Mechanical stratigraphy and normal faulting
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- 作者：David A. Ferrill ; dferrill@swri.org ; Alan P. Morris ; Ronald N. McGinnis ; Kevin J. Smart ; Sarah S. Wigginton ; Nicola J. Hill
- 关键词：Mechanical stratigraphy ; Normal fault ; Refraction ; Dilation ; Slip tendency ; Friction ; Fault tip ; Monocline
- 刊名：Journal of Structural Geology
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：94
- 期：Complete
- 页码：275-302
- 全文大小：15197 K
- 卷排序：94
文摘
Mechanical stratigraphy encompasses the mechanical properties, thicknesses, and interface properties of rock units. Although mechanical stratigraphy often relates directly to lithostratigraphy, lithologic description alone does not adequately describe mechanical behavior. Analyses of normal faults with displacements of millimeters to 10's of kilometers in mechanically layered rocks reveal that mechanical stratigraphy influences nucleation, failure mode, fault geometry, displacement gradient, displacement distribution, fault core and damage zone characteristics, and fault zone deformation processes. The relationship between normal faulting and mechanical stratigraphy can be used either to predict structural style using knowledge of mechanical stratigraphy, or conversely to interpret mechanical stratigraphy based on characterization of the structural style. This review paper explores a range of mechanical stratigraphic controls on normal faulting illustrated by natural and modeled examples.