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321083

THE ROLE OF EXTREME FRACTIONATION IN THE FORMATION OF RARE METALS: A CASE STUDY FROM GABAL DARA GRANITE AND CO-GENETIC PEGMATITES, NORTH EASTERN DESERT, EGYPT

Article

Last updated: 29 Dec 2024

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Subjects

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Tags

Geochemistry

Abstract

The granite of Gabal Dara, North Eastern Desert of Egypt, grades to the pegmatites along its boundaries, which are ranging from small pockets to large bodies with lenticular and irregular shapes in the concerned granite. Among them, three main pegmatite bodies display different degrees of enrichment in Zr, Nb, Th, U and REEs. The rare-metal mineralization is essentially composed of zircon and ishikawaite, while uranothorite and allanite-Ce are recorded as inclusions in them. A geochemical comparison among the Gabal Dara granite, barren and mineralized pegmatites indicated that they are exhibiting similar geochemical signatures; however, the mineralized pegmatites are more fractionated than the investigated granite. The Gabal Dara granite and pegmatites are highly fractionated rocks with pronounced alkaline affinity and extensive fractional crystallization. Extreme fractionation from granite to pegmatites is leading to the accumulation of the rare metals in some parts of the highly evolved pegmatites.

DOI

10.21608/asge.2022.321083

Keywords

fractionation, Rare Elements, Gabal Dara Granite, Pegmatites, Alkaline Affinity

Authors

First Name

A.

Last Name

Abdel Hamid

MiddleName

A.

Affiliation

Nuclear Materials Authority, Cairo, Egypt

Email

amr_ahamid@yahoo.com

City

-

Orcid

-

Volume

39

Article Issue

39

Related Issue

43653

Issue Date

2022-07-01

Receive Date

2023-10-12

Publish Date

2022-07-01

Page Start

43

Page End

56

Print ISSN

1110-0435

Article File

ASGE_Volume 39_Issue 39_Pages 43-56.pdf

PDF . 2.0MB

Link

https://agse.journals.ekb.eg/article_321083.html

Detail API

https://agse.journals.ekb.eg/service?article_code=321083

Order

321,083

Type

Original Article

Type Code

2,803

Publication Type

Journal

Publication Title

Annals of the Geological Survey of Egypt

Publication Link

https://agse.journals.ekb.eg/

MainTitle

THE ROLE OF EXTREME FRACTIONATION IN THE FORMATION OF RARE METALS: A CASE STUDY FROM GABAL DARA GRANITE AND CO-GENETIC PEGMATITES, NORTH EASTERN DESERT, EGYPT

Details

Type

Article

Created At

20 Dec 2024