从汞异常讨论阳江—从化断裂的活动性及对孕震的影响  

DISCUSSION ON THE ACTIVITY OF YANGJIA-NG-CONGHUA FAULT AND ITS INFLUENCE ON THEDEVELOPMENT OF EARTHQUAKE FROMHg ABNORMALITY

作　　者：李富光[1] 

机构地区：[1]广东省地震局

出　　处：《华南地震》1991年第3期46-51,共6页South China Journal of Seismology

摘　　要：根据区域重砂普查圈定的辰砂分散晕和跨断层剖面壤中气汞测量结果,联系已有地震资料,讨论了阳江——从化断裂带的活动性及汞异常与地震活动的关系。认为:沿断裂带群集的汞异常可以作为活动断裂的判别标志之一;汞沿断裂裂隙向上运移系促使断裂活动的动力因素之一;汞异常段之间的相对低值区或其外侧系地震活动的主要场所。According to the dispersing halo of cinnabar which enclosed during the general survey of regional heavy sand and the measuring result of gas mercury in the soil of trans-fault profile, and based on the available seismic data, the activity of Yangjiang-Conghua fault and the relations between Hg abnormality and seismicity are discussed in this paper. The result shows that Hg abnormality crowded along the fault zone may be taken as one of the signs to determine active faults. One of the factors of fault activity is caused by upward movement of mercury along the fault fissure. The area of relative low value or the outside between the segment of Hg. -abnormality is the major place for seismicity.

关 键 词：活动断裂 应力集中 汞异常 地震前兆 地震活动 孕震 

分 类 号：P315.5[天文地球—地震学] P315.724[天文地球—固体地球物理学]