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Geochemical records of Qionghai Lake sediments in southwestern China linked to late Quaternary climate changes

文献类型：期刊论文

作者Wang, Gen4; Wang, Yongli1,3; Wei, Zhifu4; He, Wei2,4; Zhang, Ting2,4; Ma, Xueyun2,4
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2020-12-15
卷号560页码:15
关键词Sediment provenance Chemical weathering effective humidity Elements geochemistry Sichuan Province
ISSN号0031-0182
DOI10.1016/j.palaeo.2020.109902
英文摘要Knowledge of the chemical weathering history under the subtropical monsoonal climate will help to resolve the discrepancies regarding how climate conditions constrain chemical weathering. Major element and rare earth element (REE) compositions of the Qionghai Lake sediments in Sichuan Province, southwestern China were analyzed, aiming to provide information on sediment source discrimination and history of chemical weathering intensities and its responses to variations of Indian summer monsoon (ISM) and paleoclimate conditions. As revealed by the A-CN-K diagram and other provenance proxies including TiO2/Zr ratio, Th/Sc vs. Zr/Sc and La/Th vs. Hf diagrams, as well as the REE characteristics, the source of Qionghai Lake sediments was felsic rocks. Additionally, these sediments were subjected to small changes in provenance, sedimentary sorting and recycling, and weak diagenesis after deposition and/or metasomatism, indicating original signals were maintained on the intensity of chemical weathering of source area. The chemical weathering intensities inferred from CIA (chemical index of alteration) values have significantly fluctuated over the past 28 kyr, reflecting three stages of paleoclimate evolution, which is consistent with grain size characteristics, carbonate contents, low-frequency magnetic susceptibilities, TOC and biomarker proxy (Paq). The CIA values changed significantly during the typical warm and cold climate events including the Last Glacial Maximum, Heinrich 1 cold event, Younger Dryas and Holocene Climatic Optimum, and generally exhibited an increasing trend in amplitude correspondingly, in concert with the climate shifting from cold and dry to warm and humid conditions. Generally warm and humid climate conditions suggest enhanced chemical weathering intensity, whereas weak chemical weathering denotes cold and dry climate in the ISM region. In addition, sequential variations of the CIA values during the past 28 kyr may reflect changing chemical weathering processes, in responses to the varying intensities of Indian summer monsoon and the climate conditions forced by the Northern Hemisphere solar insolation.
WOS关键词NORTHWESTERN YUNNAN PROVINCE ; CHEMICAL-WEATHERING HISTORY ; HOLOCENE VEGETATION HISTORY ; ALPINE LACUSTRINE RECORD ; SUMMER MONSOON EVOLUTION ; LOESS-PALEOSOL SEQUENCE ; RARE-EARTH-ELEMENTS ; HIGH-RESOLUTION ; SOUTH CHINA ; NORTH CHINA
资助项目Second Tibetan Plateau Scientific Expedition and Research (STEP) Program[2019QZKK0707] ; National Key R&D Program of China[2017YFA0604803] ; Chinese Academy of Sciences Key Project[XDB26020302] ; National Natural Science Foundation of China[41831176] ; National Natural Science Foundation of China[41902028] ; National Natural Science Foundation of China[41972030] ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu[1309RTSA041]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:000591245000001
出版者ELSEVIER
资助机构Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu
源URL[http://ir.iggcas.ac.cn/handle/132A11/99893]  
专题地质与地球物理研究所_兰州油气中心
地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Wang, Yongli; Wei, Zhifu
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
4.Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Gen,Wang, Yongli,Wei, Zhifu,et al. Geochemical records of Qionghai Lake sediments in southwestern China linked to late Quaternary climate changes[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,560:15.
APA Wang, Gen,Wang, Yongli,Wei, Zhifu,He, Wei,Zhang, Ting,&Ma, Xueyun.(2020).Geochemical records of Qionghai Lake sediments in southwestern China linked to late Quaternary climate changes.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,560,15.
MLA Wang, Gen,et al."Geochemical records of Qionghai Lake sediments in southwestern China linked to late Quaternary climate changes".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 560(2020):15.

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来源：地质与地球物理研究所

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