[1]ZHANG Xiang,FU Hong,LUO Ruijie,et al.Characteristics of the Carbon Isotope of the Dissolved CO2 in Hot Springs in Dali Region,West Yunnan Province[J].Journal of Seismological Research,2021,44(02):185-191.
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Characteristics of the Carbon Isotope of the Dissolved CO2 in Hot Springs in Dali Region,West Yunnan Province
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 02
Page number:
185-191
Column:
Public date:
2021-06-30
- Title:
- Characteristics of the Carbon Isotope of the Dissolved CO2 in Hot Springs in Dali Region,West Yunnan Province
- Keywords:
- hot spring; hydrochemical ions; CO2 and carbon isotope; earthquake; Dali region
- CLC:
- P314.12
- DOI:
- -
- Abstract:
- Finding the source of the dissolved CO2 in hot springs in the study area will facilitate judging and assessing the anomalous information about the dissolved CO2.From October 2016 to July 2017,10 repeated sampling observations were made on hydrochemical ions and δ13CHCO3- 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 HCO3?SO4-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 CO2 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 δ13CHCO3- and HCO3 - in the three hot springs were observed broken,which indicated that the δ13CHCO3- value had a certain correlation with the Yangbi earthquake.
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Last Update:
2021-06-30