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Using hydrochemical and stable isotopic (delta H-2, delta O-18, delta B-11, and delta Cl-37) data to understand groundwater evolution in an unconsolidated aquifer system in the southern coastal area of Laizhou Bay, China
He, Zekang1,2,3; Ma, Chuanming1; Zhou, Aiguo1; Qi, Huihui1; Liu, Cunfu1; Cai, Hesheng4; Zhu, Huichao2
2018-03-01
Source PublicationAPPLIED GEOCHEMISTRY
ISSN0883-2927
Volume90Pages:129-141
Corresponding AuthorMa, Chuanming(machuanming@cug.edu.cn)
AbstractThis study illustrates the origin of Quaternary brines and groundwater salinization processes at Laizhou Bay using hydrochemical and delta H-2, delta O-18, delta B-11 and delta Cl-37 data. The characteristics of the major ionic components of these brines demonstrated that brines originated from evaporated seawater. The delta H-2 and delta O-18 values of brines showed that seawater underwent strong evaporation and that these brines underwent mixing with paleo-meteoric water or surface water. The fact that the Cl/Br mass ratios of the Laizhou Bay brines (180-291) are lower than that of halite dissolution brine (>1000) contradicts the hypothesis that these brines were derived from halite dissolution, and the fact that the delta Cl-37 values (0.14%-0.21%) of these brines are more enriched than those derived from seawater evaporation represents positive evidence that evaporated seawater in the lagoon infiltrated through clay layer, during which ion filtration resulted in the positive Cl isotopic compositions of these brines. The higher B isotopic compositions (49.88%-64.42%) and lower B/Cl molar ratios (8.5 x 10(-5) similar to 1.6 x 10(-4)) of these brines are consistent with the brine origin determined based on the analysis of Cl isotopes. As the evaporated water infiltrated the clay layer, the preferential adsorption of B-10 onto clay dominated the B isotopic composition of the brine. Five different mixing processes were calculated using B contents and B isotopic compositions. These calculations illustrated that one shallow saline groundwater (No. 05) was derived from the mixing of fresh groundwater and deep brine, thus indicating that brine intrusion occurred in the northern area of Changyi, which was caused by the over-exploitation of fresh groundwater. While one shallow saline groundwater (No. 10) and one deep saline groundwater (No. 12) in the northern of Xiaying were derived from the mixing of brine and seawater. The delta B-11 values of the two shallow brackish groundwater samples were close to that produced by the desorption of B from marine clay, and their B/Cl molar ratios were relatively higher, which demonstrated that B-desorption dominated the characteristic B hydrochemical compositions of brackish groundwater.
Keyworddelta Cl-37 delta B-11 delta H-2 and delta O-18 Quaternary brines Ion filtration Southern plain of Laizhou Bay
DOI10.1016/j.apgeochem.2018.01.003
WOS KeywordIONIZATION MASS-SPECTROMETRY ; CHLORINE ISOTOPES ; BORON ISOTOPES ; OCEANIC-CRUST ; CL ISOTOPES ; HYDROTHERMAL PROCESSES ; SALINIZED GROUNDWATER ; CLIMATE-CHANGE ; QAIDAM BASIN ; FLUIDS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41572212]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000424849000011
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57013
Collection中国科学院地理科学与资源研究所
Corresponding AuthorMa, Chuanming
Affiliation1.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
4.3 Explorat Inst Geol & Mineral Resources, Yantai 264000, Peoples R China
Recommended Citation
GB/T 7714
He, Zekang,Ma, Chuanming,Zhou, Aiguo,et al. Using hydrochemical and stable isotopic (delta H-2, delta O-18, delta B-11, and delta Cl-37) data to understand groundwater evolution in an unconsolidated aquifer system in the southern coastal area of Laizhou Bay, China[J]. APPLIED GEOCHEMISTRY,2018,90:129-141.
APA He, Zekang.,Ma, Chuanming.,Zhou, Aiguo.,Qi, Huihui.,Liu, Cunfu.,...&Zhu, Huichao.(2018).Using hydrochemical and stable isotopic (delta H-2, delta O-18, delta B-11, and delta Cl-37) data to understand groundwater evolution in an unconsolidated aquifer system in the southern coastal area of Laizhou Bay, China.APPLIED GEOCHEMISTRY,90,129-141.
MLA He, Zekang,et al."Using hydrochemical and stable isotopic (delta H-2, delta O-18, delta B-11, and delta Cl-37) data to understand groundwater evolution in an unconsolidated aquifer system in the southern coastal area of Laizhou Bay, China".APPLIED GEOCHEMISTRY 90(2018):129-141.
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