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247392

Evaluation Of Gamma Activity Concentrations (226Ra, 232Th, 40K) And Related Potential Radiological Risks In Granitic Rocks From Nuweibi Mining Area, Egyptian Nubian Shield

Article

Last updated: 22 Jan 2023

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Abstract

In the present study, we focus on the activity concentrations of 226Ra, 232Th and 40K measured using HPGe in twenty-six (26) albite granite and granodiorite samples from the Nuweibi mining area in the central Eastern Desert between latitudes 25○ 11\ 30\\ to 25○ 12\ 35\\ N and longitudes 34○ 28\ 50\\ to 34○ 30\ 10\\ E, which is a part of the Egyptian Nubian Shield of Neoproterozoic age. The Nuweibi geology comprises an ophiolite assemblage (serpentinites and metagabbros), tuffaceous metasediments, syntectonic older granitoids (granodiorite and tonalite) and finally post-collisional younger granites (albite granite). The average activity concentrations were 11.2, 11.9 and 289 Bq/kg for 226Ra, 232Th and 40K in the granodiorite samples, and 42.2, 71.5 and 811 in the albite granites, respectively. Absorbed gamma dose rates (ADRA) were 24.50 nGy/h for granodiorites and 97.72 nGy/h for albite granites, and outdoor annual effective doses (AEDout) were 0.03 mSv/year for granodiorites, and 0.12mSv/year for albite granites, respectively. Calculated gamma absorbed dose rates in air and annual outdoor effective doses were also compared with literature in terms of health issues and environmental impacts of workable albite granite in the area of study.

DOI

10.21608/ajnsa.2022.122489.1553

Keywords

Nuweibi, albite granite, Nubian Shield, Natural radioactivity, HPGe spectroscopy, radiation risk assessment

Authors

First Name

Mohamed

Last Name

Heikal

MiddleName

Th. S.

Affiliation

Prof. of Petrology, Geology Department, Faculty of Science, Tanta University, Egypt

Email

mohamed.hekal1@scince.tantaedu.eg

City

Tanta

Orcid

-

First Name

Waleed

Last Name

Abddellah

MiddleName

M.

Affiliation

Prof. of Radioactivity, Radiation Protection Department, Nuclear and Radiological Regulatory Authority, Cairo, Egypt

Email

wmsra@yahoo.com

City

cairo

Orcid

0000-0002-4002-0191

First Name

Mohamed

Last Name

Kamar

MiddleName

-

Affiliation

Nuclear materials authority, Cairo, Egypt

Email

drkamar30@gmail.com

City

-

Orcid

-

First Name

Mohamed

Last Name

Ibrahim

MiddleName

Osama

Affiliation

Nuclear Materials Authority, Cairo, Egypt

Email

drmohamedosama92@gmail.com

City

El-Fayoum

Orcid

-

First Name

Mohamed

Last Name

Abd El Monsef

MiddleName

-

Affiliation

Geology Department, Faculty of Science, Tanta University

Email

monsef_egy@yahoo.com

City

-

Orcid

-

Volume

55

Article Issue

4

Related Issue

36991

Issue Date

2022-10-01

Receive Date

2022-02-18

Publish Date

2022-10-01

Page Start

79

Page End

91

Print ISSN

1110-0451

Online ISSN

2090-4258

Link

https://ajnsa.journals.ekb.eg/article_247392.html

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https://ajnsa.journals.ekb.eg/service?article_code=247392

Order

8

Type

Original Article

Type Code

455

Publication Type

Journal

Publication Title

Arab Journal of Nuclear Sciences and Applications

Publication Link

https://ajnsa.journals.ekb.eg/

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-

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Article

Created At

22 Jan 2023