Abstract
Finite strain analysis is used to decipher the tectonic evolution of the Al Amar–Idsas suture in the eastern segment of the Neoproterozoic Arabian Shield. Asymmetrical porphyroblasts and sigmoidal structural markers from three areas along the strike of the suture, namely the Nakhyilan, Al Amar, and Jabal Al Tays, are envisaged to reveal their strain factors. The Rf/φ and Fry techniques are employed to quartz and feldspar porphyroclasts, hornblende, and biotite flakes in 24 samples from the Abt schist, metavolcano-sedimentary rocks, and sheared granitoids. The results revealed that these rocks have experienced shape flattening and accumulation of the finite strain and an overall volume loss. The strain magnitude increases apparently across the nappe contacts with the neighboring lithologies. Development of subhorizontal foliation was presumably synchronistic with thrusting and nappe stacking, nearly parallel to the tectonic contacts. Ductile strain accumulation/crustal shortening during thrusting along the Al Amar-Idsas suture most likely encompassed a significant pure shear component. Progressive thrusting by superimposed transpression and oblique convergence is manifested by stacked nappes and diagonal stretching lineations along the thrust planes. The widespread subhorizontal lineation may represent the latest activity in the evolution of the suture. The results of the present study argue against the widely accepted model which relates the orogen-scale structures in the Arabian Shield to oblique convergence with dominant simple shear deformation. A substantial pure shear component/crustal thickening increment should have played an important role in the evolution of the suture and thus in the overall deformation history of the Shield.
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References
Abdelsalam MG, Abdeen MM, Dowaidar H, Stern RJ, Abdelghaffar AA (2003) Structural evolution of the Neoproterozoic Western Allaqi-Heiani Suture. Southeastern Egypt Precambrian Res 124:87–104
Al-Saleh AM, Boyle AP (2001) Structural rejuvenation of the eastern Arabian Shield during continental collision: 40Ar/39Ar evidence from the Ar Ridaniyah ophiolite mélange. J Afr Earth Sci 33:135–141
Al-Saleh AM, Kassem OM (2012) Microstructural finite strain analysis and 40Ar/39 Ar evidence for the origin of the Mizil gneiss dome, eastern Arabian Shield, Saudi Arabia. J Afr Earth Sci 70:24–35
Al-Shanti AM, Gass IG (1983) The Upper Proterozoic ophiolite mélange zones on the easternmost Arabian shield. J Geol Soc Lond 140:867–876
Al-Shanti AMS, Mitchell AHG (1976) Late Precambrian subduction and collision in the Al Amar-Idsas region. Arabian shield, Kingdom of Saudi Arabia: Tectonophysics 30:T41–T47
Al-Shanti AMS, Abdel-Monem AA, Marzouki FH (1984) Geochemistry, petrology and Rb-Sr dating of trondhjemite and granophyre associated with JabalTays ophiolite, Idsas area, Saudi Arabia. Precambrian Res 24:321–334
Bosworth W, Stockli DF, Helgeson DE (2015) Integrated outcrop, 3D seismic, and geochronologic interpretation of Red Sea dike-related deformation in the Western Desert, Egypt—the role of the 23 Ma Cairo “mini-plume”. J Afr Earth Sci 109:107–119
Cowan DS (1990) Kinematic analysis of shears zones in sandstone and mudstone of the Shimanto belt, Shikokn, SW Japan. J Struct Geol 12:431–441
Cox GM, Lewis CJ, Collins AS, Halverson GP, Jourdan F, Foden J, Nettle D, Kattan F (2012) Ediacaran terrane accretion within the Arabian-Nubian Shield. Gondwana Res 21:341–352
Delfour J (1983) Geologic map of the Wadi Ar-Rayn Quadrangle, sheet 23H (without topographic base). Saudi Arabian Deputy Ministry of Mineral Resources, Geoscience Map GM-63-A scale 1:250,000
Doebrich JL, Al-Jehani AM, Siddiqui AA, Hayes TS, Saleh Y, Wooden JL, Johnson PR, Kattan FH, Shaikan B, Basahel M, Zahran H, Al-Shammari A (2007) Geology and mineral resources of the Ar-Rayn terrane. Eastern Arabian Shield, Kingdom of Saudi Arabia, Precambrian Research 158:17–50
