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Late Miocene Intensified Tectonic Uplift and Climatic Aridification on the Northeastern Tibetan Plateau: Evidence From Clay Mineralogical and Geochemical Records in the Xining Basin
Yang, RS (Yang, Rongsheng)1,2,3,4; Yang, YB (Yang, Yibo)1,5; Fang, XM (Fang, Xiaomin)1,2,5; Ruan, XB (Ruan, Xiaobai)1,2,3,4; Galy, A (Galy, Albert)3,4; Ye, CC (Ye, Chengcheng)1; Meng, QQ (Meng, Qingquan)6,7
Source PublicationGEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
2019
Volume20Issue:2Pages:829-851
DOI10.1029/2018GC007917
Abstract

The uplift of the Tibetan Plateau (TP) during the late Cenozoic is thought to be one of crucial factors controlling Asian climate. However, the complex interaction between tectonics and climate change is still unclear. Here we present the first record of clay mineralogy and elemental geochemistry covering 12.7-4.8Ma in a fluvial-lacustrine sequence in the Xining Basin. Geochemical provenance proxies (Th/Sc, Zr/Sc, and Cr/Zr) in the <2-m fraction show a significant provenance change at 8.8Ma. Silicate-based weathering indexes (CIA, CIW, and PIA) displayed coeval changes with provenance but discrepant changes with regional climate. Since the clay mineralogy exhibits significant change at 7.8Ma uncorrelated with modifications in provenance, it can be employed to reveal regional climate change. The rise in illite and associated decrease in the sum of smectite and illite/smectite mixed layers reflect gradual and slow aridification since 12.7Ma with intensified drying since 7.8Ma until approaching the modern climate status. Our results, together with other regional climatic and tectonic records, clearly illustrate that accelerated uplift of the northeastern TP since 8-9Ma has mainly modulated the regional erosion, weathering, transportation, and sedimentation and amplified the global cooling and drying trend toward the regional climate of modern conditions. Our study suggests that in the tectonically active northeastern TP, a comprehensive mineralogical and geochemical investigation of the fine-grained fraction of the basin sediments could retrieve the interactions between tectonics and climate behind the complex change in exhumed lithology and sedimentary routing systems.

Subject AreaGeosciences
WOS IDWOS:000461745200015
Language英语
Indexed BySCI
KeywordSouth China Sea East-asian Monsoon North Pacific-ocean Tarim Basin Linxia Basin Qaidam Basin Paleoclimatic Interpretation Stepwise Aridification Sedimentary Archive Cenozoic Evolution
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
Cooperation Status国际
ISSN1525-2027
Department大陆碰撞与高原隆升
URL查看原文
PublisherAMER GEOPHYSICAL UNION
SubtypeArticle
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9403
Collection图书馆
Corresponding AuthorFang, XM (Fang, Xiaomin)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China;
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China;
3.CNRS, UMR7358, Ctr Rech Petrograph & Geochim, Vandoeuvre Les Nancy, France;
4.Univ Lorraine, Vandoeuvre Les Nancy, France;
5.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
6.Lanzhou Univ, Sch Earth Sci, Lanzhou, Gansu, Peoples R China;
7.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou, Gansu, Peoples R China;
8.Linyi Univ, Coll Resources & Environm, Linyi, Peoples R China.
Recommended Citation
GB/T 7714
Yang, RS ,Yang, YB ,Fang, XM ,et al. Late Miocene Intensified Tectonic Uplift and Climatic Aridification on the Northeastern Tibetan Plateau: Evidence From Clay Mineralogical and Geochemical Records in the Xining Basin[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(2):829-851.
APA Yang, RS .,Yang, YB .,Fang, XM .,Ruan, XB .,Galy, A .,...&Meng, QQ .(2019).Late Miocene Intensified Tectonic Uplift and Climatic Aridification on the Northeastern Tibetan Plateau: Evidence From Clay Mineralogical and Geochemical Records in the Xining Basin.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(2),829-851.
MLA Yang, RS ,et al."Late Miocene Intensified Tectonic Uplift and Climatic Aridification on the Northeastern Tibetan Plateau: Evidence From Clay Mineralogical and Geochemical Records in the Xining Basin".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.2(2019):829-851.
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