正断型隐伏生长断层上断点埋深的研究——以银川隐伏断层钻孔联合剖面为例

英文篇名：Investigation about Buried Depth of Up-breakpoint on the Normal Buried Growth Fault——Taking Bore Hole Composite Profile of Buride Fault in Yinchuan as an Example
中文刊名：中国地震
英文刊名：Earthquake Research in China
作者：张学辉 ; 王银 ; 杜鹏 ; 雷启云 ; 谢晓峰
英文作者：Zhang Xuehui~ 1 ; 2) Wang Yin~ 2) Du Peng~ 2) Lei Qiyun~ 2) Xie Xiaofeng~ 2) 1) Lanzhou Institute of Seismology ; Lanzhou 730000 ; China2) Earthquake Administration of Ningxia Hui Autonomous Region ; Yinchuan 750001 ; China
中文关键词：活动断层探测 ; 隐伏生长断层 ; 生长指数 ; 断层上断点
英文关键词：Exploration of active fault Buried growth fault Growth index Fault up-breakpoint
出版日期：2006-12-30
机构：中国地震局兰州地震研究所,宁夏回族自治区地震局,宁夏回族自治区地震局,宁夏回族自治区地震局,宁夏回族自治区地震局兰州市东岗西路410号730000,宁夏回族自治区地震局,银川市750001,银川市750001,银川市750001,银川市750001,银川市750001
年：2006
期：04
出版单位：中国地震

摘要

断层上断点埋深是隐伏活动断层地震危险性评价中的一个重要参数。在隐伏断层活动性研究中,钻孔探测是重要的探测手段之一(徐锡伟,2002),但由于标志地层发育的局限和钻探分辨能力的局限,识别的断层上断点埋深往往会大于实际埋深。为了减小这种误差,本文以银川隐伏生长断层探测钻孔联合地质剖面资料为基础,提出了一种生长指数法,用以推算隐伏生长断层的上断点埋深。得出的3个钻探场点的断层“理论上断点”埋深分别为:9.09m(新渠稍场点),7.86m(满春场点)和7.25m(板桥场点),小于钻探可识别的上断点埋深。经验证,这应更接近于断层的实际断错情况。
Buried depth of fault up-breakpoint is a important parameter in earthquake risk estimate of buried active fault. In study of the buried fault activity, drilling is one of the important exploration means, but as a result of localization of the marker horizon developed and drilling own resolving power, the depth of up-breakpoint which drilling can identify always deeper than the actual depth of fault up-breakpoint. In order to minish the error, based on the drill exploration composite geological section data in Yinchuan buried growth fault, put forward a sort of growth index means, to reckon depth of up-breakpoint of buried growth fault. From the account we gained the “academic up-breakpoint” depth of the 3 proving grounds in Yinchuan buried fault, the result is as follows: The academic up-breakpoint depth of Xingqushao proving grounds is 9.09m, in Manchun proving grounds, the academic up-breakpoint depth is 7.86m, in Banqiao proving grounds, the academic up-breakpoint depth is 7.25m. All of the results less than depth of the fault up-breakpoint that drilling can identify. By validate, much more close to actual broken complexion of the fault.

引文

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