摘要
根据实验结果讨论了 1 92 0年海原 8.5级大震发震断裂的气体构造地球化学作用 .海原活动断裂带上的脱气以地壳脱气作用为主 ,脱气作用产物主要来源于上中地壳 ,脱气作用的强度与断层应力状态运动特点密切相关 .不同元素所反映的脱气深度范围及特征有所不同 ,氡对浅部断层活动及拉张区脱气作用较为灵敏 ,汞、氦能反映较深地壳内的脱气作用 ,氢的异常则与断层的逆冲、推覆作用及断面上岩水作用密切相关 .
The structural aerogeochemistry process along the earthquake generating fault of the Haiyuan (MS8.5 earthquake) in 1920 is discussed based on the exprimental result.The degassing on the Haiyuan active fault is mainly crust degasification,in which the contents are mainly from middle upper crust.The degassing intensity is closely correlated to the fault stress state as well movement characteristics.The different degassed elements reflect different depth and characteristics.Radon reflects shallow depth and tension,mercury and Helium reflect relative deep depth,and hydrogen reflects obduction or nappe or rock water reaction on the fault surface.
出处
《西北地震学报》
CSCD
2000年第4期447-451,464,共6页
Northwestern Seismological Journal
基金
地震科学联合基金资助项目!(95 0 7433)
国家重点室实验室--气体地球化学实验室资助项目!(95 0 1)
中国地震局兰州地震研究所!论
