Tectonic and climatic controls on provenance changes of fine-grained dust on the Chinese Loess Plateau since the late Oligocene
文献类型：期刊论文
| 作者 | Ma, Long1,3; Sun, Youbin3,4; Yan, Yan2,3 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 200期号:2017页码:110-122 |
| 关键词 | Provenance Change Tectonic And Climatic Controls Chinese Loess Plateau |
| DOI | 10.1016/j.gca.2016.12.009 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | NORTHEASTERN TIBETAN PLATEAU ; FISSION-TRACK THERMOCHRONOLOGY ; PAST 7 MA ; ASIAN DUST ; EARLY MIOCENE ; EOLIAN DEPOSITS ; OXYGEN ISOTOPES ; PALEOCLIMATIC IMPLICATIONS ; COEXISTING MINERALS ; METAMORPHIC ROCKS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000396792700007 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5519]  |
| 专题 | 地球环境研究所_古环境研究室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Long,Sun, Youbin,Yan, Yan. 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 | Ma, Long,Sun, Youbin,&Yan, Yan.(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 | Ma, Long,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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来源：地球环境研究所
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