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隐伏断裂不同深度CO_2异常特征研究 被引量:3

STUDY ON CHARACTERISTICS OF CO_2 ANOMALIES IN DIFFERENT DEPTHS IN BURIED FAULTS
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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.
出处 《华北地震科学》 北大核心 1994年第3期36-42,共7页 North China Earthquake Sciences
基金 地震科学联合基金
关键词 隐伏断裂 地震 二氧化碳异常 buried fault,fault position,CO_2 anomaly in different depth,mechanism of anmmaly
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