Increasing Nd isotopic ratio of Asian dust indicates progressive uplift of the north Tibetan Plateau since the middle Miocene

Abstract

Research Article| March 01, 2011 Increasing Nd isotopic ratio of Asian dust indicates progressive uplift of the north Tibetan Plateau since the middle Miocene Gaojun Li; Gaojun Li * 1State Laboratory of Mineral Deposits Research, Institute of Surficial Geochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210093, China2Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK *E-mail: ligaojun@nju.edu.cn; chenjun@nju.edu.cn. Search for other works by this author on: GSW Google Scholar Thomas Pettke; Thomas Pettke 3Institute of Geological Sciences, University of Bern, Baltzerstrasse 1+3, CH-3012 Bern, Switzerland Search for other works by this author on: GSW Google Scholar Jun Chen Jun Chen * 1State Laboratory of Mineral Deposits Research, Institute of Surficial Geochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210093, China *E-mail: ligaojun@nju.edu.cn; chenjun@nju.edu.cn. Search for other works by this author on: GSW Google Scholar Author and Article Information Gaojun Li * 1State Laboratory of Mineral Deposits Research, Institute of Surficial Geochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210093, China2Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Thomas Pettke 3Institute of Geological Sciences, University of Bern, Baltzerstrasse 1+3, CH-3012 Bern, Switzerland Jun Chen * 1State Laboratory of Mineral Deposits Research, Institute of Surficial Geochemistry, Department of Earth Sciences, Nanjing University, Nanjing 210093, China *E-mail: ligaojun@nju.edu.cn; chenjun@nju.edu.cn. Publisher: Geological Society of America Received: 08 Sep 2010 Revision Received: 29 Sep 2010 Accepted: 05 Oct 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (3): 199–202. https://doi.org/10.1130/G31734.1 Article history Received: 08 Sep 2010 Revision Received: 29 Sep 2010 Accepted: 05 Oct 2010 First Online: 09 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 Gaojun Li, Thomas Pettke, Jun Chen; Increasing Nd isotopic ratio of Asian dust indicates progressive uplift of the north Tibetan Plateau since the middle Miocene. Geology 2011;; 39 (3): 199–202. doi: https://doi.org/10.1130/G31734.1 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 The time and rate of Tibetan uplift is critical in understanding both the geodynamics of plateau growth and the influence of mountain building on climate change. Models predict that the uplift of the north Tibetan Plateau (NTP) occurred later than uplift of the south and central Tibetan Plateau; uplift of the NTP is believed to have initiated the aridity in the interior of Asia, and to have critically affected the evolution of Asian monsoon and, ultimately, global climate. The history of NTP uplift has remained uncertain, however; scenarios range from Early Miocene to the past million years. This work provides new evidence by relating the Nd isotopic evolution of Asian dust to NTP uplift. The sources of the Asian dust are located in the arid lands between the NTP and the Central Asia orogen. Mass balance calculations indicate that the decreasing εNd values, from −8.2 to −10.4 for Pacific dust since 15 Ma, reflects increasing relative contribution of NTP materials (40% to 70%) to the dust source. As paleoelevation in the Central Asia orogen has largely remained constant, the increasing relative NTP detritus contribution is interpreted to reflect the progressive surface uplift of the NTP at a rate of at least 0.12 mm yr−1 since 15 Ma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.