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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
Source PublicationQUATERNARY RESEARCH
Volume89Issue:3Pages:660-673
SubtypeArticle
AbstractIn 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.
KeywordIli Loess Clay Mineral Genesis Paleoclimate
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1017/qua.2017.58
WOS KeywordGREENLAND ICE CORE ; LATE QUATERNARY LOESS ; GRAIN-SIZE ; ENVIRONMENTAL SIGNIFICANCE ; TIANSHAN MOUNTAINS ; MONSOON EVOLUTION ; TIBETAN PLATEAU ; CLIMATIC-CHANGE ; NORTHERN CHINA ; MCMURDO SOUND
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000432179700005
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5143
Collection古环境研究室
Affiliation1.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
Recommended Citation
GB/T 7714
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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