Tibetan uplift prior to the Eocene-Oligocene climate transition: Evidence from pollen analysis of the Xining Basin

Abstract

Research Article| December 01, 2008 Tibetan uplift prior to the Eocene-Oligocene climate transition: Evidence from pollen analysis of the Xining Basin G. Dupont-Nivet; G. Dupont-Nivet * 11Paleomagnetic Laboratory “Fort Hoofddijk”, Faculty of Geosciences, Utrecht University, Budapestlaan 17, 3584 CD Utrecht, The Netherlands *E-mail: gdn@geo.uu.nl Search for other works by this author on: GSW Google Scholar C. Hoorn; C. Hoorn 22Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Kruislaan 314, 1098 SM Amsterdam, The Netherlands Search for other works by this author on: GSW Google Scholar M. Konert M. Konert 33Sediment Analysis Laboratory, Faculty of Earth and Life Sciences (FALW), Free University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands Search for other works by this author on: GSW Google Scholar Geology (2008) 36 (12): 987–990. https://doi.org/10.1130/G25063A.1 Article history received: 21 Apr 2008 rev-recd: 19 Aug 2008 accepted: 03 Sep 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation G. Dupont-Nivet, C. Hoorn, M. Konert; Tibetan uplift prior to the Eocene-Oligocene climate transition: Evidence from pollen analysis of the Xining Basin. Geology 2008;; 36 (12): 987–990. doi: https://doi.org/10.1130/G25063A.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 Uplift of the Tibetan Plateau and the Himalayas since the onset of the Indo-Asia collision is held responsible for Asian aridification and monsoon intensification, but may also have gradually cooled global climate, leading to the 34 Ma Eocene-Oligocene transition. To unravel the interplay between Tibetan uplift and global climate, proxy records of Asian paleoenvironments constrained by accurate age models are needed for the Paleogene Period. Here we report the 38 Ma appearance of high-altitude vegetation recovered from palynological assemblages in precisely dated lacustrine sediments from the Xining Basin of the northeastern Tibetan Plateau region. This result confirms previous evidence for important regional uplift in the central and northern Tibetan Plateau regions during the early stage of the Indo-Asia collision. This is consistent with the idea that the associated increase in rock weathering and erosion contributed to lowering of atmospheric CO2, leading to the Eocene-Oligocene transition. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.