Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p11a0946b&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #P11A-0946
Physics
8010 Fractures And Faults, 5475 Tectonics (8149), 6225 Mars
Scientific paper
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.
Baioni Davide
Borraccini F.
Lanci Luca
Wezel Forese Carlo
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