骨节状石香肠构造应变计初探

• 基础地质·矿床·盆地 • 上一篇下一篇

骨节状石香肠构造应变计初探

许海萍¹,曾佐勋^1，2,程明¹,李泉³

1.中国地质大学地球科学学院，湖北武汉 430074；2.华中构造力学研究中心，湖北武汉 430074;3.中国科学院地质与地球物理研究所,北京 100029

收稿日期:2004-11-14 修回日期:1900-01-01 出版日期:2005-09-26 发布日期:2005-09-26
通讯作者: 许海萍

Primary Approach to the Strain Gauge in Bone-shape Boudins

XU Hai-ping¹,ZENG Zuo-xun^1,2,CHENG Ming¹,LI Quan³

1.Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China；2.Huazhong Tectonomechanical Research Center, Wuhan 430074, China;3.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China

Received:2004-11-14 Revised:1900-01-01 Online:2005-09-26 Published:2005-09-26
Contact: XU Hai-ping

摘要/Abstract

摘要： 考虑两期纯剪切变形成因的骨节状石香肠。假设骨节缝处香肠层的厚度近似等于香肠层的原始厚度，再根据等面积法原理恢复骨节状石香肠层的原始长度，求得石香肠层的拉伸有限应变，并采用物理模拟方法对骨节状石香肠等面积法进行了检验，误差范围分别为3.23%，2.84%，3.94%和6.82%。将该种方法应用于湖北铁山含骨节状石香肠岩石的有限应变测量，得到石香肠层的伸长有限应变值为33.80%~48.22%。再利用矩形断裂石香肠对骨节状石香肠应变测量结果进行检验，取得比较一致的结果。并将两期构造变形的岩石有限应变进行了分离。

关键词: 骨节状石香肠, 应变测量, 等面积法, 湖北铁山

Abstract: The authors have taken the boneshaped boudins of two different stages into account. With the assumption that thickness of joints of the ‘bone’ is approximately the same as the original thickness of the layers of the boudins,the original length of the boudins has been reconstructed with the equalarea method to measure their finite strain. Meanwhile, this equalarea method is demonstrated by physical modeling, showing that the errors are 3.23%, 2.84%, 3.94% and 6.82%, respectively. This new strain gauge is successfully applied in the finite strain determination of rocks embedded boneshaped boudins and developed in Tieshan, Hubei, indicating the extension finite strain of the layers ranges from 33.80% to 48.22%. This result is relatively consistent to the other method applied in the measurement of the boudins’ finite strain. Furthermore, the authors have also successfully segregated the finite strain in two structural deformation periods.

Key words: boneshape boudins, strain determination, equalarea method, Tieshan, Hubei

中图分类号:

P542.2

许海萍,曾佐勋,程明,李泉. 骨节状石香肠构造应变计初探[J]. J4, 2005, 35(05): 570-575.

XU Hai-ping,ZENG Zuo-xun,CHENG Ming,LI Quan. Primary Approach to the Strain Gauge in Bone-shape Boudins[J]. J4, 2005, 35(05): 570-575.

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