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Normal Faults on Ceres: Insights Into the Mechanical Properties and Thermal History of Nar Sulcus

Hughson, K.H.G. and Russell, C.T. and Schmidt, B.E. and Travis, B. and Preusker, Frank and Neesemann, A. and Sizemore, H. G. and Schenk, P.M. and Buczkoswki, D.L. and Castillo-Rogez, J.C. and Raymond, C.A. (2019) Normal Faults on Ceres: Insights Into the Mechanical Properties and Thermal History of Nar Sulcus. Geophysical Research Letters, 46 (1), pp. 80-88. Wiley. DOI: 10.1029/2018GL080258 ISSN 0094-8276

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL080258

Abstract

We characterized two sets of extensional faults that comprise the Nar Sulcus region of Ceres by applying a cantilever model for fault related flexure and derived flexural rigidity values for Nar Sulcus between 2.0 · 10E15 and 1.8 · 10E16 N·m. This range of flexural rigidity makes Nar Sulcus mechanically akin to extensional structures on Ganymede, Europa, and Enceladus. We combine these observations with an inferred strength profile for the upper mechanical layer of Ceres and estimate its thickness to be 2.9–9.5 km. Surface heat fluxes at Nar Sulcus during its formation were likely ≥10 mW/m2 for estimated strain rates of 10E−17–10E−14 sE−1, which is at least one order of magnitude larger than the current estimated global average. For geologically plausible heat fluxes between 10 and 100 mW/m2, we estimate an upper bound of ~30 vol.% mechanically silicate‐like phases in the near surface at Nar Sulcus, neglecting the effects of porosity.

Item URL in elib:https://elib.dlr.de/131263/
Document Type:Article
Title:Normal Faults on Ceres: Insights Into the Mechanical Properties and Thermal History of Nar Sulcus
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hughson, K.H.G.UCLA, Los Angeles, CA, USA,UNSPECIFIED
Russell, C.T.University of California, Los Angeles, CA 90095-1567, USAUNSPECIFIED
Schmidt, B.E.Georgia Institute of Technology Main CampusUNSPECIFIED
Travis, B.Planetary Science InstituteUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Neesemann, A.Free University of Berlin, Berlin, GermanyUNSPECIFIED
Sizemore, H. G.planetary science instituteUNSPECIFIED
Schenk, P.M.LPI, Houston, TXUNSPECIFIED
Buczkoswki, D.L.Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099 USAUNSPECIFIED
Castillo-Rogez, J.C.jet propulsion laboratory, california institute of technology,UNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, Pasadena, CA 91109UNSPECIFIED
Date:16 January 2019
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:46
DOI :10.1029/2018GL080258
Page Range:pp. 80-88
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Dawn, Ceres, extension, faulting, elastic thickness, heat flux
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Scholten, Dipl.-Ing. Frank
Deposited On:28 Nov 2019 09:09
Last Modified:20 Mar 2020 11:28

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