Intraplate brittle deformation and states of paleostress constrained by fault kinematics in the central German platform
Intraplate brittle deformation and states of paleostress constrained by fault kinematics in the central German platform
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德国中部地台断层运动学约束的板内脆性变形和古应力状态
DOI:
10.1016/j.tecto.2016.11.033
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发表时间:
2017
期刊:
影响因子:
2.9
通讯作者:
Ustaszewski
中科院分区:
文献类型:
--
作者:
Navabpour;Siegburg;Ustaszewski
The structural evolution of Central Europe reflects contrasting tectonic regimes after the Variscan orogeny during Mesozoic – Cenozoic time. The brittle deformation related to each tectonic regime is localized mainly along major fault zones, creating complex fracture patterns and kinematics through time with diverging interpretations on the number and succession of the causing events. By contrast, fracture patterns in less deformed domains often provide a pristine structural inventory. We investigate the brittle deformation of a relatively stable, wide area of the central German platform using fault-slip data to identify the regional stress fields required to satisfy the data. In a non-classical approach, and in order to avoid local stress variations and misinterpretations, the fault-slip data are scaled up throughout the study area into subsets of consistent kinematics and chronology for sedimentary cover and crystalline basement rocks. Direct stress tensor inversion was performed through an iterative refining process, and the computed stress tensors were verified using field-based observations. Criteria on relative tilt geometry and indicators of kinematic change suggest a succession of events, which begins with a post-Triassic normal faulting regime with σ3axis trending NE-SW. The deformation then follows by strike-slip and thrust faulting regimes with a change of σ1axis from N-S to NE-SW, supposedly in the Late Cretaceous. Two younger events are characterized by Cenozoic normal and oblique thrust faulting regimes with NW-SE-trending σ3and σ1axes, respectively. The fracture patterns of both the cover and basement rocks appear to record the same states of stress.
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DOI:
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发表时间:
2004
期刊:
Geological Society Special Publication
影响因子:
--
作者:
A. Zeh;H. Brätz
通讯作者:
H. Brätz
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2006
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1993
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2012
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发表时间:
2010
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作者:
P. Navabpour;J. Angelier;É. Barrier
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É. Barrier