Year 2019, Volume 5 , Issue 2, Pages 214 - 223 2019-07-31

Nijerya'nın Güneybatı Temel Kompleks Bölgesinde Yüzeye Çıkan Granit Kayaların Doğal Radyoaktivite ve Radyolojik Tehlikelerinin Yerinde Değerlendirilmesi
In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria

Adedibu Sunny Akingboye [1] , Omowumi Ademila [2]


Kaya materyallerinden kaynaklanan radyoaktif emisyon (gama ışını) insanlara ve çevresine tehdit oluşturur. Bu nedenle, Nijerya'nın Güneybatı Temel Kompleksi'nde iki farklı bölgeden yüzeye çıkan granit kayalar ile bunların kalıntısı olan toprakların doğal radyoaktivite ve radyolojik tehlike endeksleri Gamma-ray spektrofotometre kullanılarak değerlendirilmiştir. Bu çalışmada, granit yapıdaki kayaların doğal radyasyon düzeylerinin ve bağlantılı radyolojik tehlikelerin çalışma alanında yaşayan ve gama ışınına maruz kalan insanlar üzerindeki etkilerinin belirlenmesi amaçlanmıştır. Veriler, taşınabilir Gamma-ray Spektrometresi kullanılarak her biri 200 m’lik altı jeofizik travers boyunca 5 m’lik istasyon aralığı ile toplanmıştır. 40K, 238U ve 232Th için temel ve aktivite konsantrasyonlarının ağırlıklı ortalama değerlerinin sonuçları sırasıyla %2.00 ± 1.43, 3.13 ± 0.90 ppm, 12.32 ± 4.99 ppm ve 629.28 ± 447.29, 38.58 ± 11.02, 49.96 ± 20.23  dir. Elde edilen U/Th (1.32) ve Th/U (2.14) ortalama konsantrasyon oranları, sırasıyla, genel standart oranları olan 0.26’dan yüksek ve 3.5’tan düşüktür. Aktivite konsantrasyonları ve konsantrasyon oranlarındaki artış, yüzeye çıkan granit kayalarda radyoaktif minerallerin zenginleştiği anlamına gelebilir. Çalışma alanında yaşayan insanlar için gamma ışını maruziyetinde uygulanan yıllık dış ve iç etkili dozları dünyanın izin verilen 1  standardının altında olduğundan, alan radyolojik olarak güvenlidir. Bununla birlikte, AGDE ve ELCR'nin tahmini ortalamaları olan 525.620  ve 1.273 x10-3 değerlerindeki artışın, izin verilen 300  ve 0.29 x10-3 standart miktarların üzerinde olması da ciddi radyolojik tehditler anlamına gelmemelidir. Bu nedenle, alanın ve kayaların radyoaktivite seviyesinin sürekli izlendiği kontrol önlemleri tatbik edilmelidir.


Radioactive emission (gamma ray) emanating from rock materials constitutes threats to humans and their environment. Hence, the natural radioactivity and radiological hazard indices of some granite gneiss outcrops with their residual soils from two different localities within the Southwestern Basement Complex of Nigeria were assessed using Gamma-ray spectrometry. The study aimed at determining the natural radiation levels of granite gneissic rocks and associated radiological threats to people living in the study area from gamma ray exposure. Data were collected along six geophysical traverses of 200 m each with station spacing of 5 m using the portable hand-held Gamma-ray Spectrometer. The results of weighted mean values of the elemental and activity concentrations for 40K, 238U, and 232Th are 2.00 ± 1.43%, 3.13 ± 0.90 ppm, 12.32 ± 4.99 ppm and 629.28 ± 447.29, 38.58 ± 11.02, 49.96 ± 20.23  respectively. The obtained mean concentration ratios of 1.32 for U/Th and 2.14 for Th/U were higher than 0.26 and lower than 3.5 global standard ratios respectively. The increase in activity concentrations and concentration ratio may have suggested the enrichment of radioactive minerals in the granite gneissic rocks. The annual outdoor and indoor effective doses of gamma ray exposure for people living in the study area were below the world permissible standard of 1 , thus, the area is radiologically safe. However, increase in estimated mean of AGDE and ELCR; 525.620  and 1.273  above the world permissible standards of 300  and  respectively does not translate to significant radiological threats. Therefore, control measure by constant monitoring of the radioactivity levels of the area and rocks should be practiced.


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Primary Language en
Subjects Geosciences, Multidisciplinary
Published Date 2019
Journal Section Research Articles
Authors

Orcid: 0000-0003-2195-6098
Author: Adedibu Sunny Akingboye (Primary Author)
Institution: Adekunle Ajasin University
Country: Nigeria


Orcid: 0000-0001-5177-1110
Author: Omowumi Ademila
Institution: Adekunle Ajasin University
Country: Nigeria


Dates

Publication Date : July 31, 2019

Bibtex @research article { dacd475998, journal = {Doğal Afetler ve Çevre Dergisi}, issn = {}, eissn = {2528-9640}, address = {}, publisher = {Artvin Çoruh University}, year = {2019}, volume = {5}, pages = {214 - 223}, doi = {10.21324/dacd.475998}, title = {In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria}, key = {cite}, author = {Akingboye, Adedibu Sunny and Ademila, Omowumi} }
APA Akingboye, A , Ademila, O . (2019). In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria. Doğal Afetler ve Çevre Dergisi , 5 (2) , 214-223 . DOI: 10.21324/dacd.475998
MLA Akingboye, A , Ademila, O . "In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria". Doğal Afetler ve Çevre Dergisi 5 (2019 ): 214-223 <http://dacd.artvin.edu.tr/en/issue/43935/475998>
Chicago Akingboye, A , Ademila, O . "In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria". Doğal Afetler ve Çevre Dergisi 5 (2019 ): 214-223
RIS TY - JOUR T1 - In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria AU - Adedibu Sunny Akingboye , Omowumi Ademila Y1 - 2019 PY - 2019 N1 - doi: 10.21324/dacd.475998 DO - 10.21324/dacd.475998 T2 - Doğal Afetler ve Çevre Dergisi JF - Journal JO - JOR SP - 214 EP - 223 VL - 5 IS - 2 SN - -2528-9640 M3 - doi: 10.21324/dacd.475998 UR - https://doi.org/10.21324/dacd.475998 Y2 - 2019 ER -
EndNote %0 Doğal Afetler ve Çevre Dergisi In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria %A Adedibu Sunny Akingboye , Omowumi Ademila %T In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria %D 2019 %J Doğal Afetler ve Çevre Dergisi %P -2528-9640 %V 5 %N 2 %R doi: 10.21324/dacd.475998 %U 10.21324/dacd.475998
ISNAD Akingboye, Adedibu Sunny , Ademila, Omowumi . "In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria". Doğal Afetler ve Çevre Dergisi 5 / 2 (July 2019): 214-223 . https://doi.org/10.21324/dacd.475998
AMA Akingboye A , Ademila O . In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria. DACD. 2019; 5(2): 214-223.
Vancouver Akingboye A , Ademila O . In situ natural radioactivity and radiological hazard assessments of granite gneiss outcrops in parts of the Southwestern Basement Complex of Nigeria. Doğal Afetler ve Çevre Dergisi. 2019; 5(2): 223-214.