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Title:: Analysis on Measurements Result of Soil Gas Radon across Tianjin Fault

Author(s):: REN Feng; SHAO Yongxin; YAO Xinqiang; (Earthquake Administration of Tianjin Municipality, Tianjin 300201, China)

摘要:: 根据分别布设在天津北断裂和南断裂上23条断层气测量剖面的实测结果,得到了两条断裂的具体位置。探测结果表明,天津北断裂在原有位置上延伸到了静海县唐官屯附近,而天津南断裂在炒米店—木厂测线向北方向的延伸中存在两个方向,需进一步的工作来判断; 从23条土壤氡测量结果分析,异常形态不一致,同时异常也不一定出现在断裂的正上方。使用土壤氡异常的最高值、平均值以及H值对断裂的活动性分段特征进行了综合分析,认为天津北断裂和天津南断裂的活动性分段特征不明显。

Abstract:: Basing on the real measuring results of gas radon at 23 measuring fault gas profiles on Tianjian South Fault and Tianjian North Fault, we obtained the location of two faults. The exploration results also show that the Tianjian North Fault extends to the vicinity of Tangguantun Village in Jinghai County along its original location, but the Tianjian South Fault has been separated in two directions to extend to north in Chaomidian-Muchang profile, and more exploration work should be done for determining the extending position. We analyzed 23 soil radon measurement results and found that the abnormal patterns of soil radon are inconsistent, and the anomaly is not necessarily appearing above the fault. Using the highest value of oil radon anomaly and the average value of anomaly value and H value, we analyzed synthetically the segment characteristic of the activity of Tianjin Fault and obtained that the segment characteristic of the activity of Tianjian South Fault and Tianjian North Fault were not obvious.