| 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 |
| |
| 引用本文： | 王长岭, 姚庆春, 龙明. 1980: 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. 地震学报, 2(1): 65-73. |
| |
| 作者姓名： | 王长岭 姚庆春 龙明 |
| |
| 作者单位： | 兰州地震研究所 |
| |
| 摘 要： | 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.
|
ON THE ABNORMAL CHARACTERISTICS OF RADON CONTENTS IN THE SPRING WATERS NORTH OF THE EPICENTRAL AREA OF THE SUNGPAN-PINWU EARTHQUAKE BEFORE ITS OCCURRENCE AND THEIR CAUSE |
| |
| WANG CHANG-LING, YAO QING-CHUN, LONG MINGcom sh advan. 1980: ON THE ABNORMAL CHARACTERISTICS OF RADON CONTENTS IN THE SPRING WATERS NORTH OF THE EPICENTRAL AREA OF THE SUNGPAN-PINWU EARTHQUAKE BEFORE ITS OCCURRENCE AND THEIR CAUSE. Acta Seismologica Sinica, 2(1): 65-73. |
| |
| Authors: | WANG CHANG-LING YAO QING-CHUN LONG MINGcom sh advan |
| |
| Affiliation: | Seismological Institute of Lanzhou |
| |
| Abstract: | In this paper the abnormal characteristics of radon contents in ground waters before the occurrence of the 1976 earthquake (M=7.2) in Sungpan—Pingwu area havebeen analysed. It is pointed out that in the epicentral region—Sungpan—and tothe north of it, within a distance of about 360 km radon contents in spring waters indicate a tendency of long-term continuous increase superimposed on which are short term variations, lasting about five years. A preliminary explanation of the phenomena is attempted. It is considered that the slow accumulation of tectonic strain in the epicentral area and its surroundings causes the increase of radon contents in spring waters within a broad area and for a long time. Radon in groundwater may be greatly increased when microfractures in the rock-bodies occur. Besides, the supply of spring water may be greatly accelerated by the enhanced vertical differential movement between crustal blocks causing short term variations of the radon contents. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
|
点击此处可从《地震学报》下载免费的PDF全文 |
