Northern Arabian Shield shear zones: strain analysis comparison

  • Haitham M. BaggaziEmail author
  • Wadee A. AlKashghari
  • Abdelhamid Elfakharani
  • Mohamed Matsah
  • Mohamed K. El-Shafei
AGIC 2017
Part of the following topical collections:
  1. Geology of North Africa and Mediterranean regions


Ajjaj-Qazaz-Hanabiq shear zones (AQH-SZ) are ductile to semi-ductile shear zones that are located within the Midyan terrane in the northwestern part of the Arabian Shield. They expose Neoproterozoic rock assemblages that comprise an elongated ridge of ophiolitic rocks, arc-metavolcanics, and contemporary arc-related intrusions. They are unconformably overlain by the post-amalgamation molasses-type sediments and finally intruded by late- to post-tectonic intrusions. The strain analysis results of the AQH-SZ are consistent with no significant differences. The average of RsXZ values in the three shears ranges from 2 to 2.22, while the RsYZ average ranges from 1.7 to 1.9. The average of stretching in the three shears ranges from 34 to 42%, while the shortening ranges from 33 to 37%. The stretching direction is oriented parallel to the shear trends; WNW directions in the Ajjaj and Qazaz shear zones, and NNE direction in the Hanabiq shear zone. The change in direction of stretching is suggested to be due to the exhumation of gneissic cores which also might have caused the presence of a local dextral sense in Hanabiq shear zone. Based on the similarity in the strain analysis results and the absence of overprinting relationships at the conjunction areas of the three shears, it is concluded that the three shears are one major shear.


Qazaz-Ajjaj-Hanabiq shear zones Najd fault system Strain analyses Exhumation of the core complex Shear sense indictors 



The authors acknowledge with thanks King Abdulaziz University for technical and financial support. The authors would like to thank the Saudi Geological Survey, for all kinds of support and help during the field works of this study. Special thanks to Prof. El-Sawy and Dr. Masrouhi for their incredible help and support. Thanks are also due to the guest editor Dr. Khomsi and the two anonymous reviewers for their constructive comments and suggestions. StrainCalculator v3.2 software of Dr. Rod Holcombe, and EllipseFit 3.2.2 software of Dr. Frederick Vollmer were used in this study. 


