隐伏断裂不同深度CO_2异常特征研究  

STUDY ON CHARACTERISTICS OF CO_2 ANOMALIES IN DIFFERENT DEPTHS IN BURIED FAULTS

作　　者：林元武[1] 翟盛华[1] 范树全[1] 孔令昌[1] 

机构地区：[1]国家地震局地质研究所

出　　处：《华北地震科学》1994年第3期36-42,共7页North China Earthquake Sciences

基　　金：地震科学联合基金

摘　　要：本文对比研究了华北北部隐伏活动的唐山断裂和夏垫断裂以及隐伏不活动的香河－皇庄断裂上０．５ｍ和２．０ｍ深处的ＣＯ２异常特征，并初步讨论了ＣＯ２异常机理及不同深度ＣＯ２异常特征在判断隐伏断裂位置及其活动性中的应用。０．５ｍ深处的ＣＯ２在隐伏活动断裂和隐伏不活动断裂上均有异常；而２．０ｍ深处ＣＯ２在隐伏活动断裂上异常显著，在隐伏不活动断裂上则没有异常。２．０ｍ深处ＣＯ２异常范围比０．５ｍ深处ＣＯ２异常范围小得多。认为０．５ｍ深处ＣＯ２主要来源于生物作用，而２．０ｍ深处ＣＯ２则主要来源于碳酸盐岩的破释气。In this paper, foe Authors study the characteristics of CO2 anomalies in 0. 5m and 2. 0m depth in Tangshan and Xiadian buried active faults and Xianhe-Huangzhuang buried inact ive fault in the northern part of North China, and preliminarily discuss the mechanism of CO, anomaly and applications of CO2 anomalous features in different depths in determining locations and activities of the buried faults.CO, contents in 0. 5m depth show distinct anomalies both in the buried active and inactive faults, however, CO2 contents in 2. 0m depth show notable anomalies in the buried active faults but don't show anomaly in the buried inactive fault. The width of CO2 anomaly estension in 2. 0m depth is much more narrower than that in 0. 5m depth. It is suggested that CO2 in 0. 5m depth is mainly originated from biogenic agency while CO2 in 2. 0m depth is primarily derived from degassing in the processes of carbonte rock ruptures caused by fault movement.

关 键 词：隐伏断裂 地震 二氧化碳异常 

分 类 号：P315.7[天文地球—地震学]