Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone

Lü, Yuanyuan; Zheng, Mianping; Zhao, Ping; Xu, RongHua

doi:10.1007/s11430-014-4940-2

Cited by 25 publications

(16 citation statements)

References 59 publications

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“…In some modern (shallow) marine carbonates boron isotope is recorded approximately as 30‰ [10,83], and the B content of marine carbonate (0.29-75.1 ppm) in the Tibetan area is consistent with that of other marine carbonates (3.72-24.0 ppm) [11] and having similar chemical composition as reflected in our study. B in hot springs in the Tibet area (Xiqinqucan, 11 B = 12.3‰ to 12.5‰; Kangbuqucan, 11 B = 13.1‰) comes mainly from marine carbonates [11].…”

Section: The Relationship Betweensupporting

confidence: 88%

“…Furthermore, we will discuss the boron enriched rocks distributed in the region, which are likely to be the sources of the B in the saline springs. According to the geologic background of this area, there are carbonates and some volcanic rocks in the Nangqen Basin, with boron contents of 0.29-75.1 ppm and 378-688 ppm and boron isotopic values of −5.5-20‰ and −16.3 to −10.3‰, respectively [11].…”

Section: Origin Of Boronmentioning

confidence: 99%

“…The average 11 B value of atmospheric precipitation on the Qinghai-Tibetan Plateau has not been reported. Lü et al [11] speculated that the 11 B value of atmospheric precipitation is between −6.0‰ and 6.8‰ on the Qinghai-Tibetan Plateau based on the location of D-Cl in relation to the atmospheric precipitation line of B ( D = 2.6 × 11 B − 133). Our 11 B results are similar to those of a rainwater sample (5.4 ± 1.4‰) in Nepal collected by Rose et al (2000) [76].…”

Section: The Relationship Betweenmentioning

confidence: 99%

“…The green and pink shaded areas are the regions with boron geochemical characteristics of crustal marine carbonate rocks and magmatic rocks, respectively [10]. Data for Tibetan geothermal hot water is from [11].…”

Section: The Relationship Betweenmentioning

confidence: 99%

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Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Han

Hussain

et al. 2018

Geofluids

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The Nangqen Basin is a typical shearing-extensional basin situated in the hinterland of the Tibetan Plateau. It contains abundant saline spring resources and abnormal trace element enrichments. The hydrochemical molar ratios (Na/Cl, B/Cl, and Br/Cl), H-O isotopes, and B isotopes of the saline spring were systematically measured to describe the evolution of brines and the origin of the boron. The sodium chloride coefficient of the water samples in this area is around 1.0 or slightly greater, which is characteristic of leached brines; the highest B/Cl value is 4.25 (greater than that of seawater). The Na/Cl, B/Cl, and Br/Cl values of the springs are clear indicators of a crustal origin. The18 O values of the spring waters range from −12.88‰ to −16.05‰, and the D values range from −100.91‰ to −132.98‰. Meanwhile the B content and B isotopes in the saline springs are in the ranges of 1.00 to 575.56 ppm and +3.55‰ to +29.59‰, respectively. It has been proven that the saline springs in the Nangqen Basin are a type of leached brine, suggesting that the saline springs have a terrestrial origin. The 11 B-B characteristics of the springs are similar to those observed in the Tibetan geothermal area, indicating that these two places have the same B source. Moreover, they have a crustal origin (marine carbonate rocks and volcanic rocks) instead of a deep mantle source.

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Section: The Relationship Betweensupporting

confidence: 88%

Section: Origin Of Boronmentioning

confidence: 99%

Section: The Relationship Betweenmentioning

confidence: 99%

Section: The Relationship Betweenmentioning

confidence: 99%

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Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Han

Hussain

et al. 2018

Geofluids

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“…drothermal origin for the boron present in lake deposits (Zheng et al, 1983;Wu et al, 1984;Zhang et al, 1999) based on the dense distribution of geothermal activities and springs in the lakes along activated graben systems (Zheng et al, 1989;Lü et al, 2013). Others interpretations have considered that the high boron concentration of geothermal water could contribute significantly to boron deposits in the nearby internally drained lakes, as suggested by the constant supply of boron from this source into the lakes and the consequent evaporation (Zheng et al, 1983;Wu et al, 1984;Zhang et al, 1999).…”

