File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Miocene Subsidence and Surface Uplift of Southernmost Tibet Induced by Indian Subduction Dynamics

TitleMiocene Subsidence and Surface Uplift of Southernmost Tibet Induced by Indian Subduction Dynamics
Authors
Keywordsdynamic topography
Tibetan Plateau
Kailas basin
thermochronology
surface uplift
Issue Date2020
PublisherAmerican Geophysical Union. The Journal's web site is located at http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/(ISSN)1525-2027/
Citation
Geochemistry, Geophysics, Geosystems, 2020, v. 21 n. 10, p. article no. e2020GC009078 How to Cite?
AbstractThe Indus ‐ Yarlung suture of southernmost Tibet marks the initial collisional zone, the ongoing India ‐ Asia collision, and yet more than ~30 million years after the onset of collision, a thick detrital sedimentary unit was deposited just north of the suture: the Kailas Formation. The mechanism permitting subsidence of the deep intracontinental Kailas basin in a compressional tectonic regime remains uncertain. We present new apatite (16 – 11 Ma) and zircon (24 – 19 Ma) fi ssion track (AFT and ZFT) ages from the Gangdese batholith just north of the Kailas basin. ZFT analysis of modern ‐ river sand from the northern Gangdese magmatic arc indicates an exhumation at 27.3 ± 1.3 Ma. Thermal modeling indicates that the batholith experienced reheating between 28 and 20 Ma, coeval with deposition in the Kailas basin (between 26 and 21 Ma), followed by overall rapid cooling between 20 and 17 Ma. We interpret this thermal history as a phase of regional Oligocene ‐ Miocene sedimentary burial followed by exhumation. By modeling mantle dynamics in the geodynamic framework of the India ‐ Asia collision, we show that transient dynamic topography over the relative southward folding of the Indian slab is consistent with burial and exhumation of the Gangdese magmatic arc during Oligocene ‐ Miocene time. The northward migration of the Indian continent relative to its own stationary slab created a wave of dynamic topography that caused subsidence in the overriding plate north of the Himalaya, followed by a phase of surface uplift since ~27 Ma of the northern Gangdese magmatic arc. During latest Oligocene ‐ early Miocene time, the dynamic de fl ection center was in the Kailas area, and it progressively relocated southward to its present position at the Ganges basin.
Persistent Identifierhttp://hdl.handle.net/10722/290899
ISSN
2023 Impact Factor: 2.9
2023 SCImago Journal Rankings: 1.457
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShen, T-
dc.contributor.authorWang, G-
dc.contributor.authorReplumaz, A-
dc.contributor.authorHusson, L-
dc.contributor.authorWebb, AAG-
dc.contributor.authorBernet, M-
dc.contributor.authorLeloup, PH-
dc.contributor.authorZhang, P-
dc.contributor.authorMahéo, G-
dc.contributor.authorZhang, K-
dc.date.accessioned2020-11-02T05:48:40Z-
dc.date.available2020-11-02T05:48:40Z-
dc.date.issued2020-
dc.identifier.citationGeochemistry, Geophysics, Geosystems, 2020, v. 21 n. 10, p. article no. e2020GC009078-
dc.identifier.issn1525-2027-
dc.identifier.urihttp://hdl.handle.net/10722/290899-
dc.description.abstractThe Indus ‐ Yarlung suture of southernmost Tibet marks the initial collisional zone, the ongoing India ‐ Asia collision, and yet more than ~30 million years after the onset of collision, a thick detrital sedimentary unit was deposited just north of the suture: the Kailas Formation. The mechanism permitting subsidence of the deep intracontinental Kailas basin in a compressional tectonic regime remains uncertain. We present new apatite (16 – 11 Ma) and zircon (24 – 19 Ma) fi ssion track (AFT and ZFT) ages from the Gangdese batholith just north of the Kailas basin. ZFT analysis of modern ‐ river sand from the northern Gangdese magmatic arc indicates an exhumation at 27.3 ± 1.3 Ma. Thermal modeling indicates that the batholith experienced reheating between 28 and 20 Ma, coeval with deposition in the Kailas basin (between 26 and 21 Ma), followed by overall rapid cooling between 20 and 17 Ma. We interpret this thermal history as a phase of regional Oligocene ‐ Miocene sedimentary burial followed by exhumation. By modeling mantle dynamics in the geodynamic framework of the India ‐ Asia collision, we show that transient dynamic topography over the relative southward folding of the Indian slab is consistent with burial and exhumation of the Gangdese magmatic arc during Oligocene ‐ Miocene time. The northward migration of the Indian continent relative to its own stationary slab created a wave of dynamic topography that caused subsidence in the overriding plate north of the Himalaya, followed by a phase of surface uplift since ~27 Ma of the northern Gangdese magmatic arc. During latest Oligocene ‐ early Miocene time, the dynamic de fl ection center was in the Kailas area, and it progressively relocated southward to its present position at the Ganges basin.-
dc.languageeng-
dc.publisherAmerican Geophysical Union. The Journal's web site is located at http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/(ISSN)1525-2027/-
dc.relation.ispartofGeochemistry, Geophysics, Geosystems-
dc.rightsGeochemistry, Geophysics, Geosystems. Copyright © American Geophysical Union.-
dc.rights©[2020]. American Geophysical Union. All Rights Reserved. This article is available at https://doi.org/10.1029/2020GC009078-
dc.subjectdynamic topography-
dc.subjectTibetan Plateau-
dc.subjectKailas basin-
dc.subjectthermochronology-
dc.subjectsurface uplift-
dc.titleMiocene Subsidence and Surface Uplift of Southernmost Tibet Induced by Indian Subduction Dynamics-
dc.typeArticle-
dc.identifier.emailWebb, AAG: aagwebb@hku.hk-
dc.identifier.authorityWebb, AAG=rp02135-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1029/2020GC009078-
dc.identifier.scopuseid_2-s2.0-85094132665-
dc.identifier.hkuros318495-
dc.identifier.volume21-
dc.identifier.issue10-
dc.identifier.spagearticle no. e2020GC009078-
dc.identifier.epagearticle no. e2020GC009078-
dc.identifier.eissn1525-2027-
dc.identifier.isiWOS:000588351500014-
dc.publisher.placeUnited States-
dc.identifier.issnl1525-2027-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats