NASA Mars Odyssey THEMIS Image: Arcuate Fractures in Olympus Mons Caldera

Status Report From: Mars Odyssey THEMIS
Posted: Thursday, March 24, 2005

Medium image for 20050324a
Image Context:
Context image for 20050324a
Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team
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ParameterValue ParameterValue
Latitude1.7   InstrumentVIS
Longitude176.5E (183.5W)   Resolution (m)19
Image Size (pixels)3226x1395   Image Size (km)61.3x26.5

This VIS image was taken at the boundary of Elysium Planitia (to the north) and Lacus Planum (to the south). The southern part of the image is topographically higher than the plains to the north. At this boundary the highland surface is undergoing erosion. Arcuate fractures are seen in the bottom part of the image, some of which are bounding tilted blocks of material. It is possible that a volatile rich subsurface layer has been changed by erosion/exposure, causing the upperlying surface to fracture and collapse.

[Source: ASU THEMIS Science Team]

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image Credit: NASA/JPL/Arizona State University

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