| 构造应力场研究的新进展 |
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| 引用本文： | 万天丰.构造应力场研究的新进展[J].地学前缘,1995,2(2):226-235. |
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| 作者姓名： | 万天丰 |
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| 作者单位： | 中国地质大学 |
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| 基金项目： | 地矿部科技司重要基础地质课题基金，国家计委迎接第30届国际地质大会科研项目 |
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| 摘 要： | 本文阐明构造应力（主应力与剪应力）方向的研究方法以及最新研究成果，指出全球各地区在某一时期的应力方向可以是各不相同的，同一地区在不同地质时期内的构造应力方向也是截然不同的，并且应力方向的转变周期也不相等。在概述了应力大小的研究方法之后，作者介绍了构造应力大小研究中的两个新成果：（１）构造应力主要集中在岩石圈内，（２）构造应力从板块边缘向内部具有明显的衰减趋势。至于构造应力积累时间，一般认为是ｎ×１０￣７年的缓慢过程，而应力释放时间则为ｎ×１０￣６年的过程，是一种灾变性、较快的流变过程。构造应力场数学模拟方法已经比较成熟，构造应力的起源问题则为当今构造地质学的前沿性课题之一，对此本文较客观地进行了探讨。
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| 关 键 词： | 构造应力场，应力方向，应力大小，数学模拟，构造应力的起源 |
THE PROGRESS OF RESEARCHES ON TECTONIC STRESS FIELD |
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| Wan Tianfeng.THE PROGRESS OF RESEARCHES ON TECTONIC STRESS FIELD[J].Earth Science Frontiers,1995,2(2):226-235. |
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| Authors: | Wan Tianfeng |
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| Abstract: | The research methods and recent results of the orientations of tectonic stress(princi-pal and shear stress)are proposed,the author has pointed that the orientations of stress in a cer-tain stage over the world are different,that in a certain area with different geological stagesthey also vary distinctively and their exchange periods are unequal.Generalizing the approachesfor studying stress magnitude,the author has come to two conclusions of tectonic stress magni-tude:(1) the tectonic stress is concentrated in lithosphere;(2) the tectonic stress is obviouslyweakening from the boundary of plate to its interior.The accumulation time of the tectonicstress,as a general rule,is a slow process of n×10￣7a,and its release time is a process of n×10￣6a,which is a catastrophic,rapid and rheologic process.The mathematical modelling of the tec-tonic stress is rather mature.The origin of the tectonic stress is one of the frontier problems intectonics,which is discussed rather objectively in this paper. |
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| Keywords: | tectonic stress field stress orientation stress magnitude mathematical mod-elling origin of tectonic stress |
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