| 利用遥感、重力多源信息研究郯-庐断裂带苏-鲁段构造特征 |
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| 引用本文： | 姜文亮,张景发,陈丁,路晓翠,张鹏,李丽梅.利用遥感、重力多源信息研究郯-庐断裂带苏-鲁段构造特征[J].地球学报,2011,32(2):143-153. |
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| 作者姓名： | 姜文亮 张景发 陈丁 路晓翠 张鹏 李丽梅 |
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| 作者单位： | 中国地震局地壳应力研究所;中国地震局地壳应力研究所;山东科技大学;山东科技大学;江苏省地震局;江苏省地震局 |
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| 基金项目： | 中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(编号: ZDJ2007-1、ZDJ2010-11); 徐州市新城区、开发区活断层探测与地震危险性评价项目 |
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| 摘 要： | 本文利用遥感与重力多源信息对郯庐断裂带苏鲁段构造特征进行了研究.应用构造地貌学方法分析了断裂带晚第四纪构造活动及地貌特征;基于Parker界面反演法,利用变密度模型计算了莫霍面深度;随后采用小波多尺度分析方法对局部重力场进行分离,进而分析研究了苏鲁段地壳密度非均匀性及深部地壳结构.沿苏鲁段断裂带发育的水系错断、断层陡坎...
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| 关 键 词： | 郯庐断裂带苏鲁段 构造地貌学 变密度模型 小波多尺度分析 深部构造特征 |
Tectonic Characteristics of Su-Lu Segment of the Tan-Lu Fault Zone Derived from RS and Gravity Multi-source Information |
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| JIANG Wen-liang,ZHANG Jing-f,CHEN Ding,LU Xiao-cui,ZHANG Peng and LI Li-mei.Tectonic Characteristics of Su-Lu Segment of the Tan-Lu Fault Zone Derived from RS and Gravity Multi-source Information[J].Acta Geoscientia Sinica,2011,32(2):143-153. |
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| Authors: | JIANG Wen-liang ZHANG Jing-f CHEN Ding LU Xiao-cui ZHANG Peng and LI Li-mei |
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| Institution: | Institute of Crustal Dynamics, China Earthquake Administration (CEA);Institute of Crustal Dynamics, China Earthquake Administration (CEA);Technique and Science University of Shandong;Technique and Science University of Shandong;Jiangsu seismological bureaui;Jiangsu seismological bureaui |
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| Abstract: | Tectonic characteristics of Su-Lu segment of the Tan-Lu fault zone were studied in this paper. The method of tectonic geomorphology was used to study tectonic activity and geomorphological features of Su-Lu segment in late Quaternary. Moho depths were inversed using the variable density model. Meanwhile, wavelet multi-scale analytical method was applied to separating gravity fields, and the approximate depth of the field source was calculated by using the power spectrum analytical method. Then inhomogeneous features of crust density along Su-Lu segment were analyzed, and deep tectonic characteristics were studied. Geomorphological features, such as offset streams, fault scarps and linear tectonics, are developed along Su-Lu segment. These phenomena indicate that the Tan-Lu fault zone experienced strong right-lateral strike-slip movement in Late Quaternary. According to the Bouguer gravity field features, Moho depths undulate greatly, and Su-Lu segment cuts through the lithosphere. The uplift of the Moho occurs obviously beneath Linshu and Sihong areas, and the upwelling of high density materials of the upper mantle and asthenosphere occurs along the fault. On the west side of the fault, Moho depths reach 35 km. Su-Lu segment intersects other NW-striking faults. Geological and geophysical characteristics are clear. The density structure displays inhomogenous features laterally along the fault. The Bouguer gravity anomalies produced by the upper crust are correlated with the surface geology and topographic features. |
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| Keywords: | Su-Lu segment of Tan-Lu fault zone tectonic geomorphology variable density model wavelet multi-scale analysis deep structure |
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