However, the meso-scale deformation patterns observed in the Águas Claras road section point to a hitherto unrecognised level of structural complexity that may exist adjacent to comparable transpressional fault zones in many Mesozoic and Cenozoic settings. The structures are generally comparable to published descriptions of fold and fault assemblages from shallow-crustal transpressional settings, notably along the San Andreas Fault. The youngest sequence of rocks affected by sinistral transpression along the CFZ-the Águas Claras Formation-were apparently deformed prior to complete lithification and developed a complex assemblage of disharmonic, curvilinear folds and associated transpressional fault arrays. 2.6 Ga led to faulting and folding during partial inversion of the cover rocks in these dilational sites with much of the associated deformation focused in the immediate vicinity (<2 km) of the major fault traces. A postulated early regional phase of dextral movement downfaulted units of low-grade to unmetamorphosed basement rocks into dilational bends and offsets in the CaSSS.
The subvertical faults reactivated pre-existing, high-grade basement shear-zone fabrics (Itacaiúnas shear zone) and display a complex, long-lived history of movement (>1 Ga) dominated by oblique- and strike-slip displacements. Arabian Journal of Geosciences Springer Journals The Carajás fault zone (CFZ) is the most prominent structure in the E–W-trending Carajás strike-slip system (CaSSS), an ancient upper crustal fault network of probable Late Archaean age that cuts across the Precambrian Amazonian Craton in Brazil. On the other hand, the formation of the Dead Sea Transform during the Miocene occurred along the N-S to NNE-SSW trending fault system, which was reactivated as sinistral fault. The NNE to N-S trend sets explain the reactivation of the late Neoproterozoic structures during Tertiary times. Results show that the Late Neoproterozoic structures were reactivated during the Cenozoic and controlled the recent movement along the Dead Sea Rift. This study found the main trends of weakness zones, the kinematics, and the relation to main stress field in the region.
Whereas any cracks, joints, or small displacement in the Pleistocene and Holocene deposits are assumed to represent the activity or, more recently, deformation of the local area where they found. During this study, it was assumed that any discontinuity in granitic rocks is a plane of weakness neoformed or inherited and reactivated during the successive tectonic phases. These stations represent wadi cliffs, stream channels, alluvial fans in the Pleistocene to Holocene sediments, and granitic rocks.
Fault-slip data, joints, and any weakness zone data from the study area were collected from 20 stations. This study is based on measurement of hundreds of fractures (small faults, joints, cracks) in the crystalline rocks (Precambrian) and in Quaternary deposits of the investigated area east of Aqaba. Fracture systems of granites and Quaternary deposits of the area east of Aqaba: indicators of reactivation and neotectonic activity Fracture systems of granites and Quaternary deposits of the area east of Aqaba: indicators of.