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confidence: 99%

Origin of boron in the Damxung Co Salt Lake (central Tibet): Evidence from boron geochemistry and isotopes

et al. 2013

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The origin of boron in boron-rich salt lakes in the Tibetan Plateau has long been the subject of debate. The Damzung Co Salt Lake in central Tibet has high boron concentrations (B = 276-313 mg/L) and is an ideal site for investigation. The aim of this study is to analyze the boron geochemistry and isotope composition of surface brine, source water, country rock, and Quaternary deposits (carbonate clay, stromatolite, and travertine) in the lake, to understand the unusual boron enrichment of the salt lakes in Tibet. Concentrations of boron in stream water samples from the basin are low (B = 0.172-2.08 mg/L), with the exception of one sample that has an input of geothermal water (B = up to 13.6 mg/L). Their variable boron isotope compositions represent the characteristics of country rock weathering input (δ 11 B = -8.6 to -0.5‰). Hot springs have much higher boron concentrations (B = 3.31-49.4 mg/L) than streams and cold springs (B = 0.434-4.82 mg/ L). Boron isotope data show that the δ 11 B values of streams, hot springs (-9.8 to -8.5‰), and cold springs (-14.5 to -1.2‰) are much higher than those of the salt lake (-18.5 to -17.4‰), except in samples containing Quaternary deposits. This finding, therefore, rules out the possibility that the present boron deposits originate from country rock weathering or hot springs, as historically proposed by Chinese scientists. The slight variability in boron isotopic composition in the present lake indicates only one major boron source. Three samples containing Quaternary deposits have different boron isotopic compositions with -37.2 to -35.3‰ (carbonate clay), -29.5 to -24.9‰ (travertine), and -28.2 to -26.7‰ (stromatolite). The fractionation factor between carbonate clay and the lake are very similar to that between seawater, sediment and carbonate in a similar pH range, compared with stromatolite and travertine. Hence, we conclude that early carbonate clay deposits within the lake basin are the present main source of boron in the Damxung Co Salt Lake.

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Comparative study of B content and δ¹¹B in the enamel of isolated teeth from brothers in the same family

Miao

et al. 2021

Rapid Comm Mass Spectrometry

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RationaleThe quantity of boron (B) and its isotopic ratios in tooth can provide information on dietary habits and oral health of individuals. These metrics are gradually being used in stomatology, environmental science and geochemistry.MethodsThis study measured the B concentration and δ11B in the enamel of isolated teeth from brothers in the same family living in high‐B‐exposure areas at different times using inductively coupled plasma mass spectrometry (ICP‐MS) and multicollector ICP‐MS.ResultsThe results demonstrate that B content in tooth samples of two brothers is related to the time of shedding. The earlier the time of shedding, the lower is the B content in tooth. The B content increased from 20.5 μg/g of the central incisor (6–7 years old) of the younger brother to 50.4 μg/g of the second molar (10–12 years old). And B content for the elder brother increased from 28.7 to 58.3 μg/g at the same positions. In the same family, the diet and environmental input of B is basically similar, and the B exposure is basically the same every year. The annual growth rate of B for the younger brother in this experiment is about 4.98 μg/g per year and that for the elder brother is about 4.93 μg/g per year. The δ11B of shed teeth at different times from the same person is basically similar, but different from person to person. The δ11B of shed teeth from the elder brother varies from 15.5‰ to 17.9‰ and from the younger brother varies from 5.2‰ to 6.7‰. The δ11B is quite different for the brothers in the same family who had the same food and environmental intake of B.ConclusionsThe experimental data confirmed the relationship between the information of B (B content and δ11B) in shed teeth and B exposure. They provided an experimental basis using modern human teeth to apply B‐isotope paleo‐environmental significance.

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Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone

Cited by 25 publications

References 59 publications

Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Origin of boron in the Damxung Co Salt Lake (central Tibet): Evidence from boron geochemistry and isotopes

Comparative study of B content and δ¹¹B in the enamel of isolated teeth from brothers in the same family

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Geochemical processes and origin of boron isotopes in geothermal water in the Yunnan-Tibet geothermal zone

Cited by 25 publications

References 59 publications

Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Origin of Boron and Brine Evolution in Saline Springs in the Nangqen Basin, Southern Tibetan Plateau

Origin of boron in the Damxung Co Salt Lake (central Tibet): Evidence from boron geochemistry and isotopes

Comparative study of B content and δ11B in the enamel of isolated teeth from brothers in the same family

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Comparative study of B content and δ¹¹B in the enamel of isolated teeth from brothers in the same family