| 江南造山带北缘鄣公山地区新元古代地层构造变形特征及其动力学机制 |
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| 引用本文： | 张彦杰 廖圣兵,周效华,王存智 蒋,仁 朱意萍.江南造山带北缘鄣公山地区新元古代地层构造变形特征及其动力学机制[J].中国地质,2010,37(4):978-994. |
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| 作者姓名： | 张彦杰 廖圣兵 周效华 王存智 蒋 仁 朱意萍 |
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| 作者单位： | 中国地质调查局南京地质调查中心,江苏,南京,210016 |
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| 基金项目： | 中国地质调查局"安徽1:5万平里、江潭、瑶里、虹关幅区调"项目 |
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| 摘 要： | 鄣公山地区位处皖赣交界地带,区内广泛分布一套浅变质的陆缘细碎屑岩为主含少量火山物质的复理石建造体,大量高精度同位素测年数据显示,该浅变质地层形成于820～840Ma新元古代。经系统野外调查,在该地层中首次解析出5期褶皱变形,其中F1以原始层理(S0)为形变面形成的紧闭同斜、平卧等形态的露头尺度级片内无根褶皱;F2以早期构造面理(S1∥S0)为形变面的轴向近东西向开阔斜歪及同斜褶皱;F3属与大规模逆冲推覆构造相关的紧闭同斜或斜歪褶皱;F4为与燕山期花岗质岩浆热隆升有关的轴面北倾的透入性不对称紧闭下滑褶皱群;F5为分布于区域脆性平移走滑断裂带附近的倾竖褶皱,上述褶皱分别对应不同的构造变形旋回。本文重点阐述褶皱变形的几何学、叠加样式、变形序次、运动学特征,并对变形机制及大陆动力学等进行分析。
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| 关 键 词： | 江南造山带北缘 新元古代浅变质地层 构造变形 大陆动力学 |
Structural deformation features and dynamic mechanism of Neoproterozoic strata in Zhanggongshan area, northern margin of the Jiangnan Orogen |
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| ZHANG Yan-jie,LIAO Sheng-bing,ZHOU Xiao-hu,WANG Cun-zhi,JIANG Ren,ZHU Yi-ping.Structural deformation features and dynamic mechanism of Neoproterozoic strata in Zhanggongshan area, northern margin of the Jiangnan Orogen[J].Chinese Geology,2010,37(4):978-994. |
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| Authors: | ZHANG Yan-jie LIAO Sheng-bing ZHOU Xiao-hu WANG Cun-zhi JIANG Ren ZHU Yi-ping |
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| Institution: | ZHANG Yan-jie,LIAO Sheng-bing,ZHOU Xiao-hua,WANG Cun-zhi,JIANG Ren,ZHU Yi-ping(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China) |
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| Abstract: | Zhanggongshan area is located in the junction zone between Anhui Province and Jiangxi Province.The flysch formation,consisting mainly of continental margin epimetamorphic fine clastic rocks and subordinately of volcanic rocks,is widely distributed in the area.A mass of high precise isotopic dating shows that the epimetamorphic strata might have been formed in Neoproterozoic between 820 Ma and 840 Ma.On the basis of a systematic field investigation,5 stages of fold deformation were recognized through the ana... |
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| Keywords: | northern margin of Jiangnan Orogen Neoproterozoic epimetamorphic stratastructural deformation geocontinental dynamics |
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