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Fracture geometry and statistics of Ceres’ floor fractures

Krohn, Katrin and von der Gathen, Isabel and Buczkoswki, D.L. and Jaumann, Ralf and Wickhusen, Kai and Schulzeck, Franziska and Stephan, Katrin and Wagner, Roland and Scully, Jennifer E.C. and Raymond, C. A. and Russell, Christopher T. (2020) Fracture geometry and statistics of Ceres’ floor fractures. Planetary and Space Science, 187 (104955). Elsevier. doi: 10.1016/j.pss.2020.104955. ISSN 0032-0633.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0032063318300710?via%3Dihub

Abstract

Floor-fractured craters are one of the most distinct features on Ceres. Most of the fractures are located on the crater floors. The floor-fractures are concentric, radial or polygonal and share similarities with the floor-fractured craters (FCC) of Class 1 and 4 on the Moon (e.g., Buczkowski et al., 2018; Schultz, 1976) In total we measured 2336 fractures in thirteen craters. We analyzed their width, length, orientation and density. Floor-fractures on Ceres do not show a global uniform sense of orientation. Nevertheless, two or more preferred orientations can be found in nearly every crater. The density map illustrates that there is typically no decrease of fracturing from the crater center to the crater rim and denotes formation mechanisms that are not necessarily impact driven. Because of the variation in these parameters, it is more likely that FFC on Ceres are globally independent and show different formation mechanisms. The geometry of the floor-fractures suggests an inhomogeneous, brittle surface material, in some cases with volatile components. We also propose that the formation mechanisms on Ceres are comparable to those on the Moon and Mars and such mechanisms include cooling/melting processes, degassing, and subsidence of the crater floor by up-doming of subsurface material as a result of absolute tensile stresses.

Item URL in elib:https://elib.dlr.de/138157/
Document Type:Article
Title:Fracture geometry and statistics of Ceres’ floor fractures
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Krohn, Katrinkatrin.krohn (at) dlr.dehttps://orcid.org/0000-0001-8518-4985
von der Gathen, IsabelIsabel.Gathen (at) dlr.deUNSPECIFIED
Buczkoswki, D.L.Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099 USAUNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.dehttps://orcid.org/0000-0002-9759-6597
Wickhusen, KaiKai.Wickhusen (at) dlr.dehttps://orcid.org/0000-0003-2524-5285
Schulzeck, FranziskaFranziska.Schulzeck (at) dlr.deUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Wagner, RolandRoland.Wagner (at) dlr.deUNSPECIFIED
Scully, Jennifer E.C.UCLA, Los Angeles, CA, United States.UNSPECIFIED
Raymond, C. A.Carol.A.Raymond (at) jpl.nasa.govUNSPECIFIED
Russell, Christopher T.Institute of Geophysics, UCLA, Los Angeles, CA, United States.UNSPECIFIED
Date:2020
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:187
DOI :10.1016/j.pss.2020.104955
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:FFC, crater processes, floor-fractures, volatile components
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Institute of Planetary Research > Planetary Geodesy
Deposited By: Krohn, Dr.rer.nat Katrin
Deposited On:25 Nov 2020 10:20
Last Modified:25 Nov 2020 10:20

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