| 俯冲带楔体中逆冲构造的形成及演化：构造物理模拟实验研究 |
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| 引用本文：王宗秀.1995.俯冲带楔体中逆冲构造的形成及演化：构造物理模拟实验研究[J].地球学报,16(2):165-176. |
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| 中文摘要:通过交换不同的边界条件来进行构造物理模拟，重塑及研究岩石圈中各种构造现象发生及发展的过程与机制，并与自然界中存在的构造现象进行对比，是构造物理模拟所具有的独特优越性。实验以俯冲带楔体中及其底部逆冲断层形成过程中的几何学、运动学的研究为主题，以底部摩擦强度（俯冲片与传送带间的摩擦）及插入厚度的变化为边界条件进行的。实验证实了俯冲带中楔体底部及其下部俯冲片中存在的构造底侵作用；底部不同的摩擦强度与不同的插入厚度对楔体前缘、内部及底部逆冲构造的形成演化及其组合形式有如下影响：（１）楔体前缘逆冲断层系之间的间距随底部摩擦强度增强而加大；（２）当底部摩擦强度大时，楔体前缘逆冲叠瓦扇构造表现出一种前导主叠瓦扇（Ｌｅａｄｉｎｇｎｉｍｂｒｉｃａｔｅｆａｎ），反之则显示尾（Ｔｒａｉｌｉｎｇ）叠瓦扇组合特点；（３）插入厚度对楔体内部的反向逆冲构造的形成及演化具明显的影响。 |
| 中文关键词:构造物理模拟 逆冲构造 楔体 |
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| Formation and Evolution of Thrust in the Wedge of Subduction Zone:Experiment Research on Tectonophysics Modeling |
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| Abstract:Tectonophyscis modeling is provided with special advantages,which rebuilding process and mech-anism of different structural phenomenons in the lithosphere and companing with the nature ones.Therescarches on geometries and kinematics of formation precess of wedges and its bottom thrust systemswere take as the main aim of the experiment,the different friction strength and different insetionthickness change were used as boundary conditions.The experiment confirmed underplating in the bot-tom of wedge. Different friction strength and insertion thickness hae the influences on the formation,evolution and consitution of the front edges,the interior and base thrusts of the accretionary wedge asfollows:①the distances among thrust systems of the front edges of the wedge increare by base frictionstrengthenning;②when base friction strengthenning,thrust imbricate fan of the accretionary frontedge appers as lealing imbricate fan,conversely ,as traiding imbricate fan;③insertion thickness has aprefound effect on the formation and evalution of the everse thrust with wedge. |
| keywords:tectonophysic modeling thrust wedge |
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