| 郯(城)—庐(江)断裂带赤山段晚白垩世晚期以来构造应力场 |
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| 引用本文： | 姚大全,汤有标.郯(城)—庐(江)断裂带赤山段晚白垩世晚期以来构造应力场[J].华南地震,1990(4). |
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| 作者姓名： | 姚大全 汤有标 |
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| 作者单位： | 安徽省地震局
(姚大全)，安徽省地震局(汤有标) |
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| 摘 要： | 本文依据对晚白垩世晚期和晚更新世地层中发育的共轭剪节理分析,结合野外地质调查、断层泥显微构造分析以及地应力测量和区域构造应力场演化特征分析,反演了郯一庐断裂带赤山段及近侧地区晚白垩世晚期以来的构造应力场,得到:Ⅰ期,σ_1为近南北向,作用时间自古新世后至晚更新世之前;Ⅱ期,σ_2为北东东—南西西至近东西向,作用时间始于晚更新世后,其影响可能延续至今。两期应力均以水平方式作用为主,且分别与宏、微观构造形迹相对应。
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| 关 键 词： | 郯—庐断裂赤山段 构造应力场 综合分析 |
THE COMPREHENSIVE ANALYSIS OF THE TECTONIC STRESS FIELD SINCE LATE CRETACEOUS IN THE CHI-SHAN SEGMENT OF THE TANGCHENG-LOUJIANG FAULT ZONE |
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| Yao Daquan Tang Youbiao.THE COMPREHENSIVE ANALYSIS OF THE TECTONIC STRESS FIELD SINCE LATE CRETACEOUS IN THE CHI-SHAN SEGMENT OF THE TANGCHENG-LOUJIANG FAULT ZONE[J].South China Journal of Seismology,1990(4). |
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| Authors: | Yao Daquan Tang Youbiao |
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| Institution: | Seimological Bureau of Anhui Province |
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| Abstract: | Depending on the analysis of conjugate shear joints in the upper Cretaceous and upper Pleistocene, combining with the geological survey of field and analysing microstructures of gouge, focal-mechanism solution, ground stress measurement, the evolution of regional tectonic stress field and the tectonic stress field since the late Cretaceous in the Chi-Shan segment of the Tangcheng-loujiang fault zone, Some results are gained showing in thg following.
I . Q. N-S to NNE-SSW (action direction), E-Q, (action time). I. Q: NEE-SWW to E-W (action direction), Q3-Present(action time), All of these lie nearly horizontally^ They are always in accordance! with trances of the macro-micfostructures |
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| Keywords: | The Chi-Shan segment of the Tang-Lu fault zone tectonic Stress field Comprehensive analysis |
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