โ Scribed by Shield A. Giraud; F. Thouvenot; R. Huber
No coin nor oath required. For personal study only.
Studies of dam sites in the southwestern region of Saudi Arabia gave the opportunity to undertake an in-depth study of the old basement of the Arabian shield.
By comparing the results obtained at all scales (seismicity, fracturing of the shield, data on overall tectonics and in-situ measurements) it has been possible to formulate an explanation concerning the anisotropy observed during the geotechnical surveys of the studied sites.
In our view, this anisotropy is to be considered in relation to a substantial stress condition in the Arabian plate, at least towards its southwestern limits. The observed compression would appear to occur in a NE--SW to E--W direction.
๐ SIMILAR VOLUMES
An extensive terrane of continental gneisses and supracrustal metasediments extends from the Nile valley westwards between southern Egypt and northcrn Kenya, and also occurs in southern Ethiopia, Somalia and parts of the easternmost Arabian Shield. Mica-beryl pegmatites and associated kyanite are ch