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Tectonic and climatic controls on provenance changes of fine-grained dust on the Chinese Loess Plateau since the late Oligocene
Yan, Yan1,2; Ma, Long1,3; Sun, Youbin1,4
2017-03-01
发表期刊GEOCHIMICA ET COSMOCHIMICA ACTA
卷号200期号:2017页码:110-122
文章类型Article
摘要Provenance variations of Late Cenozoic aeolian deposits on the Chinese Loess Plateau (CLP) were closely associated with regional tectonic activity and climatic change. Previous studies, however, have not reached a consensus regarding the nature and origin of past variations in source. This study presents the results of oxygen isotope (delta O-18) analyses of fine-grained quartz (< 16 mu m) extracted from aeolian deposits on the CLP since the late Oligocene. The quartz delta O-18 variations exhibit distinct trends and patterns of variation over six time intervals (i.e. 25-20, 20-12, 12-7, 7-2.6, 2.6-1.2, and 1.2-0 Ma). In comparison with quartz delta O-18 results from East Asian dust sources and previous provenance studies of the same aeolian sequences, we identify three significant composition changes of the dust source system at around 20, 12, and 2.6 Ma. The dust source system was also rather unstable at 25-20, 12-7 and 1.2-0 Ma, while three stable stages occurred at 20-12, 7-2.6, and 2.6-1.2 Ma. The correlation between the provenance changes and paleoclimatic and tectonic evidence suggests that both tectonic and climatic factors were important in driving the observed stepwise provenance changes. However, the changes were mainly constrained by Tibetan Plateau uplift prior to the Quaternary, and by global climate change thereafter. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Provenance Change Tectonic And Climatic Controls Chinese Loess Plateau
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.gca.2016.12.009
关键词[WOS]NORTHEASTERN TIBETAN PLATEAU ; FISSION-TRACK THERMOCHRONOLOGY ; PAST 7 MA ; ASIAN DUST ; EARLY MIOCENE ; EOLIAN DEPOSITS ; OXYGEN ISOTOPES ; PALEOCLIMATIC IMPLICATIONS ; COEXISTING MINERALS ; METAMORPHIC ROCKS
收录类别SCI
语种英语
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000396792700007
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5519
专题古环境研究室
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
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Yan, Yan,Ma, Long,Sun, Youbin. Tectonic and climatic controls on provenance changes of fine-grained dust on the Chinese Loess Plateau since the late Oligocene[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2017,200(2017):110-122.
APA Yan, Yan,Ma, Long,&Sun, Youbin.(2017).Tectonic and climatic controls on provenance changes of fine-grained dust on the Chinese Loess Plateau since the late Oligocene.GEOCHIMICA ET COSMOCHIMICA ACTA,200(2017),110-122.
MLA Yan, Yan,et al."Tectonic and climatic controls on provenance changes of fine-grained dust on the Chinese Loess Plateau since the late Oligocene".GEOCHIMICA ET COSMOCHIMICA ACTA 200.2017(2017):110-122.
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