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dc.contributor.authorRubey, Michael
dc.contributor.authorBrune, Sascha
dc.contributor.authorHeine, Christian J
dc.contributor.authorDavies, Rhodri D
dc.contributor.authorWilliams, Simon E
dc.contributor.authorMuller, R. Dietmar
dc.date.accessioned2019-08-14
dc.date.available2019-08-14
dc.date.issued2017-09-11
dc.identifier.citationRubey, M., Brune, S., Heine, C., Davies, D. R., Williams, S. E., & Muller, R. D. (2017). Global patterns in Earth’s dynamic topography since the Jurassic: the role of subducted slabs. Solid Earth, 8(5), 899–919. 10.5194/se-8-899-2017en_AU
dc.identifier.issn18699510
dc.identifier.urihttp://hdl.handle.net/2123/20907
dc.description.abstractWe evaluate the spatial and temporal evolution of Earth's long-wavelength surface dynamic topography since the Jurassic using a series of high-resolution global mantle convection models. These models are Earth-like in terms of convective vigour, thermal structure, surface heat-flux and the geographic distribution of heterogeneity. The models generate a degree-2-dominated spectrum of dynamic topography with negative amplitudes above subducted slabs (i.e. circum-Pacific regions and southern Eurasia) and positive amplitudes elsewhere (i.e. Africa, north-western Eurasia and the central Pacific). Model predictions are compared with published observations and subsidence patterns from well data, both globally and for the Australian and southern African regions. We find that our models reproduce the long-wavelength component of these observations, although observed smaller-scale variations are not reproduced. We subsequently define <q>geodynamic rules</q> for how different surface tectonic settings are affected by mantle processes: (i) locations in the vicinity of a subduction zone show large negative dynamic topography amplitudes; (ii) regions far away from convergent margins feature long-term positive dynamic topography; and (iii) rapid variations in dynamic support occur along the margins of overriding plates (e.g. the western US) and at points located on a plate that rapidly approaches a subduction zone (e.g. India and the Arabia Peninsula). Our models provide a predictive quantitative framework linking mantle convection with plate tectonics and sedimentary basin evolution, thus improving our understanding of how subduction and mantle convection affect the spatiooral evolution of basin architecture. © 2017 Author(s).en_AU
dc.description.sponsorshipAcknowledgements. This research was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia and with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government. Sascha Brune was funded by the Marie Curie International Outgoing Fellowship 326115 and the Helmholtz Young Investigators Group CRYSTALS. Christian Heine was supported by ARC Linkage Project LP0989312 with Shell E & P and TOTAL. D. Rhodri Davies is funded by an ARC Future Fellowship (FT140101262) and Simon Williams and R. Dietmar Müller are supported by ARC grants DP130101946 and IH130200012. Leonardo Quevedo is acknowledged for the numerical routines to compute subduction volumes and the implementation of the GPlates TERRA output routines, along with John Cannon. The authors thank the employees of both supercomputing centres for their generous support and Geoscience Australia for their vast, open and easily accessible database. Some figures were generated using the Generic Mapping Tools (GMT; Wessel et al., 2013)en_AU
dc.language.isoen_AUen_AU
dc.publisherEuropean Geosciences Unionen_AU
dc.relationARC-LP0989312, shell-326115, DP130101946,FT140101262,IH130200012en_AU
dc.rights© 2017 Author(s). Creative Commons Attribution License 3.0en_AU
dc.titleGlobal patterns in Earth's dynamic topography since the Jurassic: The role of subducted slabsen_AU
dc.typeArticleen_AU
dc.subject.asrc040402en_AU
dc.identifier.doi10.5194/se-8-899-2017
dc.type.pubtypePublisher versionen_AU


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