多元信息在断裂空间展布调查中的应用——以马金-乌镇断裂为例
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摘要
北东走向的马金-乌镇断裂是浙北地区一条重要的断裂,该断裂及周边地区曾有多次地震发生(M≤5),然而由于受第四系覆盖等客观条件所限,关于该断裂的空间展布方向和活动性仍存在着争论。本文以马金-乌镇断裂为例,采用图像增强和融合等处理方法进行遥感信息提取,同时结合野外调查、断裂活动年代样品的采集和测定、航磁数据以及浅层人工地震勘探等多元信息,对马金-乌镇断裂进行了详细的研究和年代鉴定。研究结果表明,遥感技术不仅有效地查明了断裂的空间展布,同时指导了浅层人工地震勘探的测线布置以及推断断裂的活动时代和运动性质,为城市规划和建设提供基础数据和参考依据。
The NW-SE trending Majin-Wuzhen fault(MWF) is a major fault in Hangzhou region,and there are several earthquakes(M ≤5) took place near the fault zone and its suroundings.However,because of the Quaternary and other objective conditions,the distribution and activity of the Majin-Wuzhen fault is still in discussion.In this paper,the definition and precision of the remote sensing images were greatly improved by image enhancements and fusions.At the same time,we collected aeromagnetic anomalies data,shallow artificial seismic exploration data,ERS measured data,field investigation and so on to validate the interpreted results.The results show that the multi-resource information can identify the spatial distribution of the fault,guide the line layout of shallow artificial seismic exploration survey,judge the fault activity characteristics and offer significance to city planning and construction.
The NW-SE trending Majin-Wuzhen fault(MWF) is a major fault in Hangzhou region,and there are several earthquakes(M ≤5) took place near the fault zone and its suroundings.However,because of the Quaternary and other objective conditions,the distribution and activity of the Majin-Wuzhen fault is still in discussion.In this paper,the definition and precision of the remote sensing images were greatly improved by image enhancements and fusions.At the same time,we collected aeromagnetic anomalies data,shallow artificial seismic exploration data,ERS measured data,field investigation and so on to validate the interpreted results.The results show that the multi-resource information can identify the spatial distribution of the fault,guide the line layout of shallow artificial seismic exploration survey,judge the fault activity characteristics and offer significance to city planning and construction.
引文
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[2]丘元禧,夏亮辉.中国东部及邻区中新生代大陆边缘性质的讨论[J].中国区域地质,1994,(12):258-267.
[3]张微,陈汉林,李启敏,等.高分辨遥感在杭州活断层探测中的应用[J].煤田地质与勘探,2007,35(3):10-14.
[4]姚琪,陈汉林,张微,等.弱震区断层泥ESR定年的适应性研究:以杭州地区为例[J].地震学报.2008,30(3):262-270.
[5]姚琪,陈汉林,张微,等.断层泥电子自旋共振测年在杭州城市活动断层探测中的应用[J].-子能科学技术.2008,42(7):658-661.
[6]李起彤.活断层及其工程评价[M].北京:地震出版社,1991,23-46.
[7]叶建青.城市活断层研究与浙江省的城市化建设[J].上海地质,2001,(4):31-33.
[8]张微,姚琪,钱俊锋,等.昌化—普陀断裂构造遥感分析及信息提取[J].应用基础与工程科学学报,2008,16(4):754-763.
[9]Weidong Sun,Wei Zhang.Application of the RemoteSensing Technology in the Line Arrangement of ShallowArtificial Seismic Exploration[J].Computer and Informa-tion Science,2009,2(2):16-19.
[10]YAO Qi,CHEN Hanlin,ZHANG Wei,et al.Adaptabilityof ESR dating of fault gouge in a seismic region:A casestudy of Hangzhou Region,China[J].Acta SeismologicalSinica.2008,21(3):267-275.
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