eprintid: 1477316
rev_number: 28
eprint_status: archive
userid: 608
dir: disk0/01/47/73/16
datestamp: 2016-05-27 14:42:51
lastmod: 2021-09-19 23:51:40
status_changed: 2016-05-27 14:42:51
type: article
metadata_visibility: show
creators_name: Davila, FM
creators_name: Lithgow-Bertelloni, C
title: Dynamic uplift during slab flattening
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F57
keywords: flat subduction, dynamic topography, Andes
note: Copyright © 2015. This manuscript version is published under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International licence (CC BY-NC-ND 4.0). This licence allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licences are available at http://creativecommons.org/licenses/by/4.0.
abstract: Subduction exerts a strong control on surface topography and is the main cause of large vertical motions in continents, including past events of large-scale marine flooding and tilting. The mechanism is dynamic deflection: the sinking of dense subducted lithosphere gives rise to stresses that directly pull down the surface. Here we show that subduction does not always lead to downward deflections of the Earth's surface. Subduction of young lithosphere at shallow angles (flat subduction) leaves it neutrally or even positively buoyant with respect to underlying mantle because the lithosphere is relatively warm compared with older lithosphere, and because the thickened and hence drier oceanic crust does not undergo the transformation of basalt to denser eclogite. Accounting for neutrally buoyant flat segments along with large variations in slab morphology in the South American subduction zone explains along-strike and temporal changes in dynamic topography observed in the geologic record since the beginning of the Cenozoic. Our results show that the transition from normal subduction to slab flattening generates dynamic uplift, preventing back-arc marine flooding.
date: 2015-09-01
date_type: published
official_url: http://dx.doi.org/10.1016/j.epsl.2015.05.026
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1053510
doi: 10.1016/j.epsl.2015.05.026
lyricists_name: Lithgow-Bertelloni, Carolina
lyricists_id: CLITH46
actors_name: Lithgow-Bertelloni, Carolina
actors_id: CLITH46
actors_role: owner
full_text_status: public
publication: Earth and Planetary Science Letters
volume: 425
pagerange: 34-43
issn: 0012-821X
citation:        Davila, FM;    Lithgow-Bertelloni, C;      (2015)    Dynamic uplift during slab flattening.                   Earth and Planetary Science Letters , 425    pp. 34-43.    10.1016/j.epsl.2015.05.026 <https://doi.org/10.1016/j.epsl.2015.05.026>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1477316/3/Lithgow-Bertelloni_Davila%26Lithgow-Bertelloni_Revised_CLB.pdf