摘要
温泉溶解CO_(2)的来源成因研究,有利于判断与甄别研究区温泉溶解CO_(2)异常信息。对2016年10月至2017年7月大理地区3个温泉的水化学常量离子和δ^(13)C_(HCO3-)进行了10次重复取样观测,对3个温泉的水文地球化学及CO_(2)来源进行分析。结果表明:3个温泉均属于HCO_(3)·SO_(4)-Na型水,地下水补给都来自于大气降水,CO_(2)主要来自于深部的地幔成因和变质成因的CO_(2);2017年漾濞M_(S)5.1地震发生前,3个温泉的δ^(13)C_(HCO3-)值与HCO3-正相关关系发生改变,表明温泉δ^(13)C_(HCO3-)值与地震有一定的相关性。
Finding the source of the dissolved CO_(2) in hot springs in the study area will facilitate judging and assessing the anomalous information about the dissolved CO_(2).From October 2016 to July 2017,10 repeated sampling observations were made on hydrochemical ions and δ^(13)C_(HCO3-) in three hot springs: Xiaguan, Eryuan and Midu in Dali region, West Yunnan Province.The results showed that the three hot springs’ water belonged to HCO_(3)·SO_(4)-Na type.The analysis of Hydrogen-oxygen isotope indicated that the groundwater recharge of the three hot springs was derived from atmospheric precipitation.The analysis of carbon isotope showed that the CO_(2) in the three hot springs was mainly derived from the deep mantle and metamorphism.Before the Yangbi 5.1-magnitude earthquake in 2007,which was located within 100 km from these three hot springs, the positive correlation between the background values of δ^(13)C_(HCO3-) and HCO3- in the three hot springs were observed broken, which indicated that the δ^(13)C_(HCO3-) value had a certain correlation with the Yangbi earthquake.
作者
张翔
付虹
罗睿洁
李波
字承柱
ZHANG Xiang;FU Hong;LUO Ruijie;LI Bo;ZI Chengzhu(Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)
出处
《地震研究》
CSCD
北大核心
2021年第2期185-191,共7页
Journal of Seismological Research
基金
国家自然基金(UI602223)
中国地震局监测预报司震情跟踪课题任务(2017010310)联合资助。
