Accurate and High‐Precision Measurement of Lithium Isotopes in Two Reference Materials by MC‐ICP‐MS

Millot, Romain; Guerrot, Catherine; Vigier, Nathalie

doi:10.1111/j.1751-908x.2004.tb01052.x

Cited by 174 publications

(136 citation statements)

References 23 publications

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“…This mean value is in good agreement with our long-term measurement (δ 7 Li = +31.0‰ ± 0.5, 2σ, n=30, Millot et al, 2004) and with other values reported in the literature (see, for example, Tomascak 2004 for a compilation). For rocks, a total digestion of the sample is necessary before separation of Li from the matrix.…”

Section: Lithium Isotopessupporting

confidence: 80%

“…The value for seawater sampled offshore in the Bouillante bay (δ 7 Li = +29.3‰) is at the lower end of the range of variation observed for oceans worldwide (from +29 to +34‰, Millot et al, 2004). …”

Section: Bouillante Lamentin and Diamant Areasmentioning

confidence: 99%

“…The seawater chosen for the experiments is the reference material IRMM BCR-403 (δ 7 Li = +31.0‰ ± 0.5, Li = 0.18 mg/L, Millot et al, 2004).…”

Section: Experimental Techniques For Seawater/basalt Interactionmentioning

confidence: 99%

“…7 Li/ 6 Li ratios were normalized to the L-SVEC standard solution (NIST SRM 8545, Flesch et al, 1973) following the standard-sample bracketing method (see Millot et al, 2004 for more details). Typical in-run precision on the determination of δ 7 Li is about 0.2‰ (2σ m ).…”

Section: Lithium Isotopesmentioning

confidence: 99%

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Lithium isotopes in island arc geothermal systems: Guadeloupe, Martinique (French West Indies) and experimental approach

Millot

Scaillet

Sanjuan

2010

Geochimica et Cosmochimica Acta

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114

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. Lithium isotopes in island arc geothermal systems: Guadeloupe, Martinique (French West Indies) and experimental approach. Geochimica et Cosmochimica Acta, Elsevier, 2010, 74 (6) AbstractWe report Li isotopic measurements in seawater derived waters discharged from geothermal wells, thermal and submarine springs located in volcanic island arc areas in Guadeloupe (the Bouillante geothermal field) and Martinique (Lamentin plain and the Diamant areas). The lithium isotopic signatures of the geothermal fluids collected from deep reservoirs are homogeneous for a given site.However, the δ 7 Li signatures of each of these reservoirs are significantly different. We provide the first low temperature (25-250°C) experiments of Li isotope exchange during seawater/basalt interaction), which confirm that Li isotopic exchange is strongly temperature dependent, as previously inferred from natural studies. Li isotopic fractionation ranges from +19.4‰ (Δ solution -solid ) at 25°C to +6.7‰ at 250°C.The experiments also evidence the importance of Li isotopic fractionation during formation of Libearing secondary minerals by the uptake of lithium into the alteration minerals. Application of experimental results to the Bouillante area suggests that the geothermal water is in equilibrium at 250-260°C with a deep and large reservoir located in the transition zone possibly at the contact between volcanic flows and basaltic dikes. For the Lamentin and Diamant areas, the geothermal fluid appear to be partially in equilibrium at 90-120°C and 180°C, respectively, with reservoir sedimentary rocks. Our study highlights that lithium isotopic systematics is a powerful tool for the characterization of the origin of geothermal waters as well as the nature of their reservoir rocks.

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Section: Lithium Isotopessupporting

confidence: 80%

Section: Bouillante Lamentin and Diamant Areasmentioning

confidence: 99%

“…The seawater chosen for the experiments is the reference material IRMM BCR-403 (δ 7 Li = +31.0‰ ± 0.5, Li = 0.18 mg/L, Millot et al, 2004).…”

Section: Experimental Techniques For Seawater/basalt Interactionmentioning

confidence: 99%

Section: Lithium Isotopesmentioning

confidence: 99%

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Lithium isotopes in island arc geothermal systems: Guadeloupe, Martinique (French West Indies) and experimental approach

Millot

Scaillet

Sanjuan

2010

Geochimica et Cosmochimica Acta

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114

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“…However, in the context of water/rock 61 interactions, numerous studies (Huh et al, 1998(Huh et al, , 2001Pistiner et al, 2003; Kisakurek et al, 62 2004 Kisakurek et al, 62 , 2005 Pogge von Strandmann et al, 2006;Millot et al, 2007Millot et al, , 2010aMillot et al, , 2010b have 63 clearly shown that isotopic fractionation supports the enrichment of the heavy isotope ( 7 Li) in 64 solution, the light isotope ( 6 Li) being preferentially retained in secondary weathering 65 minerals. Silicate rocks display Li isotope compositions ranging from -2 to +10‰ (Coplen et 66 al., 2002;Teng et al 2004), that of seawater is ~ +31‰ (Millot et al, 2004), river water has 67 intermediate isotopic compositions (+6 to +23‰, Huh et al, 1998), and saline (thermo-68 mineral) water generally has isotopic compositions in the range of 0 to +15‰ 69 Négrel, 2007, Millot et al, 2010b) although Falkner et al (1997) found Li isotopic 70 compositions in the range of +17 to +35‰ in hot spring water from Lake Baikal. 71…”

