王运生, 徐鸿彪, 魏鹏, 马宏宇, 王福海, 雷清雄, 贺建先. 2015: 龙门山断裂带震后地球化学特征. 工程地质学报, 23(s1): 24-30. DOI: 10.13544/j.cnki.jeg.2015.s1.004
    引用本文: 王运生, 徐鸿彪, 魏鹏, 马宏宇, 王福海, 雷清雄, 贺建先. 2015: 龙门山断裂带震后地球化学特征. 工程地质学报, 23(s1): 24-30. DOI: 10.13544/j.cnki.jeg.2015.s1.004
    WANG Yunsheng, XU Hongbiao, WEI Peng, MA Hongyu, WANG Fuhai, LEI Qingxiong, HE Jianxian. 2015: GEOCHEMICAL FEATURES OF LONGMENSHAN FRACTURES AFTER WENCHUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 24-30. DOI: 10.13544/j.cnki.jeg.2015.s1.004
    Citation: WANG Yunsheng, XU Hongbiao, WEI Peng, MA Hongyu, WANG Fuhai, LEI Qingxiong, HE Jianxian. 2015: GEOCHEMICAL FEATURES OF LONGMENSHAN FRACTURES AFTER WENCHUAN EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 24-30. DOI: 10.13544/j.cnki.jeg.2015.s1.004

    龙门山断裂带震后地球化学特征

    GEOCHEMICAL FEATURES OF LONGMENSHAN FRACTURES AFTER WENCHUAN EARTHQUAKE

    • 摘要: 龙门山断裂带震后出现较为明显的地球化学异常, 震后通过现场测氡, 对各主断裂的活动性进行分析与观测。结果显示:前山断裂氡气浓度最大值与背景值比值为3.5~7.1, 其中有地表破裂的地段比值较大, 达7~7.1, 一般地段比值仅为3.5~5.6, 在青川甲烷异常及锰异常, 中央断裂氡气浓度最大值与背景值比值为7.05~8.75, 后山断裂氡气浓度最大值与背景值比值为7.3。这表明此次地震中央断裂活动性最强, 前山断裂与后山断裂活动性次之, 即此次地震的发震断裂为中央断裂, 前、后山断裂受之影响产生联动, 同时沿通济白水河大桥分布的北西向断层裂也有明显的联动效应, 浓度最大值与背景值比值为6.05。

       

      Abstract: Based on the field measurement of the main fault of Longmenshan structral belt after the earthquake, the Radon concentration measurement's data is processed and analyzed, and three main faults' activities are compared. The result shows that the ratio of Radon viscosity's maximum and background value along the front fault is around 3.5~7.1, in which the ratio in the segment with surface rupture is 7.0~7.1, while the one without surface rupture ranges from 3.5 to 5.6; the ratio of central fracture and back range fracture are around 7.05~8.75 and 7.3 respectively. That means the central range fracture has the stronger activity than the others, which suggests that the seismic-fault of the earthquake is the central one and the other faults' movement were triggered by it. At the same time, the fault along the Tongji-Baishuihe bridge was stimulated by the central fracture, the ratio is 6.05.

       

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