  1. Abd-Allah AMA, Ahmed AH, El-Fakharani A, El-Sawy EK, Ali KA (2014) Fatima suture: a new amalgamation zone in the western Arabian Shield, Saudi Arabia. Precambrian Res 249:57–78CrossRefGoogle Scholar
  2. Abu El-Enen MM, Abu Alam T, Whitehouse M, Ali K, Okrusch M (2016) P-T path and age of crustal thickening during the collision of East and West Gondwana: a case study from the Hafafit Metamorphic Complex, Eastern Desert of Egypt. Lithos 263:213–238CrossRefGoogle Scholar
  3. Abu-Alam TS, Hassan M, Stüwe K, Meyer SE, Passchier CW (2014) Multistage tectonism and metamorphism during Gondwana collision: Baladiyah complex, Saudi Arabia. J Petrol 55(10):1941–1964CrossRefGoogle Scholar
  4. Adrian FC, Boger SD, Fay C (2016) Constriction structures related to viscous collision, southern Prince Charles Mountains, Antarctica. J Struct Geol 46:142–157Google Scholar
  5. Al-Husseini MI (2000) Origin of Arabian plate structures; Amar collision and Najd rift. Geo Arabia 5:527–542Google Scholar
  6. AlKashghari, W. A. 2017. Tectonic styles of Hanabiq, Ajjaj, and Qazaz shear zones: implication of oblique transpression in the Arabian Shield, Saudi Arabia, Ph.D. thesis. King Abdilaziz UniversityGoogle Scholar
  7. Al-Saleh AM, Kassem OMK (2012) Microstructural finite strain analysis and 40Ar/39Ar evidence for the origin of the Mizil gneiss dome, eastern Arabian Shield, Saudi Arabia. J Afr Earth Sci 70:24–35CrossRefGoogle Scholar
  8. Baggazi H (2011). Geological strain analysis in the Murphy belt, southern Appalachian Orogen, Georgia, USA. Ph.D. thesis. Florida State UniversityGoogle Scholar
  9. Crespi JM (1986) Some guidelines for the practical application of Fry’s method of strain analysis. J Struct Geol 16:1327–1330Google Scholar
  10. Dasgupta N, Mukhopadhyay D, Bhattacharyya T (2012) Analysis of superposed strain: a case study from Barr Conglomerate in the South Delhi Fold Belt, Rajasthan, India. J Struct Geol 34:30–42CrossRefGoogle Scholar
  11. Davies FB (1984) Strain analysis of wrench faults and collision tectonics of the Arabian–Nubian shield. J Geol 82:37–53CrossRefGoogle Scholar
  12. Davies FB, McEwen G (1985) Geologic map of the Al Wajh quadrangle, sheet 26 B. Kingdom of Saudi Arabia: Saudi Arabian Deputy Ministry for Mineral Resources Geologic Map GM-83:27 scale 1:250,000Google Scholar
  13. Duncan IJ, Rivard B, Arvidson RE, Sultan M (1990) Structural interpretation and tectonic evolution of a part of the Najd Shear Zone (Saudi Arabia) using Landsat thematic-mapper data. Tectonophysics 178:309–315CrossRefGoogle Scholar
  14. Dunne WM, Onasch CM, Williams RT (1990) The problem of strain-marker centers and the Fry method. J Struct Geol 12:933–1990CrossRefGoogle Scholar
  15. El-Sawy KE-S, Amara M 2018. Structural style and kinematic evolution of Al Ji’lani area, Ad Dawadimi terrane, Saudi Arabia J Afr Earth Sci doi:
  16. Erslev EA (1988) Normalized center-to-center strain analysis of packed aggregates. J Struct Geol 10:201–209CrossRefGoogle Scholar
  17. Flinn D (1978) Construction and computation of three-dimensional progressive deformations. J Geol Soc Lond 135:291–305CrossRefGoogle Scholar
  18. Fry N (1979) Random point distribution and strain measurement in rocks. Tectonophysics 60:89–105CrossRefGoogle Scholar
  19. Genna A, Nehlig P, Le Goff E, Guerrot C, Shanti M (2002) Proterozoic tectonism of the Arabian Shield. Precambrian Res 117:21–40CrossRefGoogle Scholar
  20. Hadley DG (1974) The taphrogeosynclinal Jubaylah group in the Mashhad area, northwestern Hijaz. Kingdom of Saudi Arabia: Saudi Arabian Directorate General of Mineral Resources Bulletin 10:18Google Scholar
  21. Hanna SS, Fry N (1979) A comparison of methods of strain determination in rocks from southwest Dyfed (Pembrokeshire) and adjacent areas. J Struct Geol 1(2):155–162CrossRefGoogle Scholar
  22. Hassan M, Stüwe K, Abu-Alam TS, Klötzli U, Tiepolo M (2016a) Time constraints on deformation of the Ajjaj branch of one of the largest Proterozoic shear zones on Earth: the Najd fault system. Gondwana Res 34:346–362CrossRefGoogle Scholar
  23. Hassan M, Abu-Alam TS, Hauzenberger C, Stüwe K (2016b) Geochemical signature variation of pre-, syn-, and post-shearing intrusives within the Najd fault system of western Saudi Arabia. Lithos 263:274–291CrossRefGoogle Scholar
  24. Holcombe (2009), Straincalculator, (Computer software)Google Scholar
  25. Johnson PR, Kattan FK (2012) The geology of the Arabian Shield. A review of the geology of Precambrian rocks. SGS, Special Publication, Kingdom of Saudi ArabiaGoogle Scholar
