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dc.contributor.authorWang, Yingpengen_US
dc.date.accessioned2018-02-08T20:57:13Z
dc.date.available2018-02-08T20:57:13Z
dc.date.created2017-12en_US
dc.date.issued2017-12-05en_US
dc.date.submittedDecember 2017en_US
dc.identifier.urihttp://hdl.handle.net/10027/22142
dc.description.abstractCeres’ interior structure has always been a puzzle. The gravity and shape data returned by the Dawn spacecraft show that Ceres is in hydrostatic equilibrium with a mean normalized moment of inertia of 0.37, which suggests that Ceres is at least partially differentiated [Park et al., 2016]. This gravity data was interpreted as a two-layer interior structure, with a rocky core overlaid by a volatile-rich shell. Kerwan is the largest recognized basin on Ceres, and it is also the most likely crater to have experienced topographic relaxation given its size and location (close to equator). I simulated the viscoelastic relaxation of Ceres' large basins by using finite element method, the peculiar morphology of Kerwan (and by extension Yalode) can be achieved by relaxation in a thin, dense, and high-viscosity crust layer ~25 km thick, over a lower density, softer mantle ~75 km thick. The predominance of deep craters on Ceres tells us its near-surface is not composed of ice-dominated material. Therefore, I propose a three-layer structure with a dense core, surrounded by a high viscosity icy-dirt crust on top of a relatively less dense dirty-ice mantle. It can preserve not only topography of smaller impact craters but also produce the peculiar morphology of the largest craters. Furthermore, this structure sets conditions for mantle overturn, which may drive late stage cryovolcanic activity on Ceres.en_US
dc.format.mimetypeapplication/pdfen_US
dc.subjectCeresen_US
dc.subjectCrateren_US
dc.subjectKerwanen_US
dc.subjectRelaxationen_US
dc.subjectIceen_US
dc.subjectViscosityen_US
dc.subjectTopographyen_US
dc.subjectCrusten_US
dc.subjectMantleen_US
dc.subjectInterior Structureen_US
dc.subjectCrust-mantle boundaryen_US
dc.titleInvestigating Ceres' Interior Structure by Simulating Relaxation of Large Basinen_US
dc.typeThesisen_US
thesis.degree.departmentEarth and Environmental Sciencesen_US
thesis.degree.grantorUniversity of Illinois at Chicagoen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMS, Master of Scienceen_US
dc.contributor.committeeMemberDombard, Andrewen_US
dc.contributor.committeeMemberMeyer-Dombard, D'Arcyen_US
dc.contributor.committeeMemberSit, Stefanyen_US
dc.type.materialtexten_US


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