Skip Nav Destination
GEOREF RECORD
Global geologic context for rock types and surface alteration on Mars
Michael B. Wyatt, Harry Y. McSween, Kenneth L. Tanaka and James W. Head
Global geologic context for rock types and surface alteration on Mars
Geology (Boulder) (August 2004) 32 (8): 645-648
Global geologic context for rock types and surface alteration on Mars
Geology (Boulder) (August 2004) 32 (8): 645-648
Index Terms/Descriptors
Abstract
Petrologic interpretations of thermal emission spectra from Mars orbiting spacecraft indicate the widespread occurrence of surfaces having basaltic and either andesitic or partly altered basalt compositions. Global concentration of ice-rich mantle deposits and near-surface ice at middle to high latitudes and their spatial correlation with andesitic or partly altered basalt materials favor the alteration hypothesis. We propose the formation of these units through limited chemical weathering from basalt interactions with icy mantles deposited during periods of high obliquity. Alteration of sediments in the northern lowlands depocenter may have been enhanced by temporary standing bodies of water and ice.
ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 32
Serial Issue: 8
Title: Global geologic context for rock types and surface alteration on Mars
Affiliation: Arizona State University, Department of Geological Sciences,
Tempe, AZ,
United States
Pages: 645-648
Published: 200408
Text Language: English
Publisher: Geological Society of America (GSA),
Boulder, CO,
United States
References: 30
DOI:
10.1130/G20527.1
Accession Number: 2004-066104
Categories: Extraterrestrial geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sketch maps
Secondary Affiliation: University of Tennessee,
USA,
United StatesU. S. Geological Survey,
USA,
United StatesBrown University,
USA,
United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200419
Program Name: USGSOPNon-USGS publications with USGS authors