Flinn D (1962) On folding during three-dimensional progressive deformation. Q J Geol Soc 118(1-4):385–428
Fritz H, Abdelsalam M, Ali KA, Bingen B, Collins AS, Fowler AR, Ghebreab W, Hauzenberger CA, Johnson PR, Kusky TM, Macey P, Muhongo S, Stern RJ, Viola G (2013) Orogen styles in the East African Orogen: a review of the Neoproterozoic to Cambrian tectonic evolution. J Afr Earth Sci 86:65–106
Gerbi C, Johnson SE, Paterson SR (2004) Implications of rapid, dike-fed pluton growth for host-rock strain rates and emplacement mechanisms. J Struct Geol 26(3):583–594
Gosh SK, Ramberg H (1976) Reorientation of inclusions by combination of pure shear and simple shear. Tectonophysics 34:1–70
Hamimi Z, Kassem OMK, El-Sabrouty MN (2015) Application of kinematic vorticity technique for mylonitized rocks in Al Amar suture, Eastern Arabian Shield, Saudi Arabia. Geotectonics 49(5):439
Hossack JR (1968) Pebble deformation and thrusting in the Bygdin area (Southern Norway). tectonophysics 5:315–339
Johnson PR (1998) The structural geology of the Samran-Shayban area, Kingdom of Saudi Arabia: Saudi Arabian Deputy Ministry for Mineral Resources Technical Report USGS-TR-98-02, 45 p
Johnson PR, Kattan F (2001) Oblique sinistraltranspression in the Arabian shield: the timing and kinematics of a Neoproterozoic suture zone. Precambrian Res 107:117–138
Johnson PR, Abdelsalam MG, Stern RJ (2003) The Bi’rUmq-Nakasib suture zone in the Arabian-Nubian Shield: a key to understanding crustal growth in the East African Orogen. Gondwana Res 6:523–530
Johnson P, Andresen A, Collins AS, Fowler TR, Fritz H, Ghebreab W, Kusky T (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. African Journal of Earth Sciences 61:167–232
Kahal AY, Abd El-Motaal E, Kassem OMK, Al Ghoreiby AHR (2019) Strain analysis and deformation history of Zalm area, Arabian Shield, Saudi Arabia. J Afr Earth Sci 150:441–450
Kassem OMK (2011) Determining heterogeneous deformation for granitic rocks in the Northern thrust in Wadi Mubark belt, Eastern Desert, Egypt. Geotectonics Journal 45(3):244–254
Kassem OMK (2012) Kinematic vorticity technique for porphyroclasts in the metamorphic rocks: an example from the Northern thrust in Wadi Mubarak belt, Eastern Desert, Egypt. Arab J Geosci 5(1):159–167
Kassem OMK (2014) Kinematic analysis of the Migif area in the Eastern Desert of Egypt. J Afr Earth Sci 90:136–149
Kassem OMK (2015) Strain analysis and deformation in the Tanumah Area, Arabian Shield, Saudi Arabia. Arab J Geosci 8(6):4127–4138
Kassem OMK, Abdel Raheim S (2010) Finite strain analysis for the Metavolcanic-sedimentary rocks in the Gabel El- Mayet region, Central Eastern Desert, Egypt. J Afr Earth Sci 58:321–330
Kassem OMK, Al-Saleh AM (2018) Vorticity analysis and deformation history of the Mizil Gneiss Dome, Eastern Arabian Shield, Saudi Arabia. Geotectonics 52(3):346–358
Kassem OK, Ring U (2004) Underplating-related finite-strain patterns in the Gran Paradiso massif, Western Alps, Italy: heterogeneous ductile strain superimposed on a nappe stack. J Geol Soc Lond 161:875–884
Kassem OMK, Zakaria H (2014) Application of finite strain technique for deformed lithologies in Al Amar suture, Eastern Arabian Shield. The Open Geology Journal 8(Suppl 1: M7):97–106
Kassem OMK, Abd El Rahim SH, El Nashar ER (2012) Strain analysis and Microstructural evolution characteristic of Neoproterozoic rocks associations of Wadi El Falek, Centre Eastern Desert, Egypt. Geotectonics 46(5):379–388
Kassem OMK, Almutairi ALA, Al Bassam AAM, Al Faifi HJ (2016) Relationship between finite Strain and tectonic setting in the Ar Ruwaydah area, eastern Arabian Shield, Saudi Arabia. Arab J Geosci 9(19:728):1–10
Kassem OMK, Ibrahim EKHH, Lashin A, Almutari M (2019a) Strain analysis and microstructural investigation of the Jabal Tays ophiolite complex, Eastern Arabian Shield. Saudi Arabia Geotectonics 53(6):752–764
Kassem OMK, Zakaria H, Aboelkhair H, Abdelhalim A, Al-Gabali M (2019b) Microstructural study and strain analysis of deformed Neoproterozoic lithologies in Um Junud area, Northern Nubian Shield. Geotectonics 53(1):125–139
