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dc.contributor.authorZhu, Di-Cheng
dc.contributor.authorWang, Qing
dc.contributor.authorCawood, Peter A.
dc.contributor.authorZhao, Zhi-Dan
dc.contributor.authorMo, Xuan-Xue
dc.date.accessioned2017-07-21T23:34:13Z
dc.date.available2017-07-21T23:34:13Z
dc.date.issued2017-01
dc.identifier.citationZhu , D-C , Wang , Q , Cawood , P A , Zhao , Z-D & Mo , X-X 2017 , ' Raising the Gangdese Mountains in southern Tibet ' , Journal of Geophysical Research: Solid Earth , vol. 122 , no. 1 , pp. 214-223 . https://doi.org/10.1002/2016JB013508en
dc.identifier.issn2169-9356
dc.identifier.otherPURE: 248656970
dc.identifier.otherPURE UUID: b88bd4e3-f2ae-4db1-8b82-873db9dfbee8
dc.identifier.otherBibtex: urn:a8875dc16e7876f6276c218710df014d
dc.identifier.otherScopus: 85013231166
dc.identifier.otherWOS: 000395658900012
dc.identifier.urihttp://hdl.handle.net/10023/11262
dc.descriptionThis research was financially supported by the MOST of China (No. 2016YFC0600304 and No. 2016YFC0600407), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB03010301), the National Science Foundation of China (41225006 and 41472061), and the MOST Special Fund from the State Key Laboratory of Geological Processes and Mineral Resources (China University of Geosciences).en
dc.description.abstractThe surface uplift of mountain belts is in large part controlled by the effects of crustal thickening and mantle dynamic processes (e.g., lithospheric delamination or slab breakoff). Understanding the history and driving mechanism of uplift of the southern Tibetan Plateau requires accurate knowledge on crustal thickening over time. Here we determine spatial and temporal variations in crustal thickness using whole-rock La/Yb ratios of intermediate intrusive rocks from the Gangdese arc. Our results show that the crust was likely of normal thickness prior to ca. 70 Ma (~37 km) but began to thicken locally at ca. 70 − 60 Ma. The crust reached (58 − 50) ± 10 km at 55 − 45 Ma extending over 400 km along the strike of the arc. This thickening was likely due to magmatic underplating as a consequence of rollback and then breakoff of the subducting Neo-Tethyan slab. The crust attained a thickness of 68 ± 12 km at ca. 20 − 10 Ma, as a consequence of underthrusting of India and associated thrust faulting. The Gangdese Mountains in southern Tibet broadly attained an elevation of >4000 m at ca. 55 − 45 Ma as a result of isostatic surface uplift driven by crustal thickening and slab breakoff, and reached their present-day elevation by 20 − 10 Ma. Our paleoelevation estimates are consistent not only with the C − O isotope-based paleoaltimetry but also with the carbonate clumped isotope paleothermometer, exemplifying the promise of reconstructing paleoelevation in time and space for ancient orogens through a combination of magmatic composition and Airy isostatic compensation.
dc.language.isoeng
dc.relation.ispartofJournal of Geophysical Research: Solid Earthen
dc.rights© 2016, American Geophysical Union. All Rights Reserved. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://doi.org/10.1002/2016JB013508en
dc.subjectCrustal thicknessen
dc.subjectGangdese Batholithen
dc.subjectPaleoelevationen
dc.subjectDriving mechanism of upliften
dc.subjectSouthern Tibeten
dc.subjectGE Environmental Sciencesen
dc.subjectDASen
dc.subject.lccGEen
dc.titleRaising the Gangdese Mountains in southern Tibeten
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.School of Geography and Geosciencesen
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.St Andrews Isotope Geochemistryen
dc.identifier.doihttps://doi.org/10.1002/2016JB013508
dc.description.statusPeer revieweden
dc.date.embargoedUntil2017-07-21


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