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University of Akron (2005)

STRUCTURE AND TECTONICS OF A SELECTED AREA IN THE WEST OF WADI BIDDAH, SOUTHWESTERN SAUDI ARABIA

Baggazi, Haitham

Titre : STRUCTURE AND TECTONICS OF A SELECTED AREA IN THE WEST OF WADI BIDDAH, SOUTHWESTERN SAUDI ARABIA

Auteur : Baggazi, Haitham

Université de soutenance : University of Akron

Grade : Master of Science 2005

Résumé
Based on the analysis of foliations, joints, folds, lineations, and faults in the study area, three phases of deformations (D1, D2, and D3) have affected the area. D1 structure fabrics were not observed in the study area, but the pre-existing foliations (F1) is believed to be the result of this deformation event. Structural fabrics associated with D2 formed as the result of ESE-WNW compression while D3 was the result of NW-SE compression. D1 and D2 structure elements are believed to have formed as the result of the north to northwest arc-continental sutures (Nabitah suture) generated by the arc-continental terranes collision, which started 750-650 Ma, (Abdesalam and Stern, 1996). The Nabitah suture trends NW in the northern part of Arabian Shield and trends NNE in the southern part of the belt. The southern Nabitah sutures parallel the direction of D2 structures (strike of foliations and the fold axes of Fa folds). Greenschist metamorphism of the area is interpreted to be associated with D2. The D3 structure elements might have been associated with NW-SE compression. This direction is the same as that suggested to be the overall compression that formed the post-accretionary structures described by Abdesalam and Stern (1996).

Mots Clés : foliations ; Rock ; Chlorite ; lineations ; WADI ; trending ; folds

Présentation

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Page publiée le 7 décembre 2011, mise à jour le 26 décembre 2018