Lami A, Mohammed N, Kassem OMK, Al Bassam AAM (2020) Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia. Arab J Geosci. https://doi.org/10.1007/s12517-020-5278-z
Nadai A (1963) Theory of flow and fracture of solids. McGraw-Hill, New York, 705p
Nawab Z, 1978. Evolution of the Al Amar Idasas region of the northern part of the Arabian Shield (Kingdom of Saudi Arabia): Bull du BRGM (deuxieme series), p. 1–19
Nawab Z, 1979. Geology of the Al-Amar-Idsas region of the Arabian Shield: Institute of Applied Geology (Jeddah) Bulletin, v. 3, no. 2, p.2940
Owens W (1984) The calculation of a best-fit ellipsoid from elliptical sections on arbitrarily orientated planes. J Struct Geol 6(5):571–578
Passchier CW (1987) Stable positions of rigid objects in non-coaxial flow: a study in vorticity analysis. J Struct Geol 9:679–690
Passchier CW (1990) Reconstruction of deformation and flow parameters from deformed vein sets. Tectonophysics 180:185–199
Passchier CW, Trouw RA (1995) Microtectonics. Springer, Berlin Heidelberg New York
Passchier CS, Urai JL (1988) Vorticity and strain analysis using Mohr diagrams. J Struct Geol 10:755–763
Ramsay JG (1967) Folding and fracturing of rocks. McGraw-Hill, New York, London, 568 pp
Ramsay JG (1980) Shear zone geometry: a review. J Struct Geol 2(1–2):83–99
Ramsay JG, Huber M (1983) The techniques of modern structural geology, volume 1, strain analysis. Academic Press, London
Ramsay JG, Huber MI (1987) The techniques of modern structural geology: folds and fractures. Academic press
Ring U (1998) Exhumation of blue schists from Samos Island. Geological Society of Greece Bulletin V. 32, pp. 97–104. Saudi Arabia. J Geol Soc Lond 136:441–454
Ring U, Brandon MT (1999) Deformation and mass loss in the Franciscan subduction complex: implications for exhumation processes in accretionary wedges, in exhumation processes: normal faulting, Ductile flow, and erosion. In: Ring U, Brandon MT, Lister GS, Willett SD (eds) Geological Society of London Special Publications, vol 154, pp 55–86
Ring U, Kassem OMK (2007) The nappe rule: why does it work? J Geol Soc 164:1109–1112
Ring U, Brandon MT, Ramthun A (2001) Solution-mass-transfer deformation adjacent to the Glarus thrust, with implications for the tectonic evolution of the Alpine wedge in eastern Switzerland. J Struct Geol 23:1491–1505
Simpson C, De Poar DG (1993) Strain and Kinematic analysis in general shear zones. J Struct Geol 15:1–20
Stacey JS, Stoeser DB, Greenwood WR, Fischer LB (1984) U-Pb zircon geochronology and geologic evolution of the Halaban-Al Amar region of the eastern Arabian Shield, Kingdom of Saudi Arabia. J Geol Soc Lond 141:1,043–1,055
Stern RJ (2002) Crustal evolution in the East African Orogen: a neodymium isotopic perspective. J Afr Earth Sci 34:109–117
Stoeser DB, Camp VE (1985) Pan-African microplate accretion of the Arabian Shield. Geol Soc Am Bull 96:817–826
Stoeser DB, Stacey JS, Greenwood WR, Fischer LB (1984) U/Pb Zircon Geochronology of the Southern Part of the Nabitah Mobile Belt and Pan-African Continental Collision in the Saudi Arabian Shield. In: Saudi Arabian Deputy Ministry for Mineral Resources Technical Record USGS-TR-04-5, p 88
Wallis SR (1992) Vorticity analysis in a metachert from the Sanbagawa belt, SW Japan. J Struct Geol 14:271–280
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This project was funded by the National Plan for Science, Technology and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number (14-SPA 154-02)
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This article is part of the Topical Collection on Current Advances in Geology of North Africa.
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Kassem, O.M.K., Al Faifi, H.J., Gahlan, H.A. et al. Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective. Arab J Geosci 14, 1237 (2021). https://doi.org/10.1007/s12517-021-07613-2
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DOI: https://doi.org/10.1007/s12517-021-07613-2