| 陕西勉略蛇绿构造混杂结合带组成及演化 |
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| 引用本文： | 杨永成,陈家义,李荣社,霍向光.陕西勉略蛇绿构造混杂结合带组成及演化[J].陕西地质,1996(2). |
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| 作者姓名： | 杨永成 陈家义 李荣社 霍向光 |
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| 基金项目： | 国家自然科学基金!49290100 |
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| 摘 要： | 勉略蛇绿构造混杂结合带是晚古生代以来裂解扩张、在裂谷基础上发育的有限洋盆，属古特提斯海域北部陆缘分支，于早中生代俯冲消亡，印支期碰撞拼合遗留的缝合带。其兼收南北陆缘不同时期的变形基质及古特提斯洋演化过程不同构造坏境增生拼贴构造残块，与基底变质岩块混染间列，经早期剥离—滑脱、主期剪切—逆冲、晚期隆升走滑，组成强带、弱域间互网结状蛇绿构造混杂结合带。
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| 关 键 词： | 有限洋盆 汇聚对接 蛇绿构造混杂 勉略带 陕西 |
COMPOSITION AND EVOLUTION OF THE CHAOTIC JUNCTURE OF OPHIOLITE STRUCTURE IN MIANXIAN-LUEYANG AREA, SHAANXI |
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| Abstract: | The chaotic juncture zone of ophiolite structure in Mianxian-Lueyang area is a residualsuture belt formed by collision and matching in the late of the Indo-Chinese epoch. It splittedoff and spreaded in the late Paleozoic era and developed into a limited ocean basin on the basis of rift, belonging to one terrigenous branch of the northern Paleo-Tethys which underthrusted and consumed in the early Mesozoic era.It gathered the deformed residuals from south and north land-source areas in differentperiods and the structural remnants from different structural environments during the evolution of the Paleo-Tethys. Then it was set in array with the metamorphosed basement complex. Through stripping and decollement in the early stage, shearing and thrusting in themajor stage and, uplifting and strike-slipping in the late stage, it developed into the chaoticjuncture zone of ophiolite structure with dictyoid structure that was alternated with intensivebelts and weak belts. |
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| Keywords: | Limited Ocean Basin Junction Structural Ophiolite Complex Mianxian Lueyang Shaanxi |
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