西安地裂缝H_2异常与地裂缝成因探讨  

ANOMALIES IN H2 FROM THE GROUND FISSURES IN XIAN AND DISCUSSIONS ON GENESIS OF THE GROUND FISSURES

作　　者：林元武[1] 翟盛华[1] 范树全[1] 

机构地区：[1]国家地震局地质研究所

出　　处：《中国地质灾害与防治学报》1994年第2期32-36,共5页The Chinese Journal of Geological Hazard and Control

基　　金：地震科学联合基金

摘　　要：本文研究了西安地裂缝的土壤Ｈ２异常特征，并讨论了Ｈ２异常机理。西安地裂缝上Ｈ２异常显著，异常范围小，异常峰值与主地裂缝的位置关系密切。认为Ｈ２不是来源于生物作用，而是来源于结晶基底岩石破裂或水岩反应。地裂缝上的Ｈ２异常是西安地区隐伏断裂活动的产物，它与过量开采地下水没有成因联系，认为西安地裂缝主要是构造运动造成的。The characteristics of anomalies of H2 in soils of the ground fissures in Xian are studied, and the mechanism of anomalies in H2 is discussed in this paper. H2 show notableanomalies with narrow anomaly extensions on the ground fissures, and the anomaly peaks are closely related with the locations of the ground fissures. It is indicated that H2 are not originated from biogenic agency but from ruptures of crystalline basement rocks or waterrock reactions. The anomalies in H2 of the ground fissures are results of the hidden fault movements in Xian area but haven't causal relation to excessive groundwater withdrawal.It is suggested that the ground fissures are mainly caused by the tectonic movements.

关 键 词：西安地裂缝 H2异常 隐伏活动 断裂 构造成因 

分 类 号：P694[天文地球—地质学]