气候变化领域集成服务门户(CCPortal): Tilting, uplift, volcanism and disintegration of the South German block

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DOI	10.1016/j.tecto.2020.228611
	Tilting, uplift, volcanism and disintegration of the South German block
	Ring U.; Bolhar R.
发表日期	2020
ISSN	00401951
卷号	795
英文摘要	We present a large set of fault-slip data together with six U[sbnd]Pb ages on calcite vein fillings constraining the kinematics and timing of near-surface (uppermost 2–3 km of crust) faulting of the uplifted South German block in the northern foreland of the NW-ward advancing Alps. The structural data confirm earlier studies showing Miocene subhorizontal NE-directed extension with shortening mainly being subvertical but also subhorizontally NW oriented. The U[sbnd]Pb ages are between 15.3 ± 0.2 and 2.3 ± 1.1 Ma (2σ analytical uncertainty) and date kinematically coordinated normal and strike-slip faulting in the northern Alpine foreland. The faults in the South German block have limited strike lengths indicating that they do not cut deeply into the crust. However, the faults appear to control volcanic centers, the melts of which originated at the base of the lithosphere. We suggest that the Miocene faults could tap the mantle because they reactivated formerly deep-seated faults. The ages for near-surface faulting are coeval with eruption of the Urach and Hegau volcanics. Published data suggest that Alpine shortening induced large-wavelength lithospheric folding in the foreland since 18–16 Ma. Volcanism in the South German block focussed along a lithospheric antiform which is, in part, superimposed on the foreland bulge of the Alps. We propose a close link between progressive southward tilting, uplift and faulting of the South German block due to lithospheric-scale folding and upward flow of the asthenosphere, flexure of the lithosphere, deep-seated volcanism and the NW-ward advancing Alps. © 2020 The Authors
英文关键词	Calcite; Disintegration; Lead compounds; Strike-slip faults; Analytical uncertainty; Calcite veins; Fault-slip datum; Lithospheric; Near surfaces; Strike slip faulting; Structural data; Volcanic centers; Fault slips; calcite; fault slip; structural geology; tilt; uplift; uranium-lead dating; vein (geology); volcanism; Alps; Germany
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/207864
作者单位	Department of Geological Sciences, Stockholm University, Stockholm, 10691, Sweden; School of Geosciences, University of the Witwatersrand, Braamfontein, 2001, South Africa
推荐引用方式 GB/T 7714	Ring U.,Bolhar R.. Tilting, uplift, volcanism and disintegration of the South German block[J],2020,795.
APA	Ring U.,&Bolhar R..(2020).Tilting, uplift, volcanism and disintegration of the South German block.Tectonophysics,795.
MLA	Ring U.,et al."Tilting, uplift, volcanism and disintegration of the South German block".Tectonophysics 795(2020).