globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.05.025
Scopus记录号: 2-s2.0-85020941320
论文题名:
Tectonic uplift-influenced monsoonal changes promoted hominin occupation of the Luonan Basin: Insights from a loess-paleosol sequence, eastern Qinling Mountains, central China
作者: Fang Q.; Hong H.; Zhao L.; Furnes H.; Lu H.; Han W.; Liu Y.; Jia Z.; Wang C.; Yin K.; Algeo T.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169
起始页码: 312
结束页码: 329
语种: 英语
英文关键词: East Asian monsoon ; Paleoclimatology ; Pedogenic weathering ; Pleistocene ; Rare earth elements ; Sediment mineralogy
英文摘要: Quaternary soil deposits from northern and southern China are distinctly different, reflecting variability of the East Asian monsoon north and south of the Qinling Mountains. Coeval sediments from the transitional climatic zone of central China, which are little studied to date, have the potential to improve our understanding of Quaternary monsoon changes and associated influences on hominin occupation of this region. Here, we investigate in detail a well-preserved and continuous Quaternary loess-paleosol sequence (Shangbaichuan) from the Luonan Basin, using a variety of weathering indices including major and trace element ratios, clay mineralogy, and Fe-oxide mineralogy. The whole-rock samples display similar rare earth element patterns characterized by upper continental crustal ratios: (La/Yb)N ≈ 9.5 and Eu/Eu: ≈ 0.65. Elemental data such as (La/Yb)N, La/Th and Eu/Eu: ratios show a high degree of homogeneity, suggesting that dust in the source region may have been thoroughly mixed and recycled, resulting in all samples having a uniform initial composition. Indices for pedogenic weathering such as Na/K, Ba/Sr, Rb/Sr, CIA, CIW, CPA, PIA, kaolinite/illite, (kaolinite + smectite)/illite, and hematite/(hematite + goethite) exhibit similar secular trends and reveal a four-stage accumulation history. The indices also indicate that the climate was warmer and wetter during the most recent interglacial stage, compared with coeval environments of the Chinese Loess Plateau. Secular changes in weathering intensity can be related to stepwise uplift of the Qinling Mountains and variation in East Asian monsoon intensity, both of which played significant roles in controlling climate evolution in the Luonan Basin. Furthermore, intensified aridity and winter monsoon strength in dust source areas, as evidenced by mineralogic and geochemical changes, may have been due to the mid-Pleistocene climate transition. Based on temporal correlation of warmer and wetter climatic conditions with more frequent hominin occupation, we infer that the paleoclimate in the eastern Qinling Mountains remained mild and favorable during glacial stages of the Late Quaternary, thus promoting early human settlement. © 2017 Elsevier Ltd
资助项目: This work was supported by the NSFC (Project Number 41272053 and 41472041), NSFC for Young Scholars (41402036 and 41602037), NSF of Hubei for Young Scholars (2016CFB183), Postdoctoral Science Foundation of China (2015M582301), and Fundamental Research Funds for Central Universities (Wuhan, CUG160848). Q. Fang acknowledges the China Scholarship Council (CSC) for financial support (201706410017). We thank Feng Cheng, Hongyu Zhao, Yao Xiao and Na Yue for sample preparations, and Zhao Liu, Shuling Chen, Hao Yang, Yuheng Fang, Tingwang Yin, Haihong Chen and Jishun Yu for their helps with experimental analyses. We also thank Prof. Xiaoping Yang, and two anonymous reviewers for thoughtful and constructive reviews of the manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59167
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Biogeology and Environmental Geology & School of Earth Sciences, China University of Geosciences, Wuhan, China; Department of Earth Science & Centre for Geobiology, University of Bergen, Allegt. 41, Bergen, Norway; School of Geographic and Oceanographic Sciences, Nanjing University, Jiangsu Collaborative Innovation Center for Climate Change, Nanjing, China; National Gems & Jewelry Technology Administrative Center, Beijing, China; Gemological Institute, China University of Geosciences, Wuhan, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China; Department of Geology, University of Cincinnati, Cincinnati, OH, United States

Recommended Citation:
Fang Q.,Hong H.,Zhao L.,et al. Tectonic uplift-influenced monsoonal changes promoted hominin occupation of the Luonan Basin: Insights from a loess-paleosol sequence, eastern Qinling Mountains, central China[J]. Quaternary Science Reviews,2017-01-01,169
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