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Title:: Analysis of Tectonic Geochemical Observation Results of Yishu Fault Zone

Author(s):: GENG Jie; FU Jundong; KONG Xiangyang; MIAO Jie; GE Fugang; (Shandong Earthquake Agency,Jinan 250014,Shandong,China)

Keywords:: geochemical item; distribution of measured values; active fault; Anqiu-Juxian fault

摘要:: 为了监测郯庐断裂带跨活动断裂地球化学组分变化特征,利用在沂沭断裂带上的安丘—莒县断裂勘选出的5条地球化学观测测线剖面观测资料,分析了不同测线的土壤气体浓度(Rn,CO₂和H₂)和测值分布特征。结果表明:断裂活动性质、活动强度、构造组合和裂隙分布对跨活动断层的地球化学测项测值分布具有控制作用,地球化学测项测值分布与活动断裂两侧地层结构、类型和密实程度密切相关,跨活动断层不同地球化学测项分布存在一定的相关性。

Abstract:: In order to monitor the variation characteristics of geochemical components across active faults along the Tanlu fault zone,based on the selected five geochemical observation profiles of the Anqiu-Juxian fault in cross-Yishu fault zones,we processed and analyzed the distribution characteristics of soil gas concentration(Rn,CO₂,H₂)and measured values along different lines of the Anqiu-Juxian fault. The preliminary analysis results show that the nature of fault activity,activity intensity,tectonic assemblage and fracture distribution control the distribution of geochemical survey items across active fault,the distribution of geochemical survey items is closely related to the stratigraphic structure,type and compactness on both sides of fault activity. There is a certain correlation between the distribution of geochemical values across active faults.