Author(s)

Déthié Sarr, Meissa Fall, Papa Malick Ngom, Mapathé Ndiaye

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This work shows the Kédougou-Kéniéba inlier (eastern Senegal) pillow lavas behavior from laboratory to field. Some uniaxial tests are carried out on five types of specimens of pillow lavas. These types of specimens are: macroscopicly healthy rock, fractured rock without filling, fractured rock filled with epidote, chlorite and calcite and rocks with tension crack filled with quartz. The Young moduli and the uniaxial compression strength are good for the healthy rock. The Young moduli fall slightly for facies with horizontal cracks while uniaxial compression strength (Rc) varies slightly. For filled fractured specimens, Rc and Young modulus (E) decrease remarkably. Decreases are most important for cracks filled with epidote, chlorite and calcite than with quartz. That is due to the differences of rigidity between these materials. Also, the slope stability of hillsides in this area depends on to these characteristics.

Unconfined Compression Test-Uniaxial Compression Strength (UCT, Rc), JRC (Joint Roughness Coefficient), Young Modulus (E), Roughness, Kédougou-Kéniéba Inlier, Linea-ments, Discontinuities, Dihedral, Slope, Hillside

D. Sarr, M. Fall, P. Ngom and M. Ndiaye, "Mechanical Behavior of Pillow Lavas in MakoSupergroup: Case of South Mako Hill," International Journal of Geosciences, Vol. 2 No. 4, 2011, pp. 640-647. doi: 10.4236/ijg.2011.24065.