| 构造平衡分析及其对前陆褶皱冲断带构造极性的制约:以浙西北地区为例 |
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| 引用本文： | 肖文交,李继亮,孙枢,陈海泓.构造平衡分析及其对前陆褶皱冲断带构造极性的制约:以浙西北地区为例[J].地质科学,2000,35(3):257-266. |
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| 作者姓名： | 肖文交 李继亮 孙枢 陈海泓 |
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| 作者单位： | 中国科学院地质研究所岩石圈构造演化开放研究实验室, 北京, 100029 |
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| 基金项目： | 国家自然科学基金! (项目编号 :4 94 90 0 11和 4 96 72 14 8) |
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| 摘 要： | 应用多级平衡恢复原则,对浙西北地区褶皱-冲断构造样式及其组合进行缩短量计算与分析,同时,对前陆褶皱冲断带的变形缩短量和前陆盆地的缩短量及其二者关系进行了探讨,表明后者包容于前者之中.平衡缩短量与构造样式空间展布关系的研究表明前陆褶皱冲断带蕴含了递进变形的复杂过程,记录了造山作用及其挤压变形从初始→发展→顶峰→尾声的连续过程.综合分析表明缩短量自南东向北西呈递减趋势,即向前陆方向缩短量减少,与应变状态向前陆方向减弱是协调一致的.构造平衡及其综合分析是浙西北前陆褶皱冲断带向北西的构造极性的主要制约因素之一.
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| 关 键 词： | 浙西北 构造平衡分析 缩短量 多级平衡恢复 |
| 收稿时间： | 1998-07-02 |
| 修稿时间： | 1998年7月2日 |
BALANCED STRUCTURAL INTERPRETATION AND ITS CONSTRAINTS ON TECTONIC VERGENCE OF FOLD AND THRUST BELTS:A CASE STUDY FROM NW ZHEJIANG, CHINA |
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| Xiao Wenjiao,Li Jiliang,Sun Shu,Chen Haihong.BALANCED STRUCTURAL INTERPRETATION AND ITS CONSTRAINTS ON TECTONIC VERGENCE OF FOLD AND THRUST BELTS:A CASE STUDY FROM NW ZHEJIANG, CHINA[J].Chinese Journal of Geology,2000,35(3):257-266. |
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| Authors: | Xiao Wenjiao Li Jiliang Sun Shu Chen Haihong |
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| Institution: | Institute of Geology, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | Balanced structural interpretation on fold and thrust belts has been considered to be one of the powerful tools in analysing orogenic belts and their foreland fold and thrust belts, but its tectonic significance for tectonic vergence has not been investigated systematically. By means of multiple restoration, the paper deals with shortening of multi-duplexes, duplexes and thrust imbrication, as well as that of foreland basins in NW Zhejiang. The relationship between shortening and spatial distribution of the structural styles in NW Zhejiang foreland fold-thrust belt reveals complexity in folding-thrusting process in the study area, which records a continuous change from initial stage to development and top level, then to the end in the orogenesis and its compressional process. By calculating the shortening and other synthetic analysing, the authors have investigated that the tectonic shortening decreases from southeast to northwest. Together with the spatial-temporal distribution of the structural styles in NW Zhejiang foreland fold and thrust belt, the authors conclude that the tectonic shortening decreasing is compatible to the deformational decreasing of NW Zhejiang foreland fold and thrust belt. Balanced structural interpretation on fold and thrust belts provides significant constraints on the tectonic vergence together with other tectonic analysis, which demonstrates that the NW Zhejiang foreland folding-thrusting is probably due to a significant orogenesis that happened in NW Zhejiang during the early Mesozoic time. |
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| Keywords: | Balanced structural interpretation NW Zhejiang foreland fold and thrust belt Shortening Multiple restoration |
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