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Bromine content and Br/Cl molar ratio of halite in a core from Laos: implications for origin and environmental changes
Sun, SR (Sun, Shurui)1,3; Li, MH (Li, Minghui)1,2,4; Yan, MD (Yan, Maodu)2,5; Fang, XM (Fang, Xiaomin)2,3,5; Zhang, GX (Zhang, Gengxin)6; Liu, XM (Liu, Xiaoming)2; Zhang, ZJ (Zhang, Zengjie)7
Source PublicationCARBONATES AND EVAPORITES
2019
Volume34Issue:3Pages:1107-1115
DOI10.1007/s13146-019-00508-0
Abstract

Bromine (Br) is one of the trace elements in halite. Br content and the Br/chlorine (Cl) molar ratio can be used to reveal dry climates, the degree of evaporation, and/or brine concentration. The Br content of basal halite is more useful than that the Br content of halite from later stages when being used to distinguishing marine from nonmarine origins. Evaporite deposits on the Khorat Plateau (KP) have been a primary source of evaporites in southeastern Asia. The origin (i.e., marine, nonmarine, or a combination of the two) of these deposits is still disputed. In this study, we used the Br concentration of basal halite and the Br/Cl molar ratio to explore the origin of these deposits and the environmental changes that took place in the Late Cretaceous. We analyzed a total of 330 halite samples from borehole ZK2893 for cations (K+, Ca2+, Na+, and Mg2+) and anions (Br-, Cl-, and SO42-). The Br content ranged from 24.04 to 277.87 ppm, and the Br/Cl molar ratio ranged from 0.02 to 0.27 ppm. The low Br content (24.04 ppm) and Br x 10(3)/Cl molar ratio (0.02) of the basal halite suggested that no marine water was in the basin when the halite precipitation began. The temporal variations in the Br content and the Br x 10(3)/Cl molar ratio of halite implied that: (1) the climate in this area during the Late Cretaceous was dry, with two dry stages occurring from 92 to 85 Ma and from 80 to 72 Ma; and (2) the drying trend increased from 92 to 85 Ma and from 80 to 72 Ma, with two extremely dry events occurring during the periods 89-85 Ma and 76-73 Ma.

Subject AreaGeosciences
WOS IDWOS:000483699800044
Language英语
Indexed BySCI
KeywordSakhon Nakhon Basin Khorat Plateau Potash Deposits Seawater Chemistry Marine Evaporites Thailand Deformation Evolution Isotopes
WOS Research AreaGeology
WOS SubjectGeology
Cooperation Status国内
ISSN0891-2556
Department大陆碰撞与高原隆升重点实验室
URL查看原文
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9176
Collection图书馆
Corresponding AuthorLi, MH (Li, Minghui)
Affiliation1.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Minerals, Qingdao 266590, Shandong, Peoples R China;
5.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China;
6.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers LAEB, Beijing 100101, Peoples R China;
7.Chinese Acad Geol Sci, Inst Mineral Deposit, Beijing 100037, Peoples R China.
Recommended Citation
GB/T 7714
Sun, SR ,Li, MH ,Yan, MD ,et al. Bromine content and Br/Cl molar ratio of halite in a core from Laos: implications for origin and environmental changes[J]. CARBONATES AND EVAPORITES,2019,34(3):1107-1115.
APA Sun, SR .,Li, MH .,Yan, MD .,Fang, XM .,Zhang, GX .,...&Zhang, ZJ .(2019).Bromine content and Br/Cl molar ratio of halite in a core from Laos: implications for origin and environmental changes.CARBONATES AND EVAPORITES,34(3),1107-1115.
MLA Sun, SR ,et al."Bromine content and Br/Cl molar ratio of halite in a core from Laos: implications for origin and environmental changes".CARBONATES AND EVAPORITES 34.3(2019):1107-1115.
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