Beta
ManageSearchChatDiscover
220863

NEOPROTEROZOIC TECTONO-METAMORPHIC EVOLUTION OF HAFAFIT DOME "A" AND THE ABUTTING SHAIT OPHIOLITIC MÉLANGE DOMAIN AT GABEL MUDARGAG AREA, CENTRAL EASTERN DESERT, EGYPT

Article

Last updated: 28 Dec 2024

OverviewSimilar Items

Subjects

-

Tags

Geology

Abstract

The Mudargag area, 740 km2 builds up two Neoproterozoic tectono-stratigraphic units separated by a NW trending subhorizontal thrust plane along which deformed rocks from both units are confined. The lower infrastructural unit is represented by the northern dome "A" of Wadi Hafafit culmination which forms a macroscopic oval-shaped asymmetrical antifromal domal structure with a fold axis extends over 10 km in a NW-SE direction. It is differentiated into four structural subunits composed of interlayered sequences, mainly of para-granite gneisses, psammitic gneisses and para-amphibolites with medium to high-grade metamorphic facies. Granite gneisses and psammitic gneisses dominate the lower and the upper subunits, respectively, para-amphibolites dominate the second subunit, whereas the third subunit has subequal proportions of psammitic gneisses and amphibolites. The upper suprastructural unit is represented by Shait ophiolitic mélange domain (SOMD), which comprises deformed normally faulted thin-skinned napped sequence of low-grade metamorphosed volcano-sedimentary island-arc type assemblages incorporating dismembered ophiolite and partially carbonated serpentinite fragments. Petrographic examinations carried out on both dome "A" and SOMD show distinct evidences of polyphase deformation (D1-D3) in addition to tow metamorphic events (M1-M2). Field data revealed that the exhumation of the Hafafit culmination domes to which the present dome "A" is considered and the large-scale crustal extension of SOMD run within a left-lateral dominated transpressional wrenching of Najd Shear System

DOI

10.21608/aunj.2020.220863

Keywords

Mudargag, Hafafit, infrastructural, suprastructural, Shait ophiolitic mélange

Volume

49

Article Issue

1

Related Issue

31477

Issue Date

2020-06-01

Receive Date

2022-02-21

Publish Date

2020-06-01

Page Start

1

Page End

25

Print ISSN

2812-5029

Online ISSN

2812-5037

Article File

AUNJ_Volume 49_Issue 1_Pages 1-25.pdf

PDF . 2.1MB

Link

https://aunj.journals.ekb.eg/article_220863.html

Detail API

https://aunj.journals.ekb.eg/service?article_code=220863

Order

220,863

Type

Novel Research Articles

Type Code

2,242

Publication Type

Journal

Publication Title

Assiut University Journal of Multidisciplinary Scientific Research

Publication Link

https://aunj.journals.ekb.eg/

MainTitle

NEOPROTEROZOIC TECTONO-METAMORPHIC EVOLUTION OF HAFAFIT DOME "A" AND THE ABUTTING SHAIT OPHIOLITIC MÉLANGE DOMAIN AT GABEL MUDARGAG AREA, CENTRAL EASTERN DESERT, EGYPT

Details

Type

Article

Created At

23 Jan 2023