Geochemistry of the Xining, Xifeng and Jixian sections, Loess Plateau of China: eolian dust provenance and paleosol evolution during the last 140 ka

Jahn, Bor‐ming; Gallet, Sylvain; Jian-guo, Han

doi:10.1016/s0009-2541(00)00430-7

Cited by 371 publications

(309 citation statements)

References 45 publications

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“…The Eu Ã varies from 0.61 to 0.66, with an average of 0.633 ± 0.014 (1r). This value is very close to that of the PAAS, about 0.632 (McLennan, 1989), and the average of some selected loess samples (0.631 ± 0.014) from Xining, Xifeng, and Jixian, which are located at the west, center, and east of the Loess Plateau, respectively (Jahn et al, 2001).…”

Section: Provenance Of the Silicate Materialssupporting

confidence: 84%

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Major and trace elements of a peat core from Yunnan, Southwest China: Implications for paleoclimatic proxies

Wei

Xie

Sun

et al. 2012

Journal of Asian Earth Sciences

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Section: Provenance Of the Silicate Materialssupporting

confidence: 84%

“…8). The loess samples of Jahn et al (2001) are also plotted in this diagram for comparison. The peat samples are shown in the separated sections mentioned above (Fig.…”

Section: Provenance Of the Silicate Materialsmentioning

confidence: 99%

Major and trace elements of a peat core from Yunnan, Southwest China: Implications for paleoclimatic proxies

Wei

Xie

Sun

et al. 2012

Journal of Asian Earth Sciences

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“…It is one of the most classic loess sections where a large number of research has been previously carried out [5,6,10,[26][27][28][29][30][31][32][33]. Studies on fossil land snail assemblages since the last glacial are also well documented [32,33].…”

Section: Fossil Land Snail Samplesmentioning

confidence: 99%

Variability of snail growing season at the Chinese Loess Plateau during the last 75 ka

Huang

et al. 2011

Chin. Sci. Bull.

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Knowledge of seasonal climate change is one of the key issues facing Quaternary paleoclimatic studies and estimating seasonal climate change is difficult, especially changes such as seasonal length on glacial-interglacial timescales. The stable isotope composition from seasonal land snail shells provides the potential to reveal seasonal climatic features. Two modern land snail species, cold-aridiphilous Pupilla aeoli and thermo-humidiphilous Punctum orphana, were collected from different climatic zones in 18 localities across the Chinese Loess Plateau, spanning 11 degrees of longitude and covering a range of 1000 km 2 . The duration of the snail growing season (temperature ≥10°C) was shorter (202 ± 6 d) in the eastern Loess Plateau compared with in the western Loess Plateau (162 ±7 d). The δ 13 C of P. aeoli shells was −9.1‰ to −4.7‰ and −5.0‰ to 0.3‰ for δ 18 O. For P. orphana, the δ 13 C ranged from −9.1‰ to −1.9‰ and −8.9‰ to −2.9‰ for δ 18 O. Both the δ 13 C and δ 18 O differences between the two snail species were reduced from the east to the western Loess Plateau (2.8‰ to 0.2 ± 1.1‰ for δ 13 C and 4.7‰ to 2.9 ± 1.3‰ for δ 18 O). These isotopic differences roughly reflect the difference in the growing season lengths between the east and west Loess Plateau indicating that the duration of the snail growing season shortens by 15 d or 19 d if the difference decreases by 1‰ in δ 13 C or δ 18 O, respectively. Thus, the difference in δ 13 C and δ 18 O between both snail species can be used to reveal the length of the snail growing season in the past. Based on our investigation, the length of the snail growing seasons from the Xifeng region during the last 75 ka was reconstructed. During the mid-Holocene (8-3 ka), the mean isotopic difference from both snail species reached maximum values of 2.6 ± 0.7‰ and 2.1 ± 1.4‰ for δ 13 C and δ 18 O, respectively. This was followed by MIS 3 that ranged from 2.5 ± 0.4‰ for δ 13 C and 1.6 ± 0.8‰ for δ 18 O. The Last Glacial Maximum changed by only 0.2‰ and 0.4‰ for δ 13 C and δ 18 O, respectively. Therefore, we estimate that the duration of the snail growing seasons to be ~200 ± 10 d during the mid-Holocene, 190 ± 6 d in MIS 3 and 160 ± 3 d during the last glacial period. . In other words, long-term climate change is governed by the variation of seasonality or seasonal length [2]. Knowing how seasonal lengths shifted during Quaternary G-IG cycles is an important key to further understanding the processes and mechanisms of long-term climate change. Climate in the Chinese Loess Plateau is significantly controlled by the East Asian winter and summer monsoon, with distinct seasonal changes that can be divided into four seasons. These are based on a pentad-temperature method that is a mean value of per five-day temperature [3]. Temperatures lower than 10°C are attributed to winter and those over 22°C to summer. Pentad temperatures between 10°C and 22°C are either spring or autumn [3]. It is generally accepted that in the monsoon regions, the seasonal length

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“…Based on chemical (major and trace element) and isotopic (Sr, Nd) analyses of the Luochuan loess-paleosol sequence, Gallet et al (1996) concluded that systematic variations of element abundances and ratios between loess and paleosols can be used as chemical indicators for pedogenetic intensity and so for paleoclimatic change. But the correlation between precipitation and chemistry was not exist in Jahn et al's (2001) study in other three sites (Xining, Xifeng, Jixian) on the Chinese Loess Plateau. Maher et al (1994) proposed a mineral magnetic approach for estimating palaeoprecipitation across the Chinese Loess Plateau.…”

Section: Introductionmentioning

confidence: 73%

Holocene Soil Chronofunctions, Luochuan, Chinese Loess Plateau

Liu¹,

Xu²,

Zhang³

et al. 2012

Radiometric Dating

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Geochemistry of the Xining, Xifeng and Jixian sections, Loess Plateau of China: eolian dust provenance and paleosol evolution during the last 140 ka

Cited by 371 publications

References 45 publications

Major and trace elements of a peat core from Yunnan, Southwest China: Implications for paleoclimatic proxies

Major and trace elements of a peat core from Yunnan, Southwest China: Implications for paleoclimatic proxies

Variability of snail growing season at the Chinese Loess Plateau during the last 75 ka

Holocene Soil Chronofunctions, Luochuan, Chinese Loess Plateau

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