Morphology and evolution of the ejecta of Hale crater in Argyre basin, Mars: Results from high resolution mapping

Elmaarry, Mohamed Ramy; Dohm, J.M.; Michael, G.; Thomas, Nicolas; Maruyama, S. (2013). Morphology and evolution of the ejecta of Hale crater in Argyre basin, Mars: Results from high resolution mapping. Icarus, 226(1), pp. 905-922. Elsevier 10.1016/j.icarus.2013.07.014

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We use various data sets, including images from the High Resolution Imaging Science Experiment camera (HiRISE), to examine the ejecta of the generally fresh-looking Hale crater that occurs in the rugged mountain terrain of Nereidum Montes in the northern rim materials of the Argyre impact structure on Mars. Our investigation reveals that the distal parts of the Hale crater ejecta and other basin deposits behave like viscous flows, which we attribute to the secondary flow of ejecta mixed with water–ice-rich basin materials. Consistent with water-enrichment of the basin materials, our mapping further reveals occasionally deformed surfaces, including highly conspicuous features such as mounds and fractured plateaus that we interpret to be a result of periglacial modification, subsequent (including possibly present-day) to the transient localized melting and fluvial erosion caused by Hale-impact-generated heating. In particular, our morphometric analysis of a well-defined valley system west of Hale crater suggests that it may have been formed through hydrologic/glacial activity prior to the Hale impact, with additional modification resulting from the impact and subsequent geologic and hydrologic phenomena including glacial and periglacial activity.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Elmaarry, Mohamed Ramy and Thomas, Nicolas

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

0019-1035

Publisher:

Elsevier

Language:

English

Submitter:

Cléa Serpollier

Date Deposited:

13 Aug 2014 12:20

Last Modified:

08 Oct 2015 09:29

Publisher DOI:

10.1016/j.icarus.2013.07.014

BORIS DOI:

10.7892/boris.45652

URI:

https://boris.unibe.ch/id/eprint/45652

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