三峡坝区非对称共轭低缓角度剪破裂系

索书田; 侯光久; 石林; 韦必则; 余永志

Volume 25 Issue 3

May 2000

Turn off MathJax

Article Contents

Article Navigation > Earth Science > 2000 > 25(3): 283-289

SUO Shutian, HOU Guangjiu, SHI Lin, WEI Bize, YU Yongzhi, 2000. ASYMMETRIC AND CONJUGATE LOW-ANGLE SHEAR FRACTURE SYSTEM IN THREE GORGES DAM REGION, CHINA. Earth Science, 25(3): 283-289.

Citation:

SUO Shutian, HOU Guangjiu, SHI Lin, WEI Bize, YU Yongzhi, 2000. ASYMMETRIC AND CONJUGATE LOW-ANGLE SHEAR FRACTURE SYSTEM IN THREE GORGES DAM REGION, CHINA. Earth Science, 25(3): 283-289.

SUO Shutian, HOU Guangjiu, SHI Lin, WEI Bize, YU Yongzhi, 2000. ASYMMETRIC AND CONJUGATE LOW-ANGLE SHEAR FRACTURE SYSTEM IN THREE GORGES DAM REGION, CHINA. Earth Science, 25(3): 283-289.

Citation:

SUO Shutian, HOU Guangjiu, SHI Lin, WEI Bize, YU Yongzhi, 2000. ASYMMETRIC AND CONJUGATE LOW-ANGLE SHEAR FRACTURE SYSTEM IN THREE GORGES DAM REGION, CHINA. Earth Science, 25(3): 283-289.

PDF( 583 KB)

ASYMMETRIC AND CONJUGATE LOW-ANGLE SHEAR FRACTURE SYSTEM IN THREE GORGES DAM REGION, CHINA

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Comprehensive Exploration and Surveying Bureau, Changjiang Water Conservancy Commission, Wuhan 430010, China

Received Date: 1999-10-26
Publish Date: 2000-05-25

Abstract

Abstract

An asymmetric and conjugate low-angle shear fracture system is identified in the multi-phase complex fracture systems within the rock mass of the Three Gorges dam region, with the help of the rock frictional rheology theory and the structural analytical method. The geometry and kinetic indicators show that this conjugate shear fracture system affected by the sliding-resistance stability in the deep and shallow layers of the dam occurred at a relatively early age, and then was sheared and modified by the fracture systems in the later period, constrained by the heterogeneity of the rock mass. In this sense, this conjugate shear fracture system is a product of the asymmetrical coaxial deformation restrained by the high fluid pressure.
- low-angle shear fracture,
- asymmetric coaxial deformation,
- fluid pressure,
- Three Gorges dam region

FullText(HTML)

References(14)

References

[1]	陈德基, 薛果夫, 徐福兴, 等. 三峡工程地质研究[M]. 武汉: 湖北科学技术出版社, 1997.
[2]	Ranalli G. Rheology of the lithosphere in space and time [A]. In: Burg J P, Ford M, eds. Orogeny through time [C]. London: Geological Society Special Publication, 1997. 19~37.
[3]	Platt J P, Vissers R L M. Extensional structures in anisotropic rocks[J]. J Struct Geol, 1980, 2(4): 397~410. doi: 10.1016/0191-8141(80)90002-4
[4]	Sibson R H. Structural permeability of fluid-driven fault-fracture meshes[J]. J Struct Geol, 1996, 18(8): 1031~1042. doi: 10.1016/0191-8141(96)00032-6
[5]	Hill D P. A model for earthquake swarms[J]. J Geophys Res, 1977, 82: 347~352.
[6]	Marshak S, Mitra G. Basic methods of structural geology [M]. Englewood Cliffs: Prentice Hall, 1988.
[7]	Sibson R H. Earthquake rupturing as a mineralizing agent in hydrothermal systems[J]. Geology, 1987, 15(8): 404~701.
[8]	Byerlee J D. Friction of rocks[J]. Pure and Applied Geophysics, 1978, 116: 615~626. doi: 10.1007/BF00876528
[9]	Brace W, Kohlstedt. Limits on lithospheric stress imposed by laboratory experiment[J]. J Geophys Res, 1980, 85: 6248~6252. doi: 10.1029/JB085iB11p06248
[10]	Cobbold P R, Cosgrove J W, Summers J M. The development of internal structuresin deformed anisotropic rocks [J]. Tectonophysics, 1971, 276: 23~53.
[11]	冯定犹, 李志昌, 张自超. 黄陵花岗岩类岩基南部岩体侵入时代和同位素特征[J]. 湖北地质, 1991, (2): 1~12. https://www.cnki.com.cn/Article/CJFDTOTAL-HBDK199102000.htm
[12]	Sibson R H. Frictional constraints on thrust, wrench and normal faults[J]. Nature Phys Sci, 1974, 249: 542~543. doi: 10.1038/249542a0
[13]	Lin A. S-C cataclasite in granitic rock[J]. Tectonophysics, 1999, 304: 257~273. doi: 10.1016/S0040-1951(99)00026-8
[14]	Kohlstedt D L, Evans B, Mackwell S J. Strength of the lithosphere: constraints imposed by laboratory experiments[J]. J Geophy Res, 1995, 100: 17587~17602. doi: 10.1029/95JB01460