地震地磁观测与研究2023，Vol.44Issue(6)：62-69,8.DOI:10.3969/j.issn.1003-3246.2023.06.010
2022年5月13日腾冲ML3.8地震前腾冲地区流体地球化学与地震活动性分析
Analysis of fluid geochemistry and seismic activity in Tengchong area before the Tengchong ML 3.8 earthquake on May 13,2022
摘要
Abstract
Before the Tengchong ML 3.8 earthquake on May 13,2022,starting in March,the frequency of earthquakes in the western Yunnan region increased,and the deformation surface expansion data in the Tengchong area of Yunnan showed significant compression changes,along with simultaneously anomalies such as synchronous changes in static water level and a high value in water radon.Based on the anomalous changes in the Tengchong area,fluid geochemical sampling research was conducted.Dieshuihe cold spring(<25℃),Shiqiang hot spring(45℃-55℃),and Dagunguo boiling spring(>55℃)within the epicenter distance of 28-48 km were selected.Multielement comprehensive analysis methods were used,such as the B/K and K/Li cross plot,Cl-Li-B,and B-F-Cl ternary plot,to study fluid anomalous changes.It was found that the K/Li ratio of the three spring points significantly increased before the earthquake,and B showed high values in hot springs and boiling springs,while Sr also showed high value changes in cold and hot springs.According to comprehensive analysis,based on the volcanic geology and hydrothermal conditions in the Tengchong area,there are elements with strong fluid-related escape,high water solubility,and easy migration before earthquakes,which have research value for identifying seismic geophysical anomalies and help improve the research and application of geochemistry in earthquake prediction.关键词
云南腾冲/流体观测/异常与地震关系/地球化学Key words
Tengchong/Yunnan/fluid observation/relationship between anomalies and earthquakes/geochemistry引用本文复制引用
杨黎,番绍辉,郭晋廷,杨云存,熊佳伟,张天宇,曾宁,马志刚..2022年5月13日腾冲ML3.8地震前腾冲地区流体地球化学与地震活动性分析[J].地震地磁观测与研究,2023,44(6):62-69,8.基金项目
云南省青年地震科学基金:云南腾冲流体痕量元素与地震活动相关性研究(项目编号:2022K12) （项目编号:2022K12）
