Computer modelling and visualisation of the structural deformation caused by movement along geological faults

被引:52
作者
Egan, SS [1 ]
Kane, S [1 ]
Buddin, TS [1 ]
Williams, GD [1 ]
Hodgetts, D [1 ]
机构
[1] Univ Keele, Dept Earth Sci, Basic Dynam Grp, Keele ST5 5BG, Staffs, England
关键词
Chevron construction; inclined shear; fault-bend folding; flexural flattening;
D O I
10.1016/S0098-3004(98)00125-3
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
The computer modelling and visualisation of deformation caused by movement along faults has enhanced our understanding of the evolution of fault-related structures in the geological record. In particular, the development of computer software to carry out structural restoration and section balancing has provided earth scientists with an effective tool for validating structural interpretations constructed from geological and geophysical data. This paper describes both two- and three-dimensional geometric methods for modelling hanging wall deformation in response to fault movement. Equations are presented for the definition of two-dimensional fault geometries and for the determination of hanging wall geometry following movement over these faults. The Chevron and inclined shear constructions and fault-bend fold theory are described in a format to enable easy conversion into computer algorithms. The modelling of fault movement in three-dimensions is also considered in the context of the Chevron construction. Schematic models are presented which show hanging wall deformation caused by extensional, compressional and, most importantly, strike-slip movement over a complex fault surface. In addition, a new geometric technique for the restoration of deformed hanging wall surfaces is described. This technique has been called flexural flattening and involves flattening a surface represented as a mesh of triangles, back to horizontal. It has the advantages of maintaining the area of the surface before and after restoration and is relatively simple to apply in comparison to three-dimensional implementations of existing geometric methods. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:283 / 297
页数:15
相关论文
共 18 条
[1]  
ANASTASIA DJ, 1997, J STRUCTURAL GEOLOGY, V19
[2]   A sensitivity analysis of 3-dimensional restoration techniques using vertical and inclined shear constructions [J].
Buddin, TS ;
Kane, SJ ;
Williams, GD ;
Egan, SS .
TECTONOPHYSICS, 1997, 269 (1-2) :33-50
[3]  
CHESTER J, 1990, J STRUCTURAL GEOLOGY, V13, P903
[4]   BALANCED CROSS SECTIONS [J].
DAHLSTROM, CD .
CANADIAN JOURNAL OF EARTH SCIENCES, 1969, 6 (4P1) :743-+
[5]  
Egan S.S., 1997, Proceedings of the 1996 Geoscience Information Group Conference on Geological Visualization, Electronic Geology, V, V1, P67
[6]   STRUCTURAL EVOLUTION OF EXTENSIONAL BASIN MARGINS [J].
GIBBS, AD .
JOURNAL OF THE GEOLOGICAL SOCIETY, 1984, 141 (JUL) :609-620
[7]  
GIBBS AD, 1983, J STRUCT GEOL, V5, P152
[8]   GEOMETRIC ANALYSIS OF FOLD DEVELOPMENT IN OVERTHRUST TERRANES [J].
JAMISON, WR .
JOURNAL OF STRUCTURAL GEOLOGY, 1987, 9 (02) :207-219
[9]   Geometric analysis of hybrid fault-propagation detachment folds [J].
Marrett, R ;
Bentham, PA .
JOURNAL OF STRUCTURAL GEOLOGY, 1997, 19 (3-4) :243-248
[10]   Multibend fault-bend folding [J].
Medwedeff, DA ;
Suppe, J .
JOURNAL OF STRUCTURAL GEOLOGY, 1997, 19 (3-4) :279-292