CaltechAUTHORS
  A Caltech Library Service

Relative age of interior layered deposits in southwest Candor Chasma based on high-resolution structural mapping

Okubo, Chris H. and Lewis, Kevin W. and McEwen, Alfred S. and Kirk, Randolph L. (2008) Relative age of interior layered deposits in southwest Candor Chasma based on high-resolution structural mapping. Journal of Geophysical Research E, 113 (E12). E12002. ISSN 0148-0227. https://resolver.caltech.edu/CaltechAUTHORS:OKUjgre08

[img]
Preview
PDF - Published Version
See Usage Policy.

3137Kb
[img] Postscript (Figure S1) - Supplemental Material
See Usage Policy.

2352Kb
[img] Plain Text (READ ME) - Supplemental Material
See Usage Policy.

1571b

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:OKUjgre08

Abstract

High-resolution topography generated from stereo HiRISE (High-Resolution Imaging Science Experiment) imagery reveals the meter-scale structure of interior layered deposits (ILD) in southwest Candor Chasma. This study seeks to determine the age of the local ILD relative to any normal faults that can be attributed to chasma formation. The study area is located near the contact of these ILD and the wall rock and is in an area where chasma-forming normal faults have been proposed. We find that while normal faults are found in the study area, these faults are not sufficiently large nor appropriately located or oriented to accommodate the roughly northeast-southwest extension that is required for normal faults that can be attributed to chasma formation. Additionally, bedding exposed in the local ILD generally dips toward the center of Candor Chasma, consistent with sediment deposition in a preexisting basin. Further, pit craters of Tithonia Catena, presumed to predate or be contemporaneous with the formation of west Candor Chasma, do not cut into the ILD within the study area. These independent lines of evidence support a postchasma age for the ILD exposed within the study area. Chasma-related normal faults may exist within these ILD at depth but are not exposed at the surface. Approximately 2 km of conformable stratigraphy is exposed in the study area, and therefore at least several kilometers of the local ILD were deposited subsequent to any chasma-related normal faulting that may have occurred in this part of Candor Chasma.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2008JE003181DOIArticle
ORCID:
AuthorORCID
Lewis, Kevin W.0000-0003-3412-803X
Additional Information:Copyright 2008 by the American Geophysical Union. Received 1 May 2008; revised 29 June 2008; accepted 19 August 2008; published 2 December 2008. The authors acknowledge the contributions of the science and operations teams for HiRISE and MRO, without whom this work would not be possible. We thank Frank Fueten and Daniel Mège for comments that helped to improve this paper. This work is supported by a grant from NASA's Mars Data Analysis Program to C. H. Okubo (NNX06AE01G).
Funders:
Funding AgencyGrant Number
NASANNX06AE01G
Subject Keywords:layered deposit, fault, Mars
Issue or Number:E12
Record Number:CaltechAUTHORS:OKUjgre08
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:OKUjgre08
Official Citation:Okubo, C. H., K. W. Lewis, A. S. McEwen, and R. L. Kirk (2008), Relative age of interior layered deposits in southwest Candor Chasma based on high-resolution structural mapping, J. Geophys. Res., 113, E12002, doi:10.1029/2008JE003181.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12849
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:08 Jan 2009 22:06
Last Modified:03 Oct 2019 00:32

Repository Staff Only: item control page