实践中发展的最大有效力矩准则

郑亚东; 张进江; 王涛

实践中发展的最大有效力矩准则

1.
教育部造山带与地壳演化重点实验室, 北京大学地球与空间科学学院, 北京 100871
2.
中国地质科学院地质研究所, 北京 100037

基金项目:

国家自然科学基金项目 90714006

国家自然科学基金项目 40872133

详细信息

作者简介:
郑亚东(1936-), 男, 北京大学教授, 构造地质学专业。E-mail:ydzheng@pku.edu.cn

中图分类号: P578.2, P588.3
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- 文章访问数: 141
- HTML全文浏览量: 79
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2009-05-19
- 刊出日期: 2009-09-28

THE MAXIMUM-EFFECTIVE-MOMENT CRITERION DEVELOPING IN PRACTICE

1.
The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China
2.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

摘要

摘要: 最大有效力矩准则发表以来, 不断得到新的野外观察和实验结果的验证, 正在得到国内外同行的支持。岩石的变形行为取决于自身力学性质、构造层次(包括温度、压力、流体压力等因素)和应变速率。浅构造层次中平面菱网状构造和剖面共轭膝褶带, 钝角面对缩短方向, 受最大有效力矩准则控制, 是对慢应变速率的构造响应。证明应变速率对变形行为的控制程度不亚于构造层次。韧、脆性构造的共存意味着构造演化过程为快、慢应变速率的交替。
- 最大有效力矩准则 /
- 应变速率 /
- 膝褶带 /
- 菱网状构造
Abstract: Since the Maximum-Effective-Moment Criterion was published, it has been obtaining evidence in nature and the laboratory and supports from geologists home and abroad. Behavior of rock during deformation depends on mechanical property itself, structure levels (including such factors as temperature, pressure, fluid) and strain rate. The lozenge features and conjugate kink zones with obtuse angles in the contractional direction at shallow levels are consistent with the criterion and suggested as deformation at low strain rates and conform that the strain rate plays a more important role than the structure level in deformation. Coexistence of brittle and ductile features implies a tectonic evolution with alternation of high and low strain rates.
- Maximum-Effective-Moment Criterion /
- strain rates /
- kink belt /
- lozenge features

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图 1 最大有效力矩准则

(阴影区囊括全部天然和实验共轭变形带的半夹角)
M_eff—有效力矩; σ₁-σ₃—差应力, 其大小等于屈服强度; L—单位长度; α—给定平面与σ₁轴间夹角

Figure 1. The maximum effective moment criterion (MEMC)

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图 2 不同尺度的共轭剪切带

(a)单晶石英沿光轴压缩实验形成的微观共轭剪切带^[13]; (b)云母鱼中的共轭伸展褶劈理; (c)英格兰波尔比钾盐矿支撑柱中的共轭屈服带^[14]; (d)加拿大地盾中的共轭韧性剪切带^[15]

Figure 2. Conjugate shear zones on different scales

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图 3 墨西哥湾深水区原解释的高角逆断层(上)和现解释的膝褶带(下) ^[18]

Figure 3. Old (upper)and new (lower)explanations for seismic sections in Northwestern deep-water Gulf of Mexico

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图 4 柴达木盆地油泉子构造新近系粉砂质石膏片岩

Figure 4. Silty gypsum schist on the northern flank of the Oil-Spring Dome in Qaidam Basin

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图 5 内蒙古赤峰篓子店断层泥中S/C组构与C′和共轭C′面理

Figure 5. S/C fabrics and conjugate extensional cr enulation cleavages in fault-gouge

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图 6 中亚与青藏区主要共轭走滑断层间的夹角

(藏中断层走向玫瑰图(右下图)据左下图^[26]资料编制)

Figure 6. Angles between major strike-slip faults in mid-Asia and Qinghai-Tibet

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