Boron isotope geochemistry of Bangor Co Salt Lake(central Tibet):implications for boron origin and uneven mixing of lake water
作者机构：Qinghai Provincial Key Laboratory of Geology and Environment of Salt LakesQinghai Institute of Salt LakesChinese Academy of Sciences810008 XiningQinghaiChina State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of Sciences710061 Xi’anChina University of the Chinese Academy of Sciences100049 BeijingChina
出 版 物：《Acta Geochimica》 (地球化学学报（英文）)
年 卷 期：2022年第41卷第5期
页 面：731-740页
核心收录：
学科分类：070902[理学-地球化学] 081803[工学-地质工程] 0709[理学-地质学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
基 金：the Shaanxi Provincial Natural Science Foundation for Distinguished Young Scholars(No.2022JC) the 2nd Tibetan Plateau Scientific Expedition and Research(Nos.2019QZKK0805 and 2019QZKK0707) the Innovation Academy for Green Manufacture,Joint Fund Projects(No.IAGM2020C09) Basic Research Program of Qinghai Province(No.2020-ZJ-734)
主 题：Tibet Bangor Co salt lake Boron isotope Origin Fractionation processes
摘 要：Boron is an essential,widely used,micronutrient element and is abundant in salt lakes on the Qinghai-Tibet *** origin and distribution of boron brine deposits on the Qinghai-Tibet Plateau is an important foundation for B resource formation,evolution,and enrichment,which have long been the subject of *** boron isotope system is a sensitive geochemical tracer,making it useful for eff ectively and precisely tracking a wide range of geological processes and *** study investigates the major cations,[B],andδB values of samples(lake brine,river waters,and cold spring water)from the Bangor Co Lake which is a typical salt lake rich in boron in Tibet,*** are magnitude-scale diff erences in[B]among diff erent sample types:river samplescold spring waterbrine lakes.[B]values vary from 0.73 to~1113 mg/*** to[B],theδB values of the samples exhibit magnitude-scale variations as[B],ranging from-7.35‰to+7.66‰.There are also magnitude-scale diff erences inδB among diff erent sample ***δB values of cold spring water are relatively low,and the values range from-1.26‰to-7.75‰.However,the river water samples and saline lakes have higher values,from 0.38‰to 4.62‰,and theδB values of river water samples are basically in the distribution range of those of Bangor Co *** indicates that the sources of boron in Bangor Co Lake are mainly the recharge water with higherδB values and spring water with lowerδB values,and the boron sources and the uneven mixing of lake water are two reasons that account for the large change in theδB value of Bangor Co Lake.
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