Mapping of the Distribution of Natural Gamma Radiation (NGR) Dose Rates in Mining Areas of Nassarawa Eggon, Nasarawa, North Central Nigeria

Authors

  • Ulu Jamus Ewuga
    Medical Physics
  • Ademoh Aisha Bello
    Federal University Lafia image/svg+xml
  • Zira Dlama Joseph
    Federal University Lafia image/svg+xml
  • Mnongo Stephen Orkaa
    Rev.Fr. Moses Orshio Adasu University
  • Joseph Daze Zumnan
    Karl Kumm University Vom

Keywords:

Dose Rate, Isodose Map, Mean Dose Rate, Natural Gamma Radiation

Abstract

Natural background gamma radiation (NGR), primarily from terrestrial radionuclides uranium, thorium, and potassium, significantly contributes to human radiation exposure, with a global average effective dose of 2.4 mSv per year (UNSCEAR, 2000). Geological composition, particularly granitic rocks, influences higher NGR dose rates, necessitating localized studies to assess environmental and health impacts. This study investigates NGR levels in Nasarawa Eggon, Nasarawa State, Nigeria, an area with increasing mining activities and population growth. Using a certified Geiger-Müller counter, 150 in-situ measurements were conducted across Agidi, Akun, and Nasarawa Eggon development areas, with dose rates converted to nGy/h. The mean dose rate was 171.26 nGy/h, exceeding twice the global average of 59 nGy/h, with Agidi recording the highest (184.88 nGy/h). An isodose map, generated using QGIS and Kriging interpolation, illustrated NGR distribution. Calculated annual effective doses were 0.84 mSv (indoor) and 0.21 mSv (outdoor), below the ICRP’s 1 mSv limit but above Nigerian and global averages. These findings highlight elevated NGR levels linked to local geology and mining, underscoring the need for further radiological studies to identify contributing radionuclides and ensure public safety.

Dimensions

Abba, H. T., Saleh, M. A., Hassan, W. M. S. W., Aliyu, A. S., & Ramli, A. T. (2017). Mapping of natural gamma radiation (NGR) dose rate distribution in tin mining areas of Jos Plateau, Nigeria. Environmental Earth Sciences, 76(5), p. 1–9. https://doi.org/10.1007/s12665-017-6534-8

Abdullahi, A. (2017). The Impact of Climate Change on the Political Economy of Food Production, A Study of Nassarawa Eggon LGA of Nasarawa State, Nigeria. IOSR Journal of Humanities and Social Science (IOSR-JHSS), 22(11), 63-71.

Ademola J (2008) Exposure to high background radiation level in the tin mining area of Jos Plateau, Nigeria. J Radiol Prot 28:93

Adiuku-Brown M (1999) The dangers posed by the abandoned mine ponds and Lotto mines on the Jos Plateau. J Environ Sci 3:258–265

Agbalagba, E.O., Osimobi, J.C. & Avwiri, G.O. Excess Lifetime Cancer Risk from Measured Background Ionizing Radiation Levels in Active Coal Mines Sites and Environs. Environ. Process. 3, 895–908 (2016). https://doi.org/10.1007/s40710-016-0173-z

Agbalagba, E.O., Osimobi, J.C. & Avwiri, G.O. Excess Lifetime Cancer Risk from Measured Background Ionizing Radiation Levels in Active Coal Mines Sites and Environs. Environ. Process. 3, 895–908 (2016). https://doi.org/10.1007/s40710-016-0173-z

Aliyu AS, Mousseau TA, Ramli AT (2015) Preliminary investigation of the radioecological impacts of tin mining in Jos Nigeria, Is there an issue of environmental concern (in press)

Al-Jundi J (2002) Population doses from terrestrial gamma exposure in areas near to old phosphate mine, Russaifa, Jordan. Radiat Meas 35:23–28

Al-Masri M, Amin Y, Hassan M, Ibrahim S (2006) External gamma radiation dose to Syrian population based on the measurement of gamma-emitters in soils. J Radioanal Nucl Chem 267:337–343

Amadi A, Okoye N, Olasehinde P, Okunlola I, Alkali Y, Ako T, Chukwu J (2012) Radiometric survey as a useful tool in geological mapping of Western Nigeria. J Geogr Geol 4:242

Anagnostakis M, Hinis E, Simopoulos S, Angelopoulos M (1996) Natural radioactivity mapping of Greek surface soils. Environ Int 22:3–8

Apriantoro N (2008) Radiological study in perak state and its radiological health impact. Universiti Teknologi Malaysia Doctor of Philosophy Thesis

Aziz Saleh M, Termizi Ramli A, Alajerami Y, Damoom M, Sadiq Aliyu A (2014) Assessment of health hazard due to natural radioactivity in Kluang District, Johor, Malaysia. Isot Environ Health Stud 50:103–113