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confidence: 99%

Lithium isotopes as tracers of groundwater circulation in a peat land

et al. 2010

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8 9Water circulation in the peat bog of a maar depression in the Massif Central (France) was traced with 10 lithium isotopes on water samples collected in the area from springs, surface-and groundwaters, as 11 well as on solid samples taken from peat bogs. 18In the present study, we explain the extremely enriched 7 Li signature of the groundwaters by an -IntroductionA wetland is an area covered at least part-time by usually quite shallow water. Wetlands can 36 be natural or artificial, permanent or temporary, and the water in them can be static or 37 flowing, and fresh, brackish or salty. Wetlands form where water collects in a low-lying area 38 with poor drainage. The water filling a wetland can have many origins: precipitation is a 39 major source of water for many wetlands, but others are maintained by water that periodically 40 overflows from rivers, lakes, etc., whereas a third source of water for wetlands is 41 groundwater. All three sources generally deliver water to wetlands in regular cycles, based on 42 the natural cycle of water through the hydrosphere. It is also worth noting that understanding 43 the hydrology of a wetland is primordial for efficient flood control, paleoclimate analyses, 44 and studying its role in the overall ecology. 45The present study investigates the use of Li and its isotopes as a proxy of ground-to-surface 46 water exchanges in a peatland from a mire-lake complex in the French Massif Central, as the 47 capability of Li isotopes as hydrogeological tracers was earlier demonstrated by Hogan and 48 Blum (2003). As one aim of the work was to determine geochemical constraints on the 49 hydrological functioning of a peatland, our primary objective was to constrain hydro-reservoir 50 signatures and the exchanges of water and solutes with adjacent ground and uplands. One 51 particularly important aspect of this work was to evaluate the mechanisms of water and solute 52 transfer between the reservoirs by applying Li as a new isotopic tracer. 53Lithium has two stable isotopes of mass 6 and 7, with natural abundances of 7.5% and 92.5% 54 respectively. Lithium is a mobile element that tends preferentially to go into the fluid phase 55 during water/rock interactions. The relative mass difference between the two isotopes is 56 considerable at 17%, generating significant mass-dependant fractionation during geochemical 57 processes. The range of variation in lithium-isotope compositions is more than 50‰ in 58 geological materials (see Coplen et al., 2002;Tomascak, 2004 for data compilation). As Li is 59 3 a recently developed isotopic tracer, not all the processes that could induce and control 60 isotopic fractionation are as yet well constrained. However, in the context of water/rock 61 interactions, numerous studies (Huh et al., 1998(Huh et al., , 2001Pistiner et al., 2003; Kisakurek et al., 62 2004 Kisakurek et al., 62 , 2005 Pogge von Strandmann et al., 2006;Millot et al., 2007Millot et al., , 2010aMillot et al., , 2010b have 63 clearly shown that isotopic fractionation ...

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Lithium isotopic systematics of submarine vent fluids from arc and back‐arc hydrothermal systems in the western Pacific

Araoka

Nishio

Gamo

et al. 2016

Geochem Geophys Geosyst

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The Li concentration and isotopic composition (d 7 Li) in submarine vent fluids are important for oceanic Li budget and potentially useful for investigating hydrothermal systems deep under the seafloor because hydrothermal vent fluids are highly enriched in Li relative to seawater. Although Li isotopic geochemistry has been studied at mid-ocean-ridge (MOR) hydrothermal sites, in arc and back-arc settings Li isotopic composition has not been systematically investigated. Here we determined the d 7 Li and 87 Sr/ 86 Sr values of 11 end-member fluids from 5 arc and back-arc hydrothermal systems in the western Pacific and examined Li behavior during high-temperature water-rock interactions in different geological settings. In sediment-starved hydrothermal systems (Manus Basin, Izu-Bonin Arc, Mariana Trough, and North Fiji Basin), the Li concentrations (0.23-1.30 mmol/kg) and d 7 Li values (14.3& to 17.2&) of the end-member fluids are explained mainly by dissolution-precipitation model during high-temperature seawater-rock interactions at steady state. Low Li concentrations are attributable to temperature-related apportioning of Li in rock into the fluid phase and phase separation process. Small variation in Li among MOR sites is probably caused by low-temperature alteration process by diffusive hydrothermal fluids under the seafloor. In contrast, the highest Li concentrations (3.40-5.98 mmol/kg) and lowest d 7 Li values (11.6& to 12.4&) of end-member fluids from the Okinawa Trough demonstrate that the Li is predominantly derived from marine sediments. The variation of Li in sediment-hosted sites can be explained by the differences in degree of hydrothermal fluid-sediment interactions associated with the thickness of the marine sediment overlying these hydrothermal sites. Key Points:First Li isotopic report on submarine vent fluids from arc and back-arc hydrothermal systems Li in vent fluids can be explained mainly by dissolution-precipitation model during seawater-rock and seawater-sediment interactions Variation in Li due to diffusive hydrothermal fluid and the degree of hydrothermal fluid-sediment interaction

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Accurate and High‐Precision Measurement of Lithium Isotopes in Two Reference Materials by MC‐ICP‐MS

Cited by 174 publications

References 23 publications

Lithium isotopes in island arc geothermal systems: Guadeloupe, Martinique (French West Indies) and experimental approach

Lithium isotopes in island arc geothermal systems: Guadeloupe, Martinique (French West Indies) and experimental approach

Lithium isotopes as tracers of groundwater circulation in a peat land

Lithium isotopic systematics of submarine vent fluids from arc and back‐arc hydrothermal systems in the western Pacific

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