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Evaluating the paleoclimatic significance of clay mineral records from a late Pleistocene loess-paleosol section of the Ili Basin, Central Asia
Li, Yue1,2; Song, Yougui1,3; Zeng, Mengxiu4; Lin, Weiwei1; Orozbaev, Rustam3,5; Cheng, Liangqing1,2; Chen, Xinli6; Halmurat, Tiliwaldi6
2018-05-01
发表期刊QUATERNARY RESEARCH
卷号89期号:3页码:660-673
文章类型Article
摘要In this study, we present clay mineral records from a late Pleistocene loess-paleosol sequence in the Ili Basin, Central Asia, and assess their significance for paleoclimatic reconstruction. The results show that the clay minerals are mainly illite (average 60%) and chlorite (28%), with minor kaolinite (9%) and smectite (3%). Illite was of detrital origin with no obvious modification to its crystal structure. Increases in illite content in the loess are ascribed to wind intensity rather than pedogenesis. High proportions of illite in the clay fraction, and of muscovite in the bulk samples of the paleosol units, may lead to an overestimation of the weathering intensity. Kaolinite was likely inherited from the sedimentary rocks, while chlorite might have been inherited from both sedimentary and metamorphic rocks. The paleoclimatic signals of kaolinite and chlorite were unclear, due to reworking by both fluvial and eolian systems. Smectite was more likely formed by the transformation of biotite and illite, and its variation in the loess sequence was also controlled by wind intensity; this was largely due to aggregation and is unlikely to reflect moisture changes. Although the interpretation of paleoclimate evolution may contain some uncertainties, clay mineralogy does provide the possibility of tracing dust provenance.
关键词Ili Loess Clay Mineral Genesis Paleoclimate
WOS标题词Science & Technology ; Physical Sciences
DOI10.1017/qua.2017.58
关键词[WOS]GREENLAND ICE CORE ; LATE QUATERNARY LOESS ; GRAIN-SIZE ; ENVIRONMENTAL SIGNIFICANCE ; TIANSHAN MOUNTAINS ; MONSOON EVOLUTION ; TIBETAN PLATEAU ; CLIMATIC-CHANGE ; NORTHERN CHINA ; MCMURDO SOUND
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000432179700005
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5143
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, 97 Yanxiang Rd, Xian 710061, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecol & Environm Cent Asia, Urumqi 830011, Peoples R China
4.Nanjing Univ, Coll Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China
5.Natl Acad Sci, Inst Geol, Bishkek 720040, Kyrgyzstan
6.Environm Monitoring Stn Ili Kazakh Autonomo Prefe, Yining 835000, Peoples R China
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Li, Yue,Song, Yougui,Zeng, Mengxiu,et al. Evaluating the paleoclimatic significance of clay mineral records from a late Pleistocene loess-paleosol section of the Ili Basin, Central Asia[J]. QUATERNARY RESEARCH,2018,89(3):660-673.
APA Li, Yue.,Song, Yougui.,Zeng, Mengxiu.,Lin, Weiwei.,Orozbaev, Rustam.,...&Halmurat, Tiliwaldi.(2018).Evaluating the paleoclimatic significance of clay mineral records from a late Pleistocene loess-paleosol section of the Ili Basin, Central Asia.QUATERNARY RESEARCH,89(3),660-673.
MLA Li, Yue,et al."Evaluating the paleoclimatic significance of clay mineral records from a late Pleistocene loess-paleosol section of the Ili Basin, Central Asia".QUATERNARY RESEARCH 89.3(2018):660-673.
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