Baykara O, Dog˘ru M (2009) Determination of terrestrial gamma, 238 U, 232 Th and 40 K in soil along fracture zones. Radiat Meas 44:116–121

Buchanan M, Macleod W, Turner D, Berridge N, Black R (1971) The geology of the Jos Plateau Younger granite complexes. Bull Geol Surv Nigeria 2(32):67–106 Dosim 18:39–41

Evans, A.M. (1980). An Introduction to Ore Geology, Blackwell Scientific Publications, Oxford OXS OBW, England. Pp.10-30

Faanu A et al (2016) Natural radioactivity levels in soils, rocks and water at a mining concession of Perseus gold mine and surrounding towns in Central Region of Ghana. SpringerPlus 5:98

Farai I, Jibiri N (2000) Baseline studies of terrestrial outdoor gamma dose rate levels in Nigeria. Radiat Prot Dosimetry 88:247–254

Faure G (1986) Principles of isotope geology, 2nd edn. Wiley, London. ISBN 0471864129

Freitas A, Alencar A (2004) Gamma dose rates and distribution of natural radionuclides in sand beaches—Ilha Grande, Southeastern Brazil. J Environ Radioact 75:211–223

Furukawa M, Shingaki R (2012) Terrestrial gamma radiation dose rate in Japan estimated before the 2011 Great East Japan Earthquake. Radiat Emerg Med 1:11–16

Garba N, Ramli A, Saleh M, Sanusi M, Gabdo H (2015) Terrestrial gamma radiation dose rates and radiological mapping of Terengganu state, Malaysia. J Radioanal Nucl Chem

Gerrard J (2000) Fundamentals of soils. Psychology Press, London

Grant F (1982) Gamma ray spectrometry for geological mapping and for prospecting. In: Mining geophysics workshops,

Hassan A, Raji B, Malgwi W, Agbenin J (2015) The basaltic soils of Plateau State, Nigeria: properties, classification and management practices. J Soil Sci Environ Manag 6:1–8

Ibeanu IGE (2003) Tin mining and processing in Nigeria: cause for concern? J Environ Radioact 64:59–66

J. G. Laah and E. Ayiwulu (2010). Sociodemographic characteristics of patients diagnosed with HIV/AIDS in Nasarawa Eggon. Asian J. Med. Sci., 2(3), 114-120.

Jibiri N (2001) Assessment of health risk levels associated with terrestrial gamma radiation dose rates in Nigeria. Environ Int 27:21–26

Jibiri N, Alausa S, Farai I (2009) Assessment of external and internal doses due to farming in high background radiation areas in old tin mining localities in Jos-plateau, Nigeria. Radioprotection 44:139–151

Jibiri N, Farai I, Alausa S (2007a) Activity concentrations of 226Ra, 228Th, and 40 K in different food crops from a high background radiation area in Bitsichi, Jos Plateau, Nigeria. Radiat Environ Biophys 46:53–59

Jibiri N, Farai I, Alausa S (2007b) Estimation of annual effective dose due to natural radioactive elements in ingestion of foodstuffs in tin mining area of Jos-Plateau, Nigeria. J Environ Radioact 94:31–4

Jibiri N, Isinkaye M, Bello I, Olaniyi P (2016) Dose assessments from the measured radioactivity in soil, rock, clay, sediment and food crop samples of an elevated radiation area in south-western Nigeria. Environ Earth Sci 75:107

Jwanbot D, Izam M, Nyam G, John H (2013) Radionuclides analysis of some soils and food crops in Barkin Ladi LGA, Plateau StateNigeria. J Environ Earth Sci 3:79–86

Jwanbot D, Izam M, Nyam G, Yusuf M (2014) Indoor and outdoor gamma dose rate exposure levels in major commercial building materials distribution outlets in Jos, Plateau State-Nigeria. Asian Rev Environ Earth Sci 1(1):5–7

Karahan G, Bayulken A (2000) Assessment of gamma dose rates around Istanbul (Turkey). J Environ Radioact 47:213–221

Kebwaro J, Rathore I, Hashim N, Mustapha A (2011) Radiometric assessment of natural radioactivity levels around Mrima Hill, Kenya. Int J Phys Sci 6:3105–3110

Kinta District, Perak, Malaysia. J Environ Radioact 100:368–374

Knoll GF (2010) Radiation detection and measurement. Wiley, London

Kurnaz A (2013) Background Radiation Measurements and Cancer Risk Estimates for S¸ebinkarahisar, Turkey. Radiat Prot Dosimetry 6:1–10

Lee SK (2007) Natural background radiation in the Kinta District, Perak Malaysia. Universiti Teknologi Malaysia, Faculty of Science

