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369023

Geotectonic implications of Neoproterozoic chromitite in the serpentinized peridotite of Al-Barramiya district, Eastern Desert, Egypt

Article

Last updated: 28 Dec 2024

Subjects

-

Tags

Earth and environmental sciences

Abstract

The present study deals with chromitite lenses and pods associated with the mantle section of Neoproterozoic Al-Barramiya ophiolite in the Eastern Desert of Egypt. The Al-Barramiya mantle section includes serpentinized peridotite-bearing chromitite bodies. Preserved textures in the serpentinite around chromitite include an abundance of mesh texture indicating dunite parentage that grades outwards to serpentinite with bastite texture indicating harzburgite parentage. Chromitite is commonly massive and grades to disseminated type. The interstitial minerals include serpentines, carbonates, and chlorite. Chrome spinel of the massive chromitite has higher Cr# (0.79-0.83) and low TiO2 (0.10-0.17 wt. %) consistent with boninitic parent magma that experienced high degrees of partial melt extraction in the forearc environment. The studied chromitite bodies display magmatic textures and have geochemical characteristics of boninite. This supports the role of melt–peridotite interaction and subsequent melt mixing in the SSZ environment. The process of mixing occurs between peridotite and boninite melts in a dunite conduit.

DOI

10.21608/nujbas.2024.280277.1022

Keywords

Chromitite, ophiolite, Serpentinized peridotite, forearc environment

Authors

First Name

Mahmoud

Last Name

Darwish

MiddleName

H.

Affiliation

Geology Department, Faculty of Science, New Valley University, El-Kharga 72511, Egypt

Email

mahmoud.hamed68@sci.nvu.edu.eg

City

-

Orcid

0000-0002-8930-6422

First Name

Amany

Last Name

Seddik

MiddleName

M.A.

Affiliation

Geology Department, Faculty of Science, New Valley University, El-Kharga 72511, Egypt

Email

amanyseddik7@gmail.com

City

El-kharga

Orcid

-

First Name

Mokhles

Last Name

Azer

MiddleName

K.

Affiliation

Geological Science Department, National Research Centre, El-Dokki 12622, Cairo, Egypt

Email

mokhles72@yahoo.com

City

-

Orcid

-

Volume

2

Article Issue

1

Related Issue

48252

Issue Date

2024-06-01

Receive Date

2024-03-29

Publish Date

2024-06-01

Page Start

37

Page End

46

Print ISSN

2812-4839

Online ISSN

2812-572X

Link

https://nujbas.journals.ekb.eg/article_369023.html

Detail API

https://nujbas.journals.ekb.eg/service?article_code=369023

Order

369,023

Type

Original papers

Type Code

2,186

Publication Type

Journal

Publication Title

New Valley University Journal of Basic and Applied Sciences

Publication Link

https://nujbas.journals.ekb.eg/

MainTitle

Geotectonic implications of Neoproterozoic chromitite in the serpentinized peridotite of Al-Barramiya district, Eastern Desert, Egypt

Details

Type

Article

Created At

28 Dec 2024