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Cenozoic exhumation and deformation of northeastern Tibet and the Qinling: Is Tibetan lower crustal flow diverging around the Sichuan Basin?

2006; Geological Society of America; Volume: 118; Issue: 5-6 Linguagem: Inglês

10.1130/b25805.1

1943-2674

Eva Enkelmann, Lothar Ratschbacher, Raymond Jonckheere, Robert Nestler, M. Fleischer, Richard Gloaguen, B. Hacker, Yongqian Zhang, Yongsheng Ma,

High-pressure geophysics and materials

Research Article| May 01, 2006 Cenozoic exhumation and deformation of northeastern Tibet and the Qinling: Is Tibetan lower crustal flow diverging around the Sichuan Basin? Eva Enkelmann; Eva Enkelmann 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Lothar Ratschbacher; Lothar Ratschbacher 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Raymond Jonckheere; Raymond Jonckheere 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Ralf Nestler; Ralf Nestler 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Manja Fleischer; Manja Fleischer 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Richard Gloaguen; Richard Gloaguen 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Search for other works by this author on: GSW Google Scholar Bradley R. Hacker; Bradley R. Hacker 2Geological Sciences, University of California, Santa Barbara, California 93160, USA Search for other works by this author on: GSW Google Scholar Yue Qiao Zhang; Yue Qiao Zhang 3Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, People's Republic of China Search for other works by this author on: GSW Google Scholar Yin-Sheng Ma Yin-Sheng Ma 3Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, People's Republic of China Search for other works by this author on: GSW Google Scholar Author and Article Information Eva Enkelmann 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Lothar Ratschbacher 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Raymond Jonckheere 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Ralf Nestler 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Manja Fleischer 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Richard Gloaguen 1Geowissenschaften, Technische Universität Bergakademie, D-09599 Freiberg, Germany Bradley R. Hacker 2Geological Sciences, University of California, Santa Barbara, California 93160, USA Yue Qiao Zhang 3Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, People's Republic of China Yin-Sheng Ma 3Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, People's Republic of China Publisher: Geological Society of America Received: 09 Feb 2005 Revision Received: 03 Jan 2006 Accepted: 05 Feb 2006 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2006) 118 (5-6): 651–671. https://doi.org/10.1130/B25805.1 Article history Received: 09 Feb 2005 Revision Received: 03 Jan 2006 Accepted: 05 Feb 2006 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Eva Enkelmann, Lothar Ratschbacher, Raymond Jonckheere, Ralf Nestler, Manja Fleischer, Richard Gloaguen, Bradley R. Hacker, Yue Qiao Zhang, Yin-Sheng Ma; Cenozoic exhumation and deformation of northeastern Tibet and the Qinling: Is Tibetan lower crustal flow diverging around the Sichuan Basin?. GSA Bulletin 2006;; 118 (5-6): 651–671. doi: https://doi.org/10.1130/B25805.1 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 SocietyGSA Bulletin Search Advanced Search Abstract Apatite fission-track thermochronology data elucidate the cooling/exhumation history of the Qinling (Qin Mountains), which contain a Paleozoic−Mesozoic orogenic collage north of the Sichuan Basin and northeast of the Tibetan Plateau. In particular, we examine the extent to which the Qinling were affected by the rising plateau. The northern and eastern Qinling show continuous cooling and slow exhumation since the Cretaceous. In contrast, in the southwestern Qinling, rapid cooling initiated at 9−4 Ma, a few million years later than in the eastern Tibetan Plateau. A compilation of major Cenozoic faults in the eastern Tibetan Plateau and the Qinling, and their kinematic and dynamic characterization, shows that deformation in the Qinling has predominantly been strike slip. Active sinistral and dextral strike-slip faults delineate an area of eastward rock flow and bound the area of rapid late Cenozoic cooling outlined by apatite fission-track thermochronology. These data can be interpreted to indicate that lower crustal flow has been diverted around the Longmen Shan and beneath the southwestern Qinling, causing active plateau uplift in this area. Alternatively, northeastern Tibet may be growing eastward faster in the western Qinling than the entire South China Block is extruding to the east. 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