HR: 0800h
AN: P11A-0946    [Abstracts]
TI: Tectonic Extension and Bulging in Southern Alba Patera Region, Mars
AU: Baioni, D
EM: dvbgeo@libero.it
AF: Faculty of Environmental Sciences - University of Urbino, Campus Scientifico , Urbino, PU 61029 Italy
AU: * Borraccini, F
EM: borraccini@uniurb.it
AF: Faculty of Environmental Sciences - University of Urbino, Campus Scientifico , Urbino, PU 61029 Italy
AU: Lanci, L
EM: llanci@uniurb.it
AF: Faculty of Environmental Sciences - University of Urbino, Campus Scientifico , Urbino, PU 61029 Italy
AU: Wezel, F C
EM: wezel@uniurb.it
AF: Faculty of Environmental Sciences - University of Urbino, Campus Scientifico , Urbino, PU 61029 Italy
AB: We investigated the Alba Patera area, south of the Alba Patera Volcano, in order to obtain quantitative information on the tectonic extension affecting this area. Tectonic structures of Alba Patera area have been previously described using Viking images and interpreted as extensional structures. Digital Elevation Model made using altimetry data (MOLA) can be used to quantitatively investigate these structures with a better resolution. We proceeded by constructing E-W oriented profiles and used techniques commonly employed in Structural Geology to estimate the tectonic extension. We investigated the presence of mechanical discontinuities by calculating the maximum depths reached by the graben structures. This has been estimated using the lost-area balancing method (Groshong, 1996) and the crossing depth of the border faults assuming planar fault surfaces, which gave similar results. The extension calculated in the studied area (up to 12%) cannot be explained only with the observed doming of the topographic surface and require a significant amount of horizontal stretching.
DE: 8010 Fractures and faults
DE: 5475 Tectonics (8149)
DE: 6225 Mars
SC: Planetary Sciences [P]
MN: 2004 AGU Fall Meeting