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天景山断裂带晚第四纪水平活动强度的分时,分段研究
引用本文:柴炽章,张维歧.天景山断裂带晚第四纪水平活动强度的分时,分段研究[J].中国地震,1997,13(1):35-42.
作者姓名:柴炽章  张维歧
作者单位:宁夏回族自治区地震局
基金项目:国家地震局合同制研究项目
摘    要:在野外实测工作基础上,统计归纳了天景山断裂带上的冲沟左旋错动资料,分析了各类冲沟形成年代,对断裂带晚第四纪以来的水平活动强度分布,分段进行了研究,结果表明,断裂带晚更新以来的总体活动强度不大,但从时间和空间分析,各段活动的差异比较明显,平均滑动速率为0.23~1.62mm/a。晚更新世早,中期,活动中心位于断裂带西段,平均速率为1.40mm/a,晚更新世晚期以来,活动中心东移到中段,平均速率为1.

关 键 词:天景山  断裂带  晚第四纪  滑动速率  活动强度

Discussion of the Level Active Severity in Different Time Intervals and Segments on Late Quaternary along Tianjingshan Fault Zone
Chai Chizhang\ Zhang Weiqi\ Jiao Decheng.Discussion of the Level Active Severity in Different Time Intervals and Segments on Late Quaternary along Tianjingshan Fault Zone[J].Earthquake Research in China,1997,13(1):35-42.
Authors:Chai Chizhang\ Zhang Weiqi\ Jiao Decheng
Abstract:On the basis of counting and classifing the data of the gullies offset along Tianjingshan fault zone got from the field survey and estimating the ages of three scale gullies,the strike slip rates along the fault zone,have been discussed in different time intervals and segments.The results suggest that the active severity along the fault zone in this paper is not strong,but the differences of the different time intervals and segments are clear since Epileistocene,of which the average rates range from 0 23mm/a to 1 62mm/a.The largest average rate is 1 40mm/a which was the location of the west segment of the fault zone in early and middle period of Epileistocene.Since later period of Epileistocene,the active central location of the fault zone has been removed to the middle segment and the range of the average slip rates from 1 30mm/a to 1 63mm/a.
Keywords:Ningxia  Tianjingshan fault zone  Late Quaternary  Slip rate in different time intervals and segments  
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