干旱区生态环境知识资源中心(Arid): Geology and evolutionary stages of the Late Precambrian Hammamat sediments at Gebel Um Tawat, North Eastern Desert, Egypt

Arid

DOI	10.1007/s12517-020-05323-9
	Geology and evolutionary stages of the Late Precambrian Hammamat sediments at Gebel Um Tawat, North Eastern Desert, Egypt
	Khalifa, Asmaa Adel 1; Khamis, Hossam Anwer 2; El-Sayed, Mohamed Mohamed 1; Shalaby, Mahmoud Hany 2
通讯作者	Khalifa, Asmaa Adel
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:12
英文摘要	The Um Tawat Late Precambrian immature molasse-type Hammamat sedimentary rocks, located in the Northern part of the Eastern Desert of Egypt, were deposited at the late stage evolution of the Pan-African Orogeny. The Um Tawat molasse sediments are mainly derived from Dokhan volcanics and rest unconformably on these volcanics. They are intruded by the younger granites of Sala'at El-Belih granites and Gebel Gattar batholith. Hammamat sediments consist of repeated cycles of conglomerates, sandstones, siltstones, and minor mudstones deposited in an inter-mountainous basin by braided stream and alluvial fan regime constituting a stratigraphic section of about 500 m thick. Petrographically, the conglomerates are of polymictic type. Sandstone could be termed arkosic greywacke and shows ripple marks and in some places cross bedding. Siltstone is characterized by clear lamination and graded bedding. Mudstone is characterized by very fine grains of silt and clay size particles. The evolutionary stages of the study area is divided into five stages: (1) compressional regime resulted in the formation of the metavolcanics and metagabbro-diorite complex; (2) tension and relaxation crustal regime and uplift of the old basement forming G. Dokhan; (3) relaxation period, weathering, and erosion processes of the Dokhan volcanics formed the Hammamat molasse-type sediments; (4) tensional regime or weak rift-like processes led to the eruption of the younger granites and (5) regional compressional deformation subjected to the Hammamat sediments. This phase form G. Um Tawat and forming one regional open anticline fold whose fold axis is trending N47 degrees E-S47 degrees W and plunges 5 degrees toward SW.
英文关键词	Eastern Desert Um Tawat Hammamat sediments Structure Geometrical analysis Tectonic evolution
类型	Article
语种	英语
国家	Egypt
收录类别	SCI-E
WOS记录号	WOS:000540267600002
WOS关键词	ARABIAN-NUBIAN SHIELD ; EL-URF AREA ; CRUSTAL EVOLUTION ; NEOPROTEROZOIC GRANITOIDS ; AFRICAN OROGEN ; GEOCHEMICAL CONSTRAINTS ; ZIRCON GEOCHRONOLOGY ; ISOTOPE GEOCHEMISTRY ; NORTHEASTERN DESERT ; OBLIQUE CONVERGENCE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318774
作者单位	1.Damanhour Univ, Fac Sci, Geol Dept, Bahira, Egypt; 2.Nucl Mat Author, Cairo, Egypt
推荐引用方式 GB/T 7714	Khalifa, Asmaa Adel,Khamis, Hossam Anwer,El-Sayed, Mohamed Mohamed,et al. Geology and evolutionary stages of the Late Precambrian Hammamat sediments at Gebel Um Tawat, North Eastern Desert, Egypt[J],2020,13(12).
APA	Khalifa, Asmaa Adel,Khamis, Hossam Anwer,El-Sayed, Mohamed Mohamed,&Shalaby, Mahmoud Hany.(2020).Geology and evolutionary stages of the Late Precambrian Hammamat sediments at Gebel Um Tawat, North Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,13(12).
MLA	Khalifa, Asmaa Adel,et al."Geology and evolutionary stages of the Late Precambrian Hammamat sediments at Gebel Um Tawat, North Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 13.12(2020).