  26. Johnson PR, Andersen A, Collins AS, Fowler AR, Fritz H, Ghebrab W, Kusky T, Stern RJ (2011) Late Cryogenian–Ediacaran history of the Arabian–Nubian Shield: a review of depositional, plutonic, structural, and tectonic events in the closing stages of the northern East African Orogen. J Afr Earth Sci 61(3):167–232CrossRefGoogle Scholar
  27. Kemp J Pellaton C Calvez J-Y 1980. Geochronological investigations and geological history in the Precambrian of northwestern Saudi Arabia: Saudi Arabian Directorate General of Mineral Resources Open-file Report BRGM-OF-01-1: 120Google Scholar
  28. Küster D (2009) Granitoid-hosted Ta mineralization in the Arabian–Nubian Shield: ore deposit types, tectono-metallogenetic setting and petrogenetic framework. Ore Geol Rev 35:68–86CrossRefGoogle Scholar
  29. Long S, McQuarrie N, Tobgay T, Hawthorne J (2011) Quantifying internal strain and deformation temperature in the eastern Himalaya, Bhutan: implications for the evolution of strain in thrust sheets. J Struct Geol 33:579–608CrossRefGoogle Scholar
  30. Marshak S Mitra G 1988. Basic methods of structural geology, Prentice HallGoogle Scholar
  31. Matsah MIM, Kusky TM (2001) Analysis of Landsat ratio imagery of the Halaban-Zarghat fault and related Jifn basin, NE Arabian shield: implications for the kinematic history of the Najd fault. Gondwana Res 4:182CrossRefGoogle Scholar
  32. McNaught MA (2002) Estimating uncertainty in normalized Fry plots using a bootstrap approach. J Struct Geol 24:311–322CrossRefGoogle Scholar
  33. Mulchrone KF (2013) Fitting the void: data boundaries, point distributions and strain analysis. J Struct Geol 46:22–33CrossRefGoogle Scholar
  34. Passchier, C. 2010. Th e Al Wajh area shear zone system, northwest Saudi Arabia: Saudi Geological Survey Technical Report SGS-TR-2010-2: 76–77Google Scholar
  35. Pellaton C 1982. Geologic map of the Umm Lajj quadrangle, sheet 25 B, Kingdom of Saudi Arabia: Saudi Arabian Deputy Ministry for Mineral Resources Geologic Map GM-61, 14. scale 1:250,000Google Scholar
  36. Pluijm and Marshak, 2004. Earth structure, an introduction to structural geology and tectonic. 2nd Ed. United States: No. 9, 63, 352. Norton & Company, Inc.Google Scholar
  37. Schmidt DL, Hadley DG, Greenwood WR, Gonzalez L, Coleman RG, Brown GF (1973) Stratigraphy and tectonism of the southern part of the precambrian shield of Saudi Arabia: Saudi Arabian Dir. Gen Mineral Resources Bull 8:13Google Scholar
  38. Schmidt DL Hadley DG Stoeser DB 1979. Late Proterozoic crustal history of the Arabian Shield, southern Najd province, Kingdom of Saudi Arabia, evolution, and mineralization of the Arabian-Nubian Shield: King Abdulaziz University, Institute of Applied Geology Bulletin 3, V. 2: Pergamon press, Oxford-New York, P. 41–58Google Scholar
  39. Shan Y, Xiao W (2011) A statistical examination of the Fry method of strain analysis. J Struct Geol 33:1000–1009CrossRefGoogle Scholar
  40. Soares A, Dias R (2015) Fry and Rf/ϕ strain methods constraints and fold transection mechanisms in the NW Iberian Variscides. J Struct Geol 79:19–30CrossRefGoogle Scholar
  41. Stern RJ (1985) The Najd fault system, Saudi Arabia and Egypt: a late Precambrian rift-related transform system? Tectonics 4:497–511CrossRefGoogle Scholar
  42. Stern RJ, Johnson PR (2010) Continental lithosphere of the Arabian Plate: a geologic, petrologic, and geophysical synthesis. Earth Sci Rev 101:29–67CrossRefGoogle Scholar
  43. Stoeser, D. B. Camp, V. E. 1985. Pan-African microplate accretion of the Arabian Shield, Kingdom of Saudi Arabia: USGS TR-04-17: 26Google Scholar
  44. Takeshita T, El-Fakharani A (2013) Coupled micro-faulting and pressure solution creep overprinted on quartz schist deformed by intracrystalline plasticity during exhumation of the Sambagawa metamorphic rocks, southwest Japan. J Struct Geol 90:128–143Google Scholar
  45. Treagus SH, Treagus JE (2002) Studies of strain and rheology of conglomerates. J Struct Geol 24:1541–1567CrossRefGoogle Scholar
  46. Tull JF, Baggazi H, Groszos MS (2012) Evolution of the murphy synclinorium, southern Appalachian Blue Ridge, USA. J Struct Geol 44:151–166CrossRefGoogle Scholar
  47. Vollmer FW, 2018. EllipseFit: strain and fabric analysis software. Retrieved from

Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Structural Geology and Remote Sensing Department, Faculty of Earth SciencesKing Abdulaziz UniversityJeddahSaudi Arabia
  2. 2.Geological Survey DepartmentSaudi Geological SurveyJeddahSaudi Arabia
  3. 3.Geology Department, Faculty of ScienceAswan UniversityAswanEgypt
  4. 4.Geology Department, Faculty of ScienceSuez Canal UniversityIsmailiaEgypt

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