Helium and argon isotopes in rocks, minerals, and related ground waters: A case study in northern Switzerland

Tolstikhin, Igor; Lehmann, B.; Loosli, H.H.; Gautschi, A.

doi:10.1016/0016-7037(96)00036-1

Cited by 90 publications

(51 citation statements)

References 31 publications

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“…As a result, rivers, lakes, oceans, and most shallow groundwaters with residence times of the order of 10 3 years or less generally have 40 Ar/ 36 Ar ratios not much different from that of dissolved atmospheric Ar, even where K is present, although high-precision measurements in some such environments may be useful in the future. Deeper, older groundwaters may contain substantial radiogenic 40 Ar components released from aquifer minerals, providing useful information about groundwater movement and water-rock interaction [37,38] (see below).…”

Section: Surface Water and Shallow Groundwatermentioning

confidence: 99%

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Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Böhlke

2014

Pure and Applied Chemistry

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Abstract:The isotopic composition and atomic weight of argon (Ar) are variable in terrestrial materials. Those variations are a source of uncertainty in the assignment of standard properties for Ar, but they provide useful information in many areas of science. Variations in the stable isotopic composition and atomic weight of Ar are caused by several different processes, including (1) isotope production from other elements by radioactive decay (radiogenic isotopes) or other nuclear transformations (e.g., nucleogenic isotopes), and (2) Ar) at various levels of precision are widely used for studies in geochronology, water-rock interaction, atmospheric evolution, and other fields.

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Section: Surface Water and Shallow Groundwatermentioning

confidence: 99%

“…Selected other nuclear reactions yielding stable Ar isotopes 35 Cl (n, γ) 36 Cl (β-) 36 Ar 35 Cl (a, p) 38 Ar 37 Cl (n, γ) 38 Cl (β-) 38 Ar Atomic masses are given in unified atomic mass units, u, with uncertainties in the last 2 digits in parentheses [3].…”

Section: Introductionmentioning

confidence: 99%

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Böhlke

2014

Pure and Applied Chemistry

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“…3 He/ 4 He is a useful indicator of the origin of He [35,[57][58][59]. In the following, 3 He/ 4 He of He produced in both the Koetoi and Wakkanai formations was calculated according to Tolstikhin et al, [60].…”

Section: 23mentioning

confidence: 99%

“…In subsurface, 3 He is mainly produced by n-reaction of 6 Li that produces 3 H followed by -decay of 3 H that produces 3 He and the production rate of 3 He from the rock is expressed by [60] 3…”

Section: 23mentioning

confidence: 99%

An Evaluation of the Long-Term Stagnancy of Porewater in the Neogene Sedimentary Rocks in Northern Japan

et al. 2018

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A groundwater dating for very old porewater using 36 Cl and 4 He was applied to the Koetoi and Wakkanai formations distributed in the northernmost part in Japan. Measured 36 Cl/Cl in the Koetoi Formation was 2.6 ± 2.0 × 10 −15 and that in the Wakkanai Formation was 8.1 ± 2.5 × 10 −15 . These values are similar to 36 Cl/Cl in situ secular equilibrium calculated from chemical compositions of core suggesting that Cl − ions and porewater have remained in the formations for much longer than half-life of 36 Cl . He concentration in porewater ranged from 1.1 × 10 −6 to 2.6 × 10 −5 (cc STP g w −1 ) and it is much higher than water saturated with air indicating that both formations contain very old porewater. However, the possibility of mixing of young water was indicated because He concentration was lower than that calculated by multiplication of in situ He production and time after the uplift. This possibility was also supported by Cl − , D, and 18 O data. After combining information on 36 Cl/Cl, 4 He, and D and 18 O, it was inferred that the porewater in the deep part of the Wakkanai Formation might have been stagnant since the uplift. The porewater in the Koetoi Formation and the shallow part of the Wakkanai Formation were found to be affected by young surface water.

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“…So, the variation of 3 He/ 4 He ratios in minerals or rocks is dependent on the content of Li, Th and U [44]. According to the calculation of Tolstikhin et al [45], the accumulative nucleogenic or radiogenic 3 He/ 4 He isotopic ratios of lithium-bearing chlorite (Li content is 160 ppm) and biotite (Li content is 320 ppm) in Paleozoic gneiss dated at 320 Ma are 0.09 Ra and 0.13 Ra, approximately the same as the accepted upper level for the crust, 0.1 Ra [46], and far lower than the expected mantle value (6-9 Ra) [47][48][49][50]. However, the samples in this study do not have lithium abundance data.…”

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

Zhai

Sun

et al. 2012

Chin. Sci. Bull.

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With the development of noble gas isotopic geochemistry, a tracing system for noble gas isotopes has gradually been applied to studies of ore fluid origins . As a result, in many metal deposits, mantle-derived He was discovered in ore fluids [1][2][3][4][5][7][8][9][10]12,[15][16][17][18][19][20][21][22][23][25][26][27][28][29]. Mantle He in crustal rocks is intimately related to crust-mantle interaction, and the formation and evolution of mantle magma. Mantle magma not only provides ore fluid for metallogenesis, but also provides heat for the hydrothermal circulation that results in mineralization. Southeastern China is an important area of tungsten and tin metallogenesis, both regionally and globally, with many large, supergiant deposits, such as the Xihuangshan, Dajishan, and Piaotang tungsten deposits in Jiangxi province, the Jubankeng and Yaoling-Meiziwo

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Helium and argon isotopes in rocks, minerals, and related ground waters: A case study in northern Switzerland

Cited by 90 publications

References 31 publications

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

An Evaluation of the Long-Term Stagnancy of Porewater in the Neogene Sedimentary Rocks in Northern Japan

He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

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