dc.date.accessioned | 2018-08-18T11:00:16Z | |
dc.date.available | 2018-08-18T11:00:16Z | |
dc.date.created | 2018-01-18T14:03:53Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Crameri, Fabio Lithgow-Bertelloni, Carolina . Abrupt upper-plate tilting during slab-transition-zone collision. Tectonophysics. 2017 | |
dc.identifier.uri | http://hdl.handle.net/10852/63178 | |
dc.description.abstract | The sinking remnant of a surface plate crosses and interacts with multiple boundaries in Earth's interior. Here, we specifically investigate the prominent dynamic interaction of the sinking plate portion with the upper-mantle transition zone and its corresponding surface elevation signal. We unravel, for the first time, that the collision of the sinking slab with the transition zone induces a sudden, dramatic downward tilt of the upper plate towards the subduction trench. Unraveling this crucial interaction was only possible thanks to state-of-the-art numerical modelling and post-processing. The new model that is introduced here to study the dynamically self-consistent temporal evolution of subduction features accurate subduction-zone topography, robust single-sided plate sinking, stronger plates close to laboratory values, an upper-mantle phase transition, and simple continents at a free surface. To distinguish the impact of the new physical model features, three different setups are used: the simplest model setup includes a basic high-viscosity lower mantle, the second adds a 660-km phase transition, and the third includes, additionally, a continental upper plate. Common to all models is the clear topographic signal upon slab-transition-zone interaction: the upper plate tilts abruptly towards the subduction trench by about 0.05° and over around 10 Ma. This dramatic increase in upper-plate tilt can be related to the slab-induced excitation of the high-viscosity lower mantle, which introduces a wider flow pattern. A large change in horizontal extent of inundation of up to 900 km is observed as a direct consequence of the upper-plate tilting. Such an abrupt variation in surface topography and inundation extent should be clearly visible in temporal records of large-scale surface elevation and might explain continental tilting as observed in Australia since the Eocene and North America during the Phanerozoic. | |
dc.language | EN | |
dc.title | Abrupt upper-plate tilting during slab-transition-zone collision | |
dc.type | Journal article | |
dc.creator.author | Crameri, Fabio | |
dc.creator.author | Lithgow-Bertelloni, Carolina | |
cristin.unitcode | 185,15,22,40 | |
cristin.unitname | Senter for Jordens utvikling og dynamikk | |
cristin.ispublished | false | |
cristin.fulltext | preprint | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1546405 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonophysics&rft.volume=&rft.spage=&rft.date=2017 | |
dc.identifier.jtitle | Tectonophysics | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.tecto.2017.09.013 | |
dc.identifier.urn | URN:NBN:no-65739 | |
dc.type.document | Tidsskriftartikkel | |
dc.source.issn | 0040-1951 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/63178/1/Crameri%2526Lithgow-Bertelloni2017_accepted.pdf | |
dc.type.version | SubmittedVersion | |
dc.relation.project | NOTUR/NORSTORE/NN9283K | |
dc.relation.project | NOTUR/NORSTORE/NS9029K | |
dc.relation.project | NFR/223272 | |