干旱区生态环境知识资源中心(Arid): Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia

Arid

DOI	10.1007/s12517-020-5278-z
	Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia
	Mohammed, Lami Abdel Karim Nouaman 1,2; Kassem, Osama Mohamed Kaoud 1,3; Al Bassam, Abdel Aziz Mohamed 1
通讯作者	Kassem, Osama Mohamed Kaoud
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:6
英文摘要	The Al Amar area has played important role to effect the Al Amar-Idsas fault zone, which consists of a sequence of volcanic rocks and sedimentary detrital. Also, it is characterized by a difference in facies with intruded granitoid bodies. The present work has used the finite strain techniques to investigate the relationship of the different lithologies and nappe contacts, which recorded in the Al Amar area. Furthermore, the microstructural analysis has investigated the Abt schist, deformed granitoids, and metavolcanic-sedimentary rocks, which represented the Al Amar area. The axial ratio results average from 1.55 to 2.87 for the Rf/phi method and 1.43 to 7.51 for the Fry method in the XZ sections for metamorphic rocks. In the finite strain data, the long axes direction (X) displays grouping along a NW-SE trend with shallow plunging. The direction of short axes (Z) displays subvertical and accompanied with a subhorizontal foliation. Our strain measurement reveals that strain symmetry shows an oblate shape (flattening) and the strain magnitudes do not display any valuable increasing towards the tectonic nappe contacts. Also, it is indicated that the volume change in the different rock units was unassociated with the accumulation of finite strain. In the investigated area, the subhorizontal foliation in the different lithologies was parallel to thrusting. Furthermore, it shows mainly the similar attitudes for tectonic contact nappes. In the present work, it is suggested that the ductile strain is accumulated during thrusting and involves as vertical shortening component with the subhorizontal foliation. The field observations with finite stain data are not sufficient to decide that the tectonic contact in the orogeny is formed as the simple-shear deformation.
英文关键词	Finite strain Neoproterozoic rocks Al Amar fault zone Eastern Arabian Shield
类型	Article
语种	英语
国家	Saudi Arabia ; Yemen ; Egypt
收录类别	SCI-E
WOS记录号	WOS:000520478000002
WOS关键词	WADI MUBARAK BELT ; NORTHERN THRUST ; NUBIAN SHIELD ; EVOLUTION ; DESERT ; DEFORMATION
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/2XILL650/314091
作者单位	1.King Saud Univ, SGSRC, Dept Geol, Fac Sci, POB 2455, Riyadh 11451, Saudi Arabia; 2.Taiz Univ, Dept Geol, Fac Sci, Taizi, Yemen; 3.Natl Res Ctr, Dept Geol, Al Behoos Str, Cairo 12622, Egypt
推荐引用方式 GB/T 7714	Mohammed, Lami Abdel Karim Nouaman,Kassem, Osama Mohamed Kaoud,Al Bassam, Abdel Aziz Mohamed. Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia[J]. King Saud University,2020,13(6).
APA	Mohammed, Lami Abdel Karim Nouaman,Kassem, Osama Mohamed Kaoud,&Al Bassam, Abdel Aziz Mohamed.(2020).Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia.ARABIAN JOURNAL OF GEOSCIENCES,13(6).
MLA	Mohammed, Lami Abdel Karim Nouaman,et al."Finite strain analysis for deformed Neoproterozoic rock associations of the Al Amar fault zone, Eastern Arabian Shield, Saudi Arabia".ARABIAN JOURNAL OF GEOSCIENCES 13.6(2020).