松潘—平武地震前震中以北地区泉点水氡含量异常的特征及其引起原因

• 作 者: 王长岭 姚庆春 龙明
• 机 构: 兰州地震研究所,兰州地震研究所,兰州地震研究所
• 出 处: 地震学报
• 发表日期: 1980年01期
• 关键词: 水氡 松潘 平武 震中 短期异常 引起原因 地壳块体 临震异常 微破裂 震中区

本文叙述了松潘一平武1976年7.2级地震前水氡含量的异常特征.指出震中区松潘及以北地区(360公里范围内)一些泉点水氡出现长达5年左右的趋势性升高异常和短期临震异常,并试图对异常引起的原因作初步讨论.认为震中及其周围地区构造应变的缓慢积累是引起水氡大范围、长时间趋势性升高的原因.岩体微破裂的产生使地下水中氡含量急剧升高.除此之外,地壳块体间加剧的垂直升降运动,使泉水补给来源发生变化,也是引起水氡短期异常的主要原因之一.

This paper describes the anomalous characteristics of water radon before Songpan-Ping-An earthquake of magnitude 7.2 in 1976. It is pointed out that the water radon in some springs in Songpan and the north of the epicenter area (up to 360 km) And short-term temporary earthquakes anomalies, and tries to make a preliminary discussion on the causes of the anomalies, and believes that the slow accumulation of tectonic strain in and around the epicenter is the cause of large-scale radon and long-term trend rising. So that the groundwater radon content increased sharply.In addition, the exacerbated vertical movements between the crust blocks make the source of spring water supply change, which is also one of the main causes of short-term radon anomalies.