Matches in SemOpenAlex for { <https://semopenalex.org/work/W4313644919> ?p ?o ?g. }
- W4313644919 endingPage "129" @default.
- W4313644919 startingPage "117" @default.
- W4313644919 abstract "The weathering of silicate rock is a major sink of atmospheric CO2 in the global carbon cycle and thus controls global climate change. Lithium (Li) isotopes are considered to be a sensitive proxy to trace the continental weathering, but factors controlling the fractionation behaviors of Li isotopes during chemical weathering of granite have not been addressed explicitly. Here, we present new Li isotope data of bulk samples, primary minerals, and secondary minerals from a granite weathering profile in South China to constrain the mechanisms of Li isotope fractionation during chemical weathering. The bulk samples of weathering products have relatively negative τLiTiO2 values ranging from −6.0% to −73.8% and δ7Li values ranging from −11.4‰ to +2.4‰. From the bottom to the top of the weathering profile, the pH gradually decreases (from 9.54 to 4.88). With decreasing pH, the Li concentrations of the weathered saprolites gradually decrease, while the δ7Li values of the saprolites decrease first and then increase. Li concentrations and Li isotope compositions of the constituent minerals vary considerably. Interestingly, Li isotope ratios of both the bulk samples and minerals show two distinct fractionation behaviors during chemical weathering under different pH conditions. The heavy isotope (7Li) is preferentially released into the liquid phase under basic and weakly acidic pH conditions and the light isotope (6Li) is preferentially released into the liquid phase under acidic pH conditions. This finding helps to explain the inconsistent fractionation behaviors of Li isotopes between laboratory experiments and field studies. The influence of pH on Li isotope fractionation during silicate weathering implies that the evolution of oceanic pH over geological time scales may partly account for the variations in oceanic Li isotope compositions." @default.
- W4313644919 created "2023-01-07" @default.
- W4313644919 creator A5021019207 @default.
- W4313644919 creator A5022607623 @default.
- W4313644919 creator A5047920896 @default.
- W4313644919 creator A5051145187 @default.
- W4313644919 creator A5052266895 @default.
- W4313644919 creator A5053185620 @default.
- W4313644919 creator A5059736541 @default.
- W4313644919 date "2023-03-01" @default.
- W4313644919 modified "2023-10-17" @default.
- W4313644919 title "Lithium isotope fractionation during the weathering of granite: Responses to pH" @default.
- W4313644919 cites W1452802022 @default.
- W4313644919 cites W1531643369 @default.
- W4313644919 cites W1625363718 @default.
- W4313644919 cites W1645311784 @default.
- W4313644919 cites W1840924118 @default.
- W4313644919 cites W1965347224 @default.
- W4313644919 cites W1970336648 @default.
- W4313644919 cites W1973219404 @default.
- W4313644919 cites W1975452494 @default.
- W4313644919 cites W1975773022 @default.
- W4313644919 cites W1984117161 @default.
- W4313644919 cites W1990749591 @default.
- W4313644919 cites W1992953710 @default.
- W4313644919 cites W1993307882 @default.
- W4313644919 cites W1994359551 @default.
- W4313644919 cites W2001939467 @default.
- W4313644919 cites W2002673413 @default.
- W4313644919 cites W2010487336 @default.
- W4313644919 cites W2011955045 @default.
- W4313644919 cites W2015191519 @default.
- W4313644919 cites W2017276220 @default.
- W4313644919 cites W2019736332 @default.
- W4313644919 cites W2023652180 @default.
- W4313644919 cites W2024693414 @default.
- W4313644919 cites W2027064284 @default.
- W4313644919 cites W2029401070 @default.
- W4313644919 cites W2029664473 @default.
- W4313644919 cites W2034800782 @default.
- W4313644919 cites W2040769498 @default.
- W4313644919 cites W2045823462 @default.
- W4313644919 cites W2048321874 @default.
- W4313644919 cites W2049712043 @default.
- W4313644919 cites W2050088334 @default.
- W4313644919 cites W2050208465 @default.
- W4313644919 cites W2050577824 @default.
- W4313644919 cites W2053626427 @default.
- W4313644919 cites W2055582531 @default.
- W4313644919 cites W2057228859 @default.
- W4313644919 cites W2064313765 @default.
- W4313644919 cites W2071069131 @default.
- W4313644919 cites W2071580378 @default.
- W4313644919 cites W2076125618 @default.
- W4313644919 cites W2083108669 @default.
- W4313644919 cites W2083753650 @default.
- W4313644919 cites W2084280680 @default.
- W4313644919 cites W2089797177 @default.
- W4313644919 cites W2129513697 @default.
- W4313644919 cites W2130176492 @default.
- W4313644919 cites W2132653020 @default.
- W4313644919 cites W2132923457 @default.
- W4313644919 cites W2158430310 @default.
- W4313644919 cites W2158909637 @default.
- W4313644919 cites W2192411401 @default.
- W4313644919 cites W2502666294 @default.
- W4313644919 cites W2569021949 @default.
- W4313644919 cites W2598532837 @default.
- W4313644919 cites W2680675303 @default.
- W4313644919 cites W2721850940 @default.
- W4313644919 cites W2790034524 @default.
- W4313644919 cites W2791848850 @default.
- W4313644919 cites W2807861450 @default.
- W4313644919 cites W2810017105 @default.
- W4313644919 cites W2909515086 @default.
- W4313644919 cites W2913177718 @default.
- W4313644919 cites W2939361347 @default.
- W4313644919 cites W2940300824 @default.
- W4313644919 cites W2951314372 @default.
- W4313644919 cites W2980427729 @default.
- W4313644919 cites W2999425131 @default.
- W4313644919 cites W3010555980 @default.
- W4313644919 cites W3038411759 @default.
- W4313644919 cites W3043719318 @default.
- W4313644919 cites W3090446831 @default.
- W4313644919 cites W3095810897 @default.
- W4313644919 cites W3098431251 @default.
- W4313644919 cites W3107106804 @default.
- W4313644919 cites W3132750749 @default.
- W4313644919 cites W3183950248 @default.
- W4313644919 cites W3193437674 @default.
- W4313644919 cites W3195454351 @default.
- W4313644919 cites W4200050745 @default.
- W4313644919 cites W926019900 @default.
- W4313644919 doi "https://doi.org/10.1016/j.gca.2022.12.028" @default.
- W4313644919 hasPublicationYear "2023" @default.
- W4313644919 type Work @default.
- W4313644919 citedByCount "1" @default.