Quantifying 3D post-accretionary tectonic strain in the Arabian–Nubian Shield: Superimposition of the Oko Shear Zone on the Nakasib Suture, Red Sea Hills, Sudan

Abdelsalam, Mohamed G.

doi:10.1016/j.jafrearsci.2009.07.003

Cited by 27 publications

(18 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 ). Emplacement of greenschist-facies (locally metamorphosed to amphibolites-facies), SE-verging nappes during earlystages of the Nakasib deformation, resulted from closing of an oceanic domain along a N-dipping subduction zone at ∼750 Ma ( Abdelsalam and Stern, 1993 , Abdelsalam, 2010 ), a model that is contradicted by Schandelmeier et al (1994) and Wipfler (1996) . Some oblique slip is inferred from flower structure geometry associated with dextral displacement along the southern margin of the Nakasib suture ( Schandelmeier et al, 1994 , Johnson et al, 2003 ).…”

Section: Accretion and Thickening In The Arabian–nubian Shieldmentioning

confidence: 99%

“…13 ) offsets the780–750 Ma old Nakasib suture sinistrally by ∼10 km. It formed through three phases ( Abdelsalam, 1994 , Abdelsalam, 2010 ). The earliest was initiated by E–W shortening and produced N- to NNW-trending upright mostly tight to isoclinal folds.…”

Section: Orogen Decay and Post-accretionarymodification In The Arabiamentioning

confidence: 99%

“…Deformation ceased before intrusion of undeformed, post-tectonic granites during this time ( Stern et al, 1989 ). Overall, both the Oko and Hamisana high strain zones are characterized by pure shear expressed as E–W-shortening and strong N–S extension resulting in bulk constrictional strain ( Abdelsalam, 2010 , De Wall et al, 2001 ).…”

Section: Orogen Decay and Post-accretionarymodification In The Arabiamentioning

confidence: 99%

See 2 more Smart Citations

Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution

Fritz

Abdelsalam

Ali

et al. 2013

Journal of African Earth Sciences

636

348

View full text Add to dashboard Cite

GraphicalabstractCondensed timetable of major geologic events in the East African Orogen. Opening of the Mozambique Ocean and formation of rift basins in Zambia, Malawi, Mozambique and SW Madagascar was accompanied by emplacement of anorthosite melt in extending crust. A first phase of ocean closure and accretion of terranes defines the East African Orogeny. The second orogen phase, Kuungan Orogeny, mainly affected the southern parts of east Africa and Madagascar. Both shortening events were followed by extension phases that were accompanied by emplacement of late- to post-tectonic granitoids. EGCD: Eastern Granulite–Cabo Delgado Nappe Complex; Madag: Madagascar; Ub–Us: Usagaran/Ubendian Belts; WG: Western Granulite Belt; IB (Z–M): Irumide Belt of Zambia and Malawi; IB (M): Irumide Belt of Mozambique.

show abstract

Section: Accretion and Thickening In The Arabian–nubian Shieldmentioning

confidence: 99%

Section: Orogen Decay and Post-accretionarymodification In The Arabiamentioning

confidence: 99%

Section: Orogen Decay and Post-accretionarymodification In The Arabiamentioning

confidence: 99%

See 1 more Smart Citation

Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution

Fritz

Abdelsalam

Ali

et al. 2013

Journal of African Earth Sciences

636

348

View full text Add to dashboard Cite

show abstract

“…This suture zone, which evolved during the 783-764 Ma interval [1], is located at about 100 km south of the study area. Based on other assumptions, formation of the TBUS has been linked to collisions between intra-oceanic island arc and back arc terranes between 800 and 700 Ma [12][13][14][15]. In addition, they are considered as E-NE trending arc-arc sutures due to their association with ophiolite slivers (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The Najd Fault System (NFS), which is a NW-SE trending left lateral (wrench) strike-slip fault, is one of the structural features in the region that postdate the East African Orogeny (EAO) or the Pan African Orogeny [9,15]. The EAO took place between 670 and 610 Ma as a result of collision between the east and west Gondwanaland [9, 15 and 16].…”

