Mechanics of lithospheric delamination in extensional settings.

Jex, Jeffrey A., 1988-

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dc.contributor	Dunbar, John A., 1955-
dc.creator	Jex, Jeffrey A., 1988-
dc.date	2015-05-22T15:18:41Z
dc.date	2015-05-22T15:18:41Z
dc.date	2015-05
dc.date	2015-03-23
dc.date	May 2015
dc.date	2015-05-22T15:18:41Z
dc.date.accessioned	2022-05-18T12:28:56Z
dc.date.available	2022-05-18T12:28:56Z
dc.identifier	http://hdl.handle.net/2104/9304
dc.identifier.uri	http://localhost:8080/xmlui/handle/CUHPOERS/31697
dc.description	Delamination, the foundering of the lower crust and sub-crustal lithosphere, is one of the most important geodynamic processes that is still poorly understood. Geodynamic modeling has constrained conditions and likely outcomes of delamination in orogenically-thickened crust. In this study, I do the same for delamination in extensional settings by using finite element models of young passive margins. Delamination in these models may occur as melt beneath oceanic crust intrudes between the lower continental crust and sub-crustal lithosphere, driven by buoyancy. When sufficient melt is available and the lower crust is weak, the melt wedges between the lower crust and sub-crustal lithosphere, initiating delamination of the sub-crustal lithosphere. The speed of delamination is strongly dependent on weakness of the lower crust followed by the amount of melt present.
dc.format	application/pdf
dc.format	application/pdf
dc.format	application/pdf
dc.language	en
dc.rights	Worldwide access.
dc.subject	Delamination
dc.subject	Geodynamics
dc.subject	Geophysics
dc.subject	Geology
dc.subject	Plate tectonics
dc.subject	Rifting
dc.subject	Passive margin
dc.subject	Volcanic margin
dc.subject	Numerical modeling
dc.subject	Finite element
dc.subject	Underplating
dc.title	Mechanics of lithospheric delamination in extensional settings.
dc.type	Thesis
dc.type	text