| 湖南邵阳—郴州北西向断裂左旋走滑暨水口山—香花岭南北向构造成因 |
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| 引用本文： | 柏道远,黄建中,王先辉,马铁球,张晓阳,陈必河.湖南邵阳—郴州北西向断裂左旋走滑暨水口山—香花岭南北向构造成因[J].中国地质,2006,33(1):56-63. |
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| 作者姓名： | 柏道远 黄建中 王先辉 马铁球 张晓阳 陈必河 |
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| 作者单位： | 湖南省地质调查院,湖南,湘潭,411100 |
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| 基金项目： | 中国地质调查局地质大调查项目(200213000035)资助。 |
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| 摘 要： | 湖南大义山断裂属邵阳—郴州NW向断裂的南东段,该断裂南、北两侧发育水口山—香花岭南北向构造带。根据构造变形特征并结合区域构造背景和构造演化分析,确定大义山断裂中新生代至少经历了3次构造活动,从早至晚依次为印支期左旋走滑、燕山期右旋走滑和喜山期(?)左旋走滑。对SN向构造与区域NNE向构造的时代与相互作用关系进行了深入分析,并提出SN向构造成因新认识:由于大义山NW向断裂和香花岭—阳明山NW向断裂在印支运动中产生基底左旋走滑,走滑所派生的近EW向挤压应力场以及走滑所产生的牵引作用,使区域NNE向构造线产生逆时针旋转而形成SN向构造。进一步分析认为,印支期可能为湘东主要NW向断裂在中生代活动最强烈的时期,多条NW向断裂的左旋走滑,可能是雪峰山弧形构造和祁阳“山”字型构造的形成机制之一。
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| 关 键 词： | 邵阳—郴州NW向断裂 水口山—香花岭SN向构造 成因 印支期 左旋走滑 湖南 |
| 文章编号： | 1000-3657（2006）01-0056-08 |
| 收稿时间： | 2005-06-15 |
| 修稿时间： | 2005-06-152005-08-28 |
Sinistral strike-slip motion of the NW-trending Shaoyang-Chenzhou fault and genesis of the N-S-trending Shuikoushan-Xianghualing tectonic zone in Hunan |
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| BAI Dao-yuan,HUANG Jian-zhong,WANG Xian-hui,MA Tie-qiu,ZHANG Xiao-yang,CHEN Bi-he.Sinistral strike-slip motion of the NW-trending Shaoyang-Chenzhou fault and genesis of the N-S-trending Shuikoushan-Xianghualing tectonic zone in Hunan[J].Chinese Geology,2006,33(1):56-63. |
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| Authors: | BAI Dao-yuan HUANG Jian-zhong WANG Xian-hui MA Tie-qiu ZHANG Xiao-yang CHEN Bi-he |
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| Institution: | Hunan Institute of Geology Survey, Xiangtan 411100, Hunan, China |
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| Abstract: | The Dayishan fault, flaked on the north and south by the N-S-trending Shuikoushan-Xianghualing tectonic zone, belongs to the southeastern segment of the NW-trending Shaoyang-Chenzhou fault. On the basis of the characteristics of tectonic deformation, combined with the regional tectonic setting and evolution, the authors consider that the Dayishan fault experienced at least three tectonic movements in the Meso-Cenozoic, which are from early to late times the Indosinian sinistral strike-slip movement, Yanshanian dextral strike-slip movement and Himalayan (?) sinistral strike-slip movement. After an intensive analysis of the ages of the N-S-trending structure and NNE-trending regional structure and their interaction, the authors propose the following new idea of the genesis of the N-S-trending structure:as the basement sinistral strike-slip movements of the NW-trending Dayishan fault and Xianghualing-Yangmingshan fault occurred in the Indosinian movement, the E-W compressional stress field derived by the strike-slip motion and sinistral drag produced by the strike-slip motion led the regional NNE-directed lineament to rotate counterclockwise, thus forming the N-S-trending structure. Further analysis suggests that the Indosinian was probably a period of the strongest movement of the main NW-trending faults in eastern Hunan in the Mesozoic, and that sinistral strike-slip motions of several NW-trending faults in the Indosinian are probably one of the formation mechanisms of the Xuefengshan arc structure and the Qiyang "epsilon"-type structure. |
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| Keywords: | NW-trending Shaoyang-Chenzhou fault N-S-trending Shuikoushan-Xianghualing tectonic zone genesis Indosinian sinistral strike-slip motion Hunan |
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