Section: Introductionmentioning

confidence: 99%

Complex Tectonic History of Al-Yutamah Dome Area within Hijaz Terrane, Arabian Shield, South of Al Madinah, Saudi Arabia

Bamousa¹

2013

TOGEOJ

View full text Add to dashboard Cite

This paper documents the Al-Yutamah tectonic dome, located in the northwestern part of the Arabian Shield, Saudi Arabia. A new Infracambrian over-thrust fault zone is mapped, which superpose the Late Proterozoic rocks in the area. Kinematic indicators suggest top-to-the-south movements along this fault, mainly compressional and some extensional in nature. The area experienced several tectonic events that resulted in to a complex dome like structure formation with a surface area of 20 50 km 2 . The S 1 cleavages, which have been determined as the oldest structural features in the area, are attributed to (D 1 ) tectonic event along the Labunah Thrust Fault. This event was followed by another deformational event (D 2 ) that produced N-S trending F 2 folds in the area. The third deformational event (D 3 ) observed in the area is the brittle high-angle reverse faults, which generally dip toward north and south, suggesting compressional nature of the event. Fourth deformational event (D 4 ) in the area resulted in the formation of E-W trending F 4 folding, which occurred subsequent to the development of Najd Strike-slip Faulting and F 2 folding. Superposition of the F 2 and F 4 folds in the area developed a complex structural feature in the shape of Al-Yutamah dome. Overthrusting of the meta-sedimentary rocks as a result of movement along the Al-Yutamah fault is considered as a fifth tectonic event (D 5 ). The Al-Yutamah over-thrust fault is most likely late Infracambrian in age, which is associated with the Najd Strikeslip Fault zone. The Cenozoic listric faulting that probably exhumed the dome is considered as a sixth deformational event (D 6 ) in the area. During the Cenozoic, cross-cut faults developed in the dome by high-angle normal faulting that dissected it into different segments.

show abstract

Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

El‐Wahed

Attia

2023

Geological Journal

View full text Add to dashboard Cite

Deforming belts in the Arabian‐Nubian Shield (ANS) are classified into (1) suture‐related belts, including arc–arc and arc‐continental, and (2) post‐accretionary systems, including N‐trending compression zones and NW‐trending strike‐slip faults. Terrane accretion took place in the ANS between 800 and 700 Ma, along arc–arc sutures. Such sutures are directed from E to NE in the northern part of the ANS, and from N to NE in the south, and are aligned in the north and east with N‐ or S‐verging ophiolitic nappes, or in the south with W‐verging nappes. The Asir, Hijaz, and Midyan terranes formed the Western Arabian shield by 715 Ma. The Afif terrane collided with the Hijaz and Asir terranes between 680 and 640 Ma, terminating the subduction along the Nabitah suture. Subduction began west of the Al Amar arc near the margin of the Ar Rayn terrane at 670 Ma. Afif and Ar Rayn terranes collided along the Al Amar‐Idsas suture about 640 Ma, producing the Idsas orogeny that initiated the major faulting and folding. Strike‐slip faults and upright folds related to oblique convergence between terranes and/or post‐accretionary systems deform the southern sutures. The eastern and western boundaries of the ANS are marked by arc‐continental sutures and characterized by N‐trending deformation belts that formed at 750–650 Ma when the ANS collided with East and West Gondwana.

show abstract

Quantifying 3D post-accretionary tectonic strain in the Arabian–Nubian Shield: Superimposition of the Oko Shear Zone on the Nakasib Suture, Red Sea Hills, Sudan

Cited by 27 publications

References 23 publications

Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution

Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution

Complex Tectonic History of Al-Yutamah Dome Area within Hijaz Terrane, Arabian Shield, South of Al Madinah, Saudi Arabia

Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

Contact Info

Product

Resources

About