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Large fractures (to be differentiated from the small polygonal fracturation)

HRSC mosaic with HRSC nadir & color images. Large fractures (to be differentiated from the small polygonal fracturation) Long/lat: (no particular order) 1-341.05E, 23.84N 2-341.00E, 23.85N 3-340.94E, 23.83N 4-340.91E, 23.92N 5-341.06E, 24.07N 6-340.88E, 24.02N 7-341.31E, 24.12N

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Large fractures (to be differentiated from the small polygonal fracturation)

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  1. HRSC mosaic with HRSC nadir & color images Large fractures (to be differentiated from the small polygonal fracturation) Long/lat: (no particular order) 1-341.05E, 23.84N 2-341.00E, 23.85N 3-340.94E, 23.83N 4-340.91E, 23.92N 5-341.06E, 24.07N 6-340.88E, 24.02N 7-341.31E, 24.12N Rational: Fractures are a particular place for potential fluid circulation. It would be of utmost interest to study the material filling the fractures, for different habitability conditions than the rest of the clay unit. The objective will not be to drive to all of them, but to target the closest to the actual landing site, and possibly some other(s) on the way to other targets. Morphology & mineralogy: Large fractures are present on every red outcrop of the Fe/Mg-clays. However, they are particularly larger and denser in the areas shown here, near the boundary with the upper Al-clays. MSL tasks:At large scale, study the relation of this features to upper and lower layers, the possibility of variations between the center and external parts of the fractures. At small scale, the grain structure, the mineralogy and chemistry of the rocks, in the different levees, and in different parts of the levees. 7 5 6 4 2 3 1

  2. Weseehere the transition from fracture filled by darksand to leveesformed by differentialerosion. 1 km Increase of erosion Inversion of the fracture 1 HiRISE mosaic with HiRISE color images

  3. Weseehereconcentric fractures (onlyexample on the landing site). 5 km 2 HiRISE mosaic

  4. We see here « multi-fractures », fractures that go parallel, very close to each other. 100 m « Multi-fracture » 3 « Multi-fracture » HiRISE mosaic

  5. This area ischaracterised by short, non linear fractures (see close-ups in nextslides) After next slide 4 Next slide HiRISE mosaic with HiRISE color images

  6. Some fractures look similar to dunes. In some cases, it is almost impossible to distinguish (question mark). Some of the dunes are shown by the red arrows, but most of the features in this image are fractures (except in upper right). Most fractures are surrounded by a lighter toned halo that helps to differenciate them from dunes. 200 m dune dune dune ? fracture fracture dune fracture fracture dune fracture fracture fracture fracture dune dune HiRISE mosaic

  7. 100 m HiRISE mosaic

  8. 500 m 5 HiRISE mosaic with HiRISE color images

  9. 200 m 7 This part, on the flank of Mawrth Vallis, have smaller fractures than the othertargeted zones of fractures. HiRISE mosaic with HiRISE color images

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