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dc.contributor.authorO’Neill, Craig
Lenardic, Adrian
Weller, Matthew
Moresi, Louis
Quenette, Steve
Zhang, Siqi
dc.date.accessioned 2016-06-22T16:28:31Z
dc.date.available 2016-06-22T16:28:31Z
dc.date.issued 2016
dc.identifier.citation O’Neill, Craig, Lenardic, Adrian, Weller, Matthew, et al.. "A window for plate tectonics in terrestrial planet evolution?." Physics of the Earth and Planetary Interiors, 255, (2016) Elsevier: 80-92. http://dx.doi.org/10.1016/j.pepi.2016.04.002.
dc.identifier.urihttps://hdl.handle.net/1911/90517
dc.description.abstract The tectonic regime of a planet depends critically on the contributions of basal and internal heating to the planetary mantle, and how these evolve through time. We use viscoplastic mantle convection simulations, with evolving core–mantle boundary temperatures, and radiogenic heat decay, to explore how these factors affect tectonic regime over the lifetime of a planet. The simulations demonstrate (i) hot, mantle conditions, coming out of a magma ocean phase of evolution, can produce a “hot” stagnant-lid regime, whilst a cooler post magma ocean mantle may begin in a plate tectonic regime; (ii) planets may evolve from an initial hot stagnant-lid condition, through an episodic regime lasting 1–3 Gyr, into a plate-tectonic regime, and finally into a cold, senescent stagnant lid regime after ∼10 Gyr of evolution, as heat production and basal temperatures wane; and (iii) the thermal state of the post magma ocean mantle, which effectively sets the initial conditions for the sub-solidus mantle convection phase of planetary evolution, is one of the most sensitive parameters affecting planetary evolution – systems with exactly the same physical parameters may exhibit completely different tectonics depending on the initial state employed. Estimates of the early Earth’s temperatures suggest Earth may have begun in a hot stagnant lid mode, evolving into an episodic regime throughout most of the Archaean, before finally passing into a plate tectonic regime. The implication of these results is that, for many cases, plate tectonics may be a phase in planetary evolution between hot and cold stagnant states, rather than an end-member.
dc.language.iso eng
dc.publisher Elsevier
dc.rights This is an open access article under the CC BY-NC-ND license.
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.title A window for plate tectonics in terrestrial planet evolution?
dc.type Journal article
dc.citation.journalTitle Physics of the Earth and Planetary Interiors
dc.citation.volumeNumber 255
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1016/j.pepi.2016.04.002
dc.type.publication publisher version
dc.citation.firstpage 80
dc.citation.lastpage 92


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