基于ETM+遥感数据的闽南地区断裂活动性评价探讨
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摘要
以闽南地区为研究区域,以ETM+遥感影像数据为基础,通过广泛收集、分析研究区地质背景资料,分析区域内断层活动情况,进而提取研究区线性构造信息,结合地震地质资料对闽南地区主要断裂的分布情况及活动性做系统的分析研究。同时对闽南地区的新构造活动及构造应力场,线性构造和水系的分形分维,地震活动及其危险性和地热异常等主要影响因子做初步探讨。在确定影响断裂活动性的主要因素后,对研究区进行初步分区和定量化评价。最终判定研究区可圈定为:相对较不活动区、相对较活动区、相对活动区3个活动性级别。其中相对活动区面积占整个研究区3/5以上;相对较不活动区面积较小,造成相对活动的关键性因素是地震、活动断裂。
Taking Minnan area as a research area,based on ETM + remote sensing image datas,through collecting and analyzing geological background information,analyzing the activities of the faults,extracting linear structure information,and combining with earthquake geological datas,distribution and activities of main fractures in Minnan region have been analyzed and studied.Genozoic and recent techonic activities,the crustal surface,fractal dimension of linear structures and river system,seismic activities,risks and geothermal abnormity have been studied primarily.Based on active analysis and fuzzy comprehensive evaluation,the active grade of each subzone in Minnan area has been determined.The research area can be finally circled into the relative not activity region,comparative activity region and the activity region.The relative activity region of area is more than three of five of the whole research area.The relative not activity region is smaller.The key factors which caused realive activity are earthquake and active faults.
Taking Minnan area as a research area,based on ETM + remote sensing image datas,through collecting and analyzing geological background information,analyzing the activities of the faults,extracting linear structure information,and combining with earthquake geological datas,distribution and activities of main fractures in Minnan region have been analyzed and studied.Genozoic and recent techonic activities,the crustal surface,fractal dimension of linear structures and river system,seismic activities,risks and geothermal abnormity have been studied primarily.Based on active analysis and fuzzy comprehensive evaluation,the active grade of each subzone in Minnan area has been determined.The research area can be finally circled into the relative not activity region,comparative activity region and the activity region.The relative activity region of area is more than three of five of the whole research area.The relative not activity region is smaller.The key factors which caused realive activity are earthquake and active faults.
引文
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[2]章孝灿,黄智才,赵元洪,等.遥感数字图像处理[M].杭州:浙江大学出版社,1997.
[3]福建省地方志编纂委员会.福建省志—地理志[M].北京:方志出版社,2001.
[4]李兼海,王国平,郑铁藩,等.福建省地层多重划分、对比研究(续)[J].福建地质,1996,(1):20-54.
[5]易顺民,唐辉明.活动断裂的分形结构特征[J].地球科学,1995,(1):58-62.
[6]沈晓华,邹乐君,阳峰.长江河道分形与流域构造特征的关系[J].浙江大学学报,2001,(1):107-111.
[7]朱晓华.中国大陆山系、断层系的分形分维探讨[J].地质力学学报,1999,(2):45-50.
[8]马瑾.滇西北发震构造条件及其与鲜水河断裂带的对比[J].地震地质,1988,(4):35-43.
[9]胡海涛.区域地壳稳定性评价的“安全岛”理论及方法[J].地质力学学报,2001,(2):97-103.
[10]易明初.黄河黑山峡坝址区构造活动特征及区域稳定性简评[M].北京:地震出版社,2003:190-196.
[11]李四光.关于地质构造的三重基本概念[J].科学通报,1953,(4):253-260.
[12]易明初.新构造活动与区域地壳稳定性[M].北京:地震出版社,2003:22-25.
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