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- W2000470427 abstract "Research Article| April 01, 2012 Microbial lipid records of highly alkaline deposits and enhanced aridity associated with significant uplift of the Tibetan Plateau in the Late Miocene Shucheng Xie; Shucheng Xie * 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK *E-mail: xiecug@163.com. Search for other works by this author on: GSW Google Scholar Richard D. Pancost; Richard D. Pancost 2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK Search for other works by this author on: GSW Google Scholar Lin Chen; Lin Chen 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China3State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Richard P. Evershed; Richard P. Evershed 2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK Search for other works by this author on: GSW Google Scholar Huan Yang; Huan Yang 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Kexin Zhang; Kexin Zhang 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Junhua Huang; Junhua Huang 3State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Yadong Xu Yadong Xu 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar Author and Article Information Shucheng Xie * 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK Richard D. Pancost 2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK Lin Chen 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China3State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China Richard P. Evershed 2Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre and the Cabot Institute, School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK Huan Yang 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China Kexin Zhang 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China Junhua Huang 3State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China Yadong Xu 1State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China *E-mail: xiecug@163.com. Publisher: Geological Society of America Received: 18 Jun 2011 Revision Received: 15 Oct 2011 Accepted: 27 Oct 2011 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (4): 291–294. https://doi.org/10.1130/G32570.1 Article history Received: 18 Jun 2011 Revision Received: 15 Oct 2011 Accepted: 27 Oct 2011 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Shucheng Xie, Richard D. Pancost, Lin Chen, Richard P. Evershed, Huan Yang, Kexin Zhang, Junhua Huang, Yadong Xu; Microbial lipid records of highly alkaline deposits and enhanced aridity associated with significant uplift of the Tibetan Plateau in the Late Miocene. Geology 2012;; 40 (4): 291–294. doi: https://doi.org/10.1130/G32570.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Saline alkaline sediments and soils are widespread in arid and semiarid regions, but their occurrence in ancient dry periods remains unknown due to the lack of a suitable proxy. On the basis of investigations of modern Chinese soils with a wide pH range of 3.5–9.1, we suggest that the microbial lipid ratio Ri/b, i.e., the abundance ratio of archaeal isoprenoid GDGTs (glycerol dialkyl glycerol tetraethers) to bacterial branched GDGTs, indicates the presence of drought-induced alkaline deposits in terrestrial settings. The Ri/b is invariant in modern soils with pH < 7.5 and when the local mean annual precipitation >600 mm, but it increases sharply at higher pH values and lower mean annual precipitation (<600 mm). In contrast, the CBT index (the cyclization ratio of branched GDGTs), which has been proposed to reflect environmental pH in other contexts, appears to be relatively stable in the highly alkaline Chinese soils from semiarid and arid regions investigated. We further explore the Ri/b ratio in a fluviolacustrine section in the Zhada basin of the southwestern Tibetan Plateau, covering the time period 9.2–2.6 m.y. ago. The Ri/b ratio remains relatively stable in most intervals but exhibits maxima in some horizons, indicative of the occurrence of severe drought and alkaline deposits in the basin catchment. These occur in fluvial sediments deposited 9 m.y. ago, a critical time with respect to the intensification of the East Asian and Indian monsoons, and the significant uplift of the plateau that has previously been associated with enhanced aridity in Central Asia. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2000470427 title "Microbial lipid records of highly alkaline deposits and enhanced aridity associated with significant uplift of the Tibetan Plateau in the Late Miocene" @default.
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