INITIATION OF SALT DIAPIRS WITH FRICTIONAL OVERBURDENS - NUMERICAL EXPERIMENTS

被引：95
作者：
POLIAKOV, ANB [1 ]
PODLADCHIKOV, Y [1 ]
TALBOT, C [1 ]
机构：
[1] UPPSALA UNIV, INST EARTH SCI, HANS RAMBERG TECTON LAB, S-75236 UPPSALA, SWEDEN
来源：
TECTONOPHYSICS | 1993年 / 228卷 / 3-4期
关键词：
D O I：
10.1016/0040-1951(93)90341-G
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
We have studied the initiation of salt diapirs with frictional overburdens under lateral compression and extension. The overburden is assumed to be elasto-plastic with Mohr-Coulomb yield criterion and non-associated flow rule. Plastic flow localizes into narrow shear bands which may represent faults. The geometry and the evolution of these shear zones are simulated for various theological parameters. The dilational and frictional properties of frictional overburdens are found to be important controls on the types of shear zones formed in lateral compression and extension. The friction and dilation angles influence the angle of shear and the width, dip, spacing and development history of conjugate zones of shear-plus-dilation (fault zones) that define wedges and grabens.
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页码：199 / 210
页数：12
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