气候变化领域集成服务门户(CCPortal): Structural style and neotectonic activity along the Harz Boundary Fault; northern Germany: a multimethod approach integrating geophysics; outcrop data and numerical simulations

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DOI	10.1007/s00531-020-01874-0
	Structural style and neotectonic activity along the Harz Boundary Fault; northern Germany: a multimethod approach integrating geophysics; outcrop data and numerical simulations
	Müller K.; Polom U.; Winsemann J.; Steffen H.; Tsukamoto S.; Günther T.; Igel J.; Spies T.; Lege T.; Frechen M.; Franzke H.-J.; Brandes C.
发表日期	2020
ISSN	14373254
起始页码	1811
结束页码	1835
卷号	109 期号:5
英文摘要	We present new evidence for neotectonic activity along the Harz Boundary Fault, a Cretaceous reverse fault that represents a key structure in northern Germany. For the fault analysis, we use a multimethod approach, integrating outcrop data, luminescene dating, shear wave seismics, electrical resistivity tomography (ERT) and numerical simulations. A recent sinkhole at the SSW-ward dipping and WNW–ESE striking Harz Boundary Fault exposes a NNE-ward dipping and WNW–ESE striking planar fault surface that cuts through unconsolidated debris-flow deposits thus pointing to young Lateglacial tectonic activity. The fault shows a polyphase evolution with initial normal fault movement and a later reactivation as an oblique fault with reverse and strike-slip components. A shear wave seismic profile was acquired to analyse the geometry of the fault and show that the Harz Boundary Fault is steeply dipping and likely has branches. Partly, these branches propagate into overlying alluvial-fan deposits that are probably Pleniglacial to Lateglacial in age. The outcrop data in combination with the seismic data give evidence for a splay fault system with steep back-thrusts. One of these back-thrusts is most likely the NNE-ward dipping fault that is exposed in the sinkhole. The lateral extent of the fault was mapped with electrical resistivity tomography (ERT) profiles. The timing of fault movement was estimated based on optically stimulated luminescence dating of the faulted debris-flow deposits using both quartz and feldspar minerals. Consistent feldspar and quartz ages indicate a good bleaching of the sediment prior to deposition. The results imply fault movements post-dating ~ 15 ka. Numerical simulations of glacio isostatic adjustment (GIA)-related changes in the Coulomb failure stress regime at the Harz Boundary Fault underpin the assumption that the fault was reactivated during the Lateglacial due to stress changes induced by the decay of the Late Pleistocene (Weichselian) Fennoscandian ice sheet. © 2020, The Author(s).
英文关键词	Electrical resistivity tomography (ERT); Glacial isostatic adjustment (GIA); Harz Boundary Fault; Lateglacial; Luminescence dating; Neotectonics; Northern Germany; Numerical simulations; Shear wave seismics
语种	英语
scopus关键词	computer simulation; fault zone; geophysical survey; ice sheet; integrated approach; neotectonics; numerical model; reverse fault; stress field; structural geology; tectonic setting; Weichselian; Fennoscandia; Germany
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/147651
作者单位	Institut für Geologie, Leibniz Universität Hannover, Callinstr. 30, Hannover, 30167, Germany; Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, Hannover, 30655, Germany; Lantmäteriet, Geodetic Infrastructure, Referenssystem, Lantmäterivägen 2C, Gävle, 80102, Sweden; Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, Hannover, 30655, Germany; Institut für Geologie und Paläontologie, Technischen Universität Clausthal, Leibnizstraße 10, Clausthal-Zellerfeld, 38678, Germany
推荐引用方式 GB/T 7714	Müller K.,Polom U.,Winsemann J.,et al. Structural style and neotectonic activity along the Harz Boundary Fault; northern Germany: a multimethod approach integrating geophysics; outcrop data and numerical simulations[J],2020,109(5).
APA	Müller K..,Polom U..,Winsemann J..,Steffen H..,Tsukamoto S..,...&Brandes C..(2020).Structural style and neotectonic activity along the Harz Boundary Fault; northern Germany: a multimethod approach integrating geophysics; outcrop data and numerical simulations.International Journal of Earth Sciences,109(5).
MLA	Müller K.,et al."Structural style and neotectonic activity along the Harz Boundary Fault; northern Germany: a multimethod approach integrating geophysics; outcrop data and numerical simulations".International Journal of Earth Sciences 109.5(2020).