| 湖南中生代造山过程——华南陆块周缘造山带之影响 |
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| 引用本文： | 梁新权,郭定良.湖南中生代造山过程——华南陆块周缘造山带之影响[J].湖南地质,2003,22(1):15-18. |
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| 作者姓名： | 梁新权 郭定良 |
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| 作者单位： | [1]中国科学院广州地球化学研究所，广东广州510640 [2]湖南省地质研究所，湖南长沙410007 |
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| 基金项目： | 湖南省科技厅2001年重点项目，湖南省院士基金项目资助。 |
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| 摘 要： | 湖南地区中生代造山作用强烈，其演化过程与华南陆块各周缘造山带一样，经历了T3一JI的陆内碰撞造山、J2一KI陆内碰撞后造山及K2后的伸展造山阶段．湘谭一祁东以西的扬子区域，发育一系列NE向展布向NW逆冲的逆冲推覆构造带，而其东部华夏区域则发育热隆伸展构造与走滑盆山构造带．研究表明，湖南地区的造山过程与周缘追山带的形成演化体戚相关．一方面，周缘造山带对湖南地区构成了楔入构造的运动学——动力学边界条件；另一方面，华南周缘古特提斯洋的消减和周缘陆块对华南陆块的会聚、碰撞造山激活了软流层地幔的上涌和东向迁移，这是湖南地区中生代活化和造山过程的主要机制．
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| 关 键 词： | 湖南 中生代 造山过程 华南陆块 造山带 地壳运动 |
MESOZOIC OROGENIC PROCESS IN HUNAN PROVINCE:EFFECTS OF THE OROGENIC BELTS AT THE MARGIN OF THE SOUTH CHINA BLOCK |
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| LIANG Xin-quan,GUO Ding-liang.MESOZOIC OROGENIC PROCESS IN HUNAN PROVINCE:EFFECTS OF THE OROGENIC BELTS AT THE MARGIN OF THE SOUTH CHINA BLOCK[J].Hunan Geology,2003,22(1):15-18. |
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| Authors: | LIANG Xin-quan GUO Ding-liang |
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| Institution: | LIANG Xin-quan1,GUO Ding-liang2 |
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| Abstract: | An intense intracontinental orogenic process had happened in Mesozoic stage in Hunan Province.Like the orogenic belts at the margin of the South China block (i.e. Qiling-Dabie,Songpan-Ganzi,and Honghe-Ailaoshan orogenic belt),it evolved from intracontinental underthrust of late Triassic to early Jurassic, post- intracontinental underthrust of middle Jurassic to early Cretaceous ,and extensional period of late Cretaceous to Eogene. A series of NE-striking,NW-word-thrusting thrusts and nappes were developed in the west area,while thermo-upwelling extension tectonics and strike-slip orogenic belts were developed in the east Xiangtan-Qidong deep foult zone.It indicates that the Mesozoic basin and range structure framework in Hunan Province was related to evolution of the orogenic belts at the margin of the South China block.One side, three kinematics-dynamics restrictive boundary condition of the Hunan indentation tectonics were constituted, on the other hand, the Hunan activated and orogenic process resulted from rejuvenation and migration eastwards of the asthenospheric materials caused by the paleotethyean subduction and followed collision events outside the South China bloock. |
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| Keywords: | The orogenic belts at the margin of the South China block Mesozoic orogenic process Hunan Province |
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