Buczkowski, D.L.

Jaumann, Ralf

Krohn, Katrin

Mest, S.

Otto, K.

Schulzeck, F.

Scully, J.E.C.

von der Gathen, Isabel

Williams, D.A.

Institute of Transport Research:Publications

Start |Author Index | View Uploaded Presentations | Meeting Information2015 GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)Paper No. 282-7Presentation Time: 9:35 AMPRELIMINARY INVESTIGATION OF POLYGONAL CRATERS ON (1) CERESOTTO, Katharina A.1, JAUMANN, Ralf1, KROHN, Katrin1, BUCZKOWSKI, Debra L.2, VON DER GATHEN, Isabel3, MEST, Scott C.4,SCHULZECK, Franziska3, SCULLY, Jennifer E.C.5 and WILLIAMS, David A.6, (1)Institute of Planetary Research, German AerospaceCenter (DLR), Rutherfordstr. 2, Berlin, 12489, Germany, (2)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723,(3)German Aerospace Center (DLR), Institute of Planetary Research, Rutherfordstr. 2, Berlin, 12489, Germany, (4)Planetary ScienceInstitute, Tucson, AZ 85719, (5)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, (6)School of Earthand Space Exploration, Arizona State University, Tempe, AZ 85287, katharina.otto@dlr.deThe Dawn space craft arrived at dwarf planet Ceres in March 2015 [1]. The on-board Framing Camera (FC) collected image datawhich revealed a large variety of impact crater morphologies including polygonal craters. Polygonal craters show straight rim sectionsaligned to form an angular shape. They are commonly associated with fractures in the target material [2]. Polygonal craters are knownfrom a variety of planetary bodies such as icy satellites [3].We use a mosaic composed of FC images to interpret the distribution and geologic setting of polygonal craters on Ceres.We find polygonal craters with a size of up to 250 km in diameter. A preferential hexagonal shape is observed. Some polygonal cratersexhibit central peaks or relaxed crater floors, while other polygonal craters are simple bowl-shaped. Polygonal craters show bothrelatively distinct and degraded crater rims indicating a continuous formation period. Areas showing a higher density of polygonalcraters are evident in the higher latitudes. In the eastern hemisphere, polygonal craters are associated with a set of regional linearstructures. The crater rims tend to align with these structures.We will analyze polygonal crater density, orientation and morphology with respect to Ceres’ geology and thus aim to infer structuralinformation on geologic units. Assuming that polygonal craters are caused by fractures in the impacted material, structural regolithvariations as well as tectonics of surface units will be discussed and related to Ceres’ evolution.[1] Russell, C. T. et al., 46th LPSC, #1131, 2015. [2] Öhman, T. et al., GSA Special Paper 465, pp. 51-65, 2010. [3] Beddingfield, C. B.et al., 46th LPSC, #1159, 2015.Supported by E. Kersten, K.-D. Matz, A. Naß, F. Preusker, T. Roatsch, S. Schröder, K. Stephan, R. Wagner, C. A. Raymond and C. T.Russell.Session No. 282T172. Geology of Dwarf Planets: First Results from NASA's Dawn Mission to CeresWednesday, 4 November 2015: 8:00 AM-12:00 PMRoom 344 (Baltimore Convention Center)Geological Society of America Abstracts with Programs. Vol. 47, No. 7, p.709© Copyright 2015 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract toreproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy ofthis electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use,providing all  reproductions include the complete content  shown here,  including the author  information.  All  other  forms of  reproduction and/ortransmittal are prohibited without written permission from GSA Copyright Permissions.Back to: T172. Geology of Dwarf Planets: First Results from NASA's Dawn Mission to Ceres<< Previous Abstract | Next Abstract >>Abstract: <SPAN>PRELIMINARY INVESTIGATION OF POLYG... https://gsa.confex.com/gsa/2015AM/webprogram/Paper267889.html1 von 1 17.12.2015 12:22

Preliminary Investigation of Polygonal Craters on (1) Ceres

Preliminary Investigation of Polygonal Craters on (1) Ceres

Abstract

Similar works

Full text

Available Versions

Institute of Transport Research:Publications