A secondary isotopic standard for 6Li/7Li determinations

Flesch, G. D.; Anderson, Arthur R.; Svec, Harry J.

doi:10.1016/0020-7381(73)80043-9

Cited by 299 publications

(136 citation statements)

References 8 publications

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“…Because the mass difference between these two isotopes is relatively large (approximately 16%), they show significant mass dependent fractionation in nature (>50‰) (12), expressed in δ 7 Li notation: δ 7 Lið‰Þ ¼ ð½ 7 Li∕ 6 Li sample ∕½ 7 Li∕ 6 Li standard − 1Þ × 1000, where the standard used is a synthetic Li carbonate, L-SVEC (13). During chemical weathering, secondary minerals, such as clays, take 6 Li preferentially into their structure, resulting in heavier Li isotopic composition in rivers and lighter isotopic composition in the regolith (14)(15)(16)(17)(18)(19)(20)(21)(22).…”

Section: Lithium Isotopesmentioning

confidence: 99%

Constraints on continental crustal mass loss via chemical weathering using lithium and its isotopes

Liu

Rudnick

2011

Proc. Natl. Acad. Sci. U.S.A.

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Chemical weathering, as well as physical erosion, changes the composition and shapes the surface of the continental crust. However, the amount of continental material that has been lost over Earth’s history due to chemical weathering is poorly constrained. Using a mass balance model for lithium inputs and outputs from the continental crust, we find that the mass of continental crust that has been lost due to chemical weathering is at least 15% of the original mass of the juvenile continental crust, and may be as high as 60%, with a best estimate of approximately 45%. Our results suggest that chemical weathering and subsequent subduction of soluble elements have major impacts on both the mass and the compositional evolution of the continental crust.

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Section: Lithium Isotopesmentioning

confidence: 99%

Constraints on continental crustal mass loss via chemical weathering using lithium and its isotopes

Liu

Rudnick

2011

Proc. Natl. Acad. Sci. U.S.A.

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“…The isotopic measurements were carried out on a Finnigan MAT 262 thermal ionization mass spectrometer with double Re filaments. Lithium isotopic compositions are reported as 66Li relative to a U.S. National Bureau of Standards isotope standard (L-SVEC) (Flesch et al 1973):…”

Section: Lithium and Lithium Isotopes-lithiummentioning

confidence: 99%

Minor and trace element chemistry of Lake Baikal, its tributaries, and surrounding hot springs

Falkner

Church

Measures

et al. 1997

Limnology & Oceanography

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A Russian-American fieldwork effort on Lake Baikal, its tributaries, and surrounding hot springs was undertaken in June-July 1991. Here we report on aspects of major ion (Ca 2+, Mg2+, Na+, K+, Alk, Cl-, SOJ2-) and several minor and trace element (Li isotopes, Sr isotopes, Ba, Al, V, Cr, Ni, Cu, Ge, Cd, Hg, U) cycles. Our riverine data for major ions generally concur with the more extensive, time-averaged Russian database; for the most part the homogeneously distributed major ions appear to be at steady state and dominated by riverine throughputs in the lake. Exceptions include Mg2+, which may be removed to a small extent (I 15% of its riverine flux) by hydrothermal activity, and Na+ and Cl-, which seem to be impacted by pollution. Of the minor and trace elements, V also seems subject to anthropogenic disturbance. Other elements for which reliable data are available show conservative steadystate distributions (Li, Cr, Sr) or are subject to redistribution and removal within the lake (Ge, Al, Cu, Ni, Ba, U) as a result of involvement in a variety of particle cycling processes that tend to obscure non-natural influences. Chemical geothermometers for the four hot springs sampled (Smeyney, Khakuci, Kotelnikovski, Davsha) indicate subsurface reaction temperatures ranging from 70 to 150°C and converging to smaller ranges (5 15°C) for a given spring. Both depletions (Mg, Ba, Cu, Ni, Sr, U) and enrichments (Na, K, Cl, Li, Al, Gc, Sr, U) with respect to lake water were observed. Ge levels in spring waters are sufficiently enriched over lake waters that Ge could serve as a useful tracer of subaquatic hydrothermal waters. AcknowledgmentsWe thank E. Carmack, F! Salameh, R. Weiss, R. Williams, and N. Williams for assistance with sample collection and hydrographic work. We are grateful to the officers and crew of the RV Vereshchagin and RV Obruchev for help with all aspects of the fieldwork. Logistical support in Russia was provided by the Siberian Branch of the Russian Academy of Sciences with the invaluable help of M. Grachev and other members of the Limnological Institute of Irkutsk.

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“…A few selected samples show LREE enrichment (Fig. 2c) (Flesch et al, 1973), which was diluted to within ± 10% of the concentration of the samples. 175…”

Section: Geological Background and Samples 91mentioning

confidence: 99%

The influence of melt infiltration on the Li and Mg isotopic composition of the Horoman Peridotite Massif

Lai

Strandmann

Dohmen

et al. 2015

Geochimica et Cosmochimica Acta

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A secondary isotopic standard for 6Li/7Li determinations

Cited by 299 publications

References 8 publications

Constraints on continental crustal mass loss via chemical weathering using lithium and its isotopes

Constraints on continental crustal mass loss via chemical weathering using lithium and its isotopes

Minor and trace element chemistry of Lake Baikal, its tributaries, and surrounding hot springs

The influence of melt infiltration on the Li and Mg isotopic composition of the Horoman Peridotite Massif

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