干旱区生态环境知识资源中心(Arid): Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective

Arid

DOI	10.1007/s12517-021-07613-2
	Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective
	Kassem, Osama M. K.; Al Faifi, Hussain J.; Gahlan, Hisham A.; Al Bassam, AbdelAziz M.; Zoheir, Basem A.; Zaidi, Faisal K.
通讯作者	Kassem, OMK (corresponding author), King Saud Univ, Fac Sci, Geol & Geophys Dept, Riyadh 11451, Saudi Arabia. ; Kassem, OMK (corresponding author), Natl Res Ctr, Dept Geol, Al Behoos Str, Cairo 12622, Egypt.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14 期号:13
英文摘要	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/phi 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.
英文关键词	Finite strain Microstructures Al Amar-Idsas suture Eastern Arabian Shield Saudi Arabia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000677560900005
WOS关键词	MIZIL GNEISS DOME ; WADI MUBARAK BELT ; KINEMATIC ANALYSIS ; AR-40/AR-39 EVIDENCE ; DEFORMATION HISTORY ; VORTICITY ANALYSIS ; NORTHERN THRUST ; AFRICAN OROGEN ; NUBIAN SHIELD ; DESERT
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	King Saud University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362540
作者单位	[Kassem, Osama M. K.; Al Faifi, Hussain J.; Gahlan, Hisham A.; Zaidi, Faisal K.] King Saud Univ, Fac Sci, Geol & Geophys Dept, Riyadh 11451, Saudi Arabia; [Kassem, Osama M. K.] Natl Res Ctr, Dept Geol, Al Behoos Str, Cairo 12622, Egypt; [Gahlan, Hisham A.] Assiut Univ, Dept Geol, Fac Sci, Assiut 71516, Egypt; [Al Bassam, AbdelAziz M.] Natl Ctr Water Res & Studies NCWRS, MEWA, Riyadh, Saudi Arabia; [Zoheir, Basem A.] Benha Univ, Dept Geol, Fac Sci, Banha 13518, Egypt; [Zoheir, Basem A.] Univ Kiel, Inst Geosci, Ludewig Meyn Str 10, D-24118 Kiel, Germany
推荐引用方式 GB/T 7714	Kassem, Osama M. K.,Al Faifi, Hussain J.,Gahlan, Hisham A.,et al. Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective[J]. King Saud University,2021,14(13).
APA	Kassem, Osama M. K.,Al Faifi, Hussain J.,Gahlan, Hisham A.,Al Bassam, AbdelAziz M.,Zoheir, Basem A.,&Zaidi, Faisal K..(2021).Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective.ARABIAN JOURNAL OF GEOSCIENCES,14(13).
MLA	Kassem, Osama M. K.,et al."Evolution of the Al Amar-Idsas suture, eastern Arabian Shield: a strain analysis perspective".ARABIAN JOURNAL OF GEOSCIENCES 14.13(2021).