Title

Variations in the onset diameter for Martian layered ejecta morphologies and their implications for subsurface volatile reservoirs

Authors

Authors

N. G. Barlow; J. Koroshetz;J. M. Dohm

Abbreviated Journal Title

Geophys. Res. Lett.

Keywords

MARS; Geosciences, Multidisciplinary

Abstract

We investigated regional variations in the onset diameter of craters displaying a single layer ejecta morphology within +/- 30 degrees latitude using Viking imagery. Our results generally agree with those of previous studies which show onset diameters of 5 to 6 km in the equatorial region, but we have identified localized regions with unusually small onset diameters. The largest region is located in Solis and Thaumasia Planae. The 3-5 km onset diameter range in this area indicates a near-surface ice-rich reservoir (depth similar to 110 m). This unusual concentration of near-surface ice may have resulted from magmatic-driven uplifts associated with the Tharsis rise, which modified parts of a regional aquifer/drainage basin system and resulted in the transfer and concentration of subsurface volatiles in this region.

Journal Title

Geophysical Research Letters

Volume

28

Issue/Number

16

Publication Date

1-1-2001

Document Type

Article

Language

English

First Page

3095

Last Page

3098

WOS Identifier

WOS:000170348100009

ISSN

0094-8276

Share

COinS