Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Wu, Chao1,3; Zheng, Xiangmin2; Qian, Peng4; Qu, Pan5; He, Miaohong1,3; Wei, Gangjian1,3
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| Provenances of the Oldest Xiashu loess and Xuancheng loess in southern China: Implications for dust transport and dust proxies of the East Asian winter monsoon | |
| Source Publication | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| ISSN | 0031-0182 |
| 2023-03-15 | |
| Volume | 614Pages:14 |
| DOI | 10.1016/j.palaeo.2023.111440 |
| Language | 英语 |
| WOS Research Area | Physical Geography ; Geology ; Paleontology |
| Abstract | The loess-paleosol sequences of southern China are valuable paleoclimatic archives since the Middle Pleistocene, on the regional and global scales. Knowledge of loess provenance can shed light on dust transport and the development of paleoclimatic proxies for loess deposits. However, there is a research gap regarding the prove-nance of the Oldest (similar to 0.9 Ma) Xiashu loess near the Yangtze River valley. The precise source area of the Xuancheng loess in southern China remains to be unidentified. In this study, we used elemental geochemistry and detrital zircon U-Pb ages to identify the sources of the Oldest Xiashu loess and Xuancheng loess in southern China. The Oldest Xiashu loess is dominantly derived from Yangtze River sediments, and part of its fine-grained dust component originates from the arid regions of Central Asia or northern China. The elemental compositions of the size-fractionated silicates and detrital zircon U-Pb ages of the Xuancheng loess are like those of the Shuiyang River sediments in the Xuancheng region. These results demonstrate that the Xuancheng loess is mainly the product of local dust activity in the Xuancheng regions, and thus that the Xiashu and Xuancheng loess are the products of independent dust transport processes. This spatial differentiation of loess provenance may be a widespread phenomenon in southern China, and consequently, the grain size compositions of the various loess sections in southern China cannot be used to recover paleo-wind directions on a regional scale. Overall, our study shows that when the grain size compositions from the southern China loess are used to reconstruct East Asian winter monsoon intensity, the signals from local wind fields should first be removed. |
| Keyword | Xiashu loess Xuancheng loess ZirconU-Pb age Elemental geochemistry Provenance |
| WOS ID | WOS:000990796800001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74210 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Wu, Chao; Zheng, Xiangmin; Qian, Peng; Wei, Gangjian |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.East China Normal Univ, Minist Educ, Key Lab Geoinformat Sci, Shanghai 200241, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China 4.Nantong Univ, Sch Geog, Nantong 226007, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Chao,Zheng, Xiangmin,Qian, Peng,et al. Provenances of the Oldest Xiashu loess and Xuancheng loess in southern China: Implications for dust transport and dust proxies of the East Asian winter monsoon[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2023,614:14. |
| APA | Wu, Chao,Zheng, Xiangmin,Qian, Peng,Qu, Pan,He, Miaohong,&Wei, Gangjian.(2023).Provenances of the Oldest Xiashu loess and Xuancheng loess in southern China: Implications for dust transport and dust proxies of the East Asian winter monsoon.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,614,14. |
| MLA | Wu, Chao,et al."Provenances of the Oldest Xiashu loess and Xuancheng loess in southern China: Implications for dust transport and dust proxies of the East Asian winter monsoon".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 614(2023):14. |
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