| 影响地下应力状态的构造作用 |
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| 引用本文： | 刘瑞珣,吕古贤.影响地下应力状态的构造作用[J].地球学报,2002,23(2):103-106. |
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| 作者姓名： | 刘瑞珣 吕古贤 |
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| 作者单位： | 北京大学地质学系，100871;中国地质科学院地质力学研究所，北京100081 |
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| 基金项目： | 国家自然科学基金(49972080)，中国地质科学院地调项目(DKD20001028)资助 |
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| 摘 要： | 成岩成矿的外部条件中压力是很重要的因素。地下岩石所受的压力不仅来自上覆岩石的重力，而且来自构造力和热力及其它力。这些力合成一个三轴不等的应力状态，相当一个以最短轴为半径的球状应力迭加一个差应力。前者影响成岩成矿和变质作用，后者控制岩石变形和组构的变化。通过三维应变应力测量，这两部分力通过计算是可以区分开的，因而这将是建立地下深度测算新方法的一个基础。
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| 关 键 词： | 应力状态 差应力 构造力 岩石变形 |
Tectonic Activities Affecting Ground Stress State |
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| LIU Rui-xun and LV Gu-xian.Tectonic Activities Affecting Ground Stress State[J].Acta Geoscientia Sinica,2002,23(2):103-106. |
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| Authors: | LIU Rui-xun and LV Gu-xian |
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| Institution: | Department of Geology, Peking University, Beijing, 100871;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081 |
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| Abstract: | Underground pressure is an important factor for rock and mineral formation. It is derived not only from the gravity force caused by the overlying rocks but also from tectonic, thermal and other dynamic forces. All these forces construct a stress state with three differential axes. The stress state can be described by a sphere stress having the radius of the minimum axis with the superimposition of a differential stress between the maximum and the minimum axes. The spheric stress affects the rock and mineral formation and metamorphism, and the differential stress controls the deformation and the fabric variation of rocks.The spheric stress induced by tectonics is called an additional tectono-hydrostatic pressure,which is a basic of new method of measurement and calculation of fomation depth of geological actions. |
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| Keywords: | stress state differential stress tectonic force rock and mineral formation |
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