alkalinity; Basalt; Elasticity; Geodynamics; Kinematics; Rheology; Tectonics; Viscosity; Alkali basalt; Basaltic melts; Continental magmatism; Crustals; Lithosphere rheology; Low viscosity; Magmatisms; Pannonian basin; Pannonian basin system; Thermo-kinematic modeling; Melting; alkali basalt; continental lithosphere; emplacement; lithospheric structure; magma; magmatism; melting; rheology; temporal evolution; Pannonian Basin
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/203171
作者单位	University of Tübingen, Department of Geosciences, Tübingen, Germany; Utrecht University, Tectonics Research Group, Utrecht, Netherlands; MTA EK Lendület Pannon LitH2Oscope Research Group, Budapest, Hungary; CSFK Geodetic and Geophysical Institute, Sopron, Hungary; Centre for Energy Research, Institute for Energy Security and Environmental Safety, Budapest, Hungary; Institute of Geophysics, Department of Earth Sciences, ETH-Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Koptev A.,Cloetingh S.,Kovács I.J.,et al. Controls by rheological structure of the lithosphere on the temporal evolution of continental magmatism: Inferences from the Pannonian Basin system[J],2021,565.
APA	Koptev A.,Cloetingh S.,Kovács I.J.,Gerya T.,&Ehlers T.A..(2021).Controls by rheological structure of the lithosphere on the temporal evolution of continental magmatism: Inferences from the Pannonian Basin system.Earth and Planetary Science Letters,565.
MLA	Koptev A.,et al."Controls by rheological structure of the lithosphere on the temporal evolution of continental magmatism: Inferences from the Pannonian Basin system".Earth and Planetary Science Letters 565(2021).