THE EFFECTS OF DYKES AND FAULTS ON GROUNDWATER FLOW ANF STORAGE IN SAINT KATHERINE AREA, (original) (raw)

Saint Katherine area is situated in the central part of the Sinai Peninsula. It is characterized by higher flashing precipitation (62 mm/year) due to confrontation of moist air masses in higher altitudes. The study area is part of the Precambrian Arab-Nubian Massif rocks. This bedrock is, however, dissected by numerous lineaments, mostly faults and basaltic dykes, some of which transport groundwater to the surface in springs and wells. Many of these dykes consist of dense, low-permeability basalt reaching thicknesses of up to 10 ms, and lengths', of up to several kilometers. They also have some faults, fractures and shear zones, many of which meet with the dykes at nearly right angles. Groundwater is, thus, collected by dykes and transported towards the topographic depressions occupied by the high-permeability fault zones.

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