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• W3148761964 abstract "Studies of carbonate carbon isotope of loess/ paleosol (d 13 Ccarb) in the Chinese Loess Plateau (CLP) have shown d 13 Ccarb less negative in loess and more neg- ative in paleosol, which is opposite to that of bulk organic matter. Although some mechanisms have been proposed to explain this inconsistency, few studies have been con- ducted to investigate how carbonate migration could affect the reliability of utilizing d 13 Ccarb as an effective indicator. Here, a loess/paleosol profile with a nodule horizon inter- calated in the loess layer, located on the southeastern edge of the CLP, was investigated to understand the influence of carbonate eluviation and reprecipitation on d 13 Ccarb along the section. The mean grain size and magnetic suscepti- bility generally conform to the field observed loess/paleo- sol stratigraphy. However, carbonate content shows distinct differences in the two sides of the nodule horizon, clearly indicating eluviation along the section. The variation of carbon and oxygen isotopic compositions of soil carbonate (d 13 CSC and d 18 OSC) and nodule carbonate (d 13 CNC and d 18 ONC) along the profile does not present a clearly meaningful picture. Generally, d 13 CSC and d 18 OSC have a similar change trend along the profile and are positively correlated, but there is no apparent relationship between d 13 CNC and d 18 ONC. More importantly, d 18 ONC values fall in the range of d 18 OSC, whereas d 13 CNC values are much more positive than d 13 CSC. Detailed analyses of the data indicate migration of carbonate along the profile, which is an important factor that determines that loess/paleosol d 13 Ccarb could not be employed as a high-resolution paleovegetational and paleoenvironmental indicator in the CLP, at least on or below the glacial/interglacial scales." @default.
• W3148761964 created "2021-04-13" @default.
• W3148761964 creator A5033327343 @default.
• W3148761964 creator A5051610097 @default.
• W3148761964 date "2011-01-01" @default.
• W3148761964 modified "2023-09-27" @default.
• W3148761964 title "Stable carbon and oxygen isotopic study of carbonate along a loess/paleosol section in Lantian County, Shaanxi Province, on the southeastern edge of the Chinese Loess Plateau" @default.
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