Lee SK, Wagiran H, Ramli AT, Apriantoro NH, Wood AK (2009) Radiological monitoring: terrestrial natural radionuclides in Kinta District, Perak, Malaysia. J Environ Radioact 100:368–374

Mollah A, Rahman M, Koddus M, Husain S, Malek M (1987) Measurement of high natural background radiation levels by TLD at Cox’s Bazar coastal areas in Bangladesh. Radiat Prot

NGSA (1956) Geological formations of Jos Plateau, Naraguta (sheet 168): prepared British Government’s Dept of Technical Cooperation Under the Special commonwealth African Assistance Plan Bases Map prepared from DCS 30 by Director of Federal Survey, Nigeria, 1956

NPC (2006) National population Commission (NPC): provisional of 2006 Census Results

Obaje, N.G., Lar, U.A., Nzegbuna, A.I., Moumouni, A., Chaanda, M.S. and Goki, N.G. (2006). Geology and mineral resources of Nasarawa state: An Investor Guide. Nasara Scientifique 2, 1-34

Ofomola, O. M., Ugbede, F. O., & Anomohanran, O. (2023). Environmental risk assessment of background radiation, natural radioactivity and toxic elements in rocks and soils of Nkalagu quarry, Southeastern Nigeria. Journal of Hazardous Materials Advances, 10, 100288.

Olise FS, Oladejo OF, Almeida SM, Owoade OK, Olaniyi HB, Freitas MC (2014) Instrumental neutron activation analyses of uranium and thorium in samples from tin mining and processing sites. J Geochem Explor 142:36–42

Onwuka, J. C., Nwaedozie, J. M., & Terna, P. T. (2020). Fertility Status of Selected Agricultural Soils Along Major Roads in Nasarawa Eggon and Doma Areas of Nasarawa State, North Central, Nigeria. Journal of Chemical Society of Nigeria, 45(4).pp 1311–1327

Ramli A (2007) Radiology study on effect of amang in perak state UTM-AELB Final report of research project Vot, 68876

Ramli AT, Apriantoro NH, Wagiran H (2009) Assessment of radiation dose rates in the high terrestrial gamma radiation area of Selama District, Perak, Malaysia. Appl Phys Res 1:45

Ravisankar R, Chandramohan J, Chandrasekaran A, Jebakumar JPP, Vijayalakshmi I, Vijayagopal P, Venkatraman B (2015) Assessments of radioactivity concentration of natural radionuclides and radiological hazard indices in sediment samples from the East coast of Tamilnadu, India with statistical approach. Mar Pollut Bull 97:419–430

Saleh MA, Ramli AT, Alajerami Y, Aliyu AS (2013a) Assessment of environmental 226 Ra, 232 Th and 40 K concentrations in the region of elevated radiation background in Segamat District, Johor, Malaysia. J Environ Radioact 124:130–140

Saleh MA, Ramli AT, Alajerami Y, Aliyu AS, Basri NAB (2013b) Radiological study of Mersing District, Johor, Malaysia. Radiat Phys Chem 85:107–117

Sanusi M, Ramli A, Gabdo H, Garba N, Heryanshah A, Wagiran H, Said M (2014) Isodose mapping of terrestrial gamma radiation dose rate of Selangor state, Kuala Lumpur and Putrajaya, Malaysia. J Environ Radioact 135:67–74

Shittu, H. O., Olarinoye, I. O., Kolo, M. T., Amadi, A. N., Olukotun, S. F., Oladejo, O. F., & Samuel, G. E. (2021). Mapping of natural gamma radiation (NGR) dose rate distribution around gidan-kwano area, minna, North-Central Nigeria. FUW Trends in Science & Technology Journal,e-ISSN: 24085162; p-ISSN: 20485170: Vol. 6 No. 3 pp. 931 – 936

Sohrabi M (1998) The state-of-the-art on worldwide studies in some environments with elevated naturally occurring radioactive materials (NORM). Appl Radiat Isot 49:169–188

Taskin H, Karavus M, Ay P, Topuzoglu A, Hidiroglu S, Karahan G (2009) Radionuclide concentrations in soil and lifetime cancer risk due to gamma radioactivity in Kirklareli, Turkey. J Environ Radioact 100:49–53

Tzortzis M, Svoukis E, Tsertos H (2004) A comprehensive study of natural gamma radioactivity levels and associated dose rates from surface soils in Cyprus. Radiat Prot Dosim 109:217–224

Ugodulunwa F, Ukpong R, Ongbatabo A, Onazi B (2008) Radiation and other environmental hazards of mining: focus on Jos Plateau

UNSCEAR (1988) Sources, effects and risk of ionizing radiation. UNSCEAR United Nations, New York

UNSCEAR (1993a) Sources, effects and risks of ionising radiation. UNSCEAR, United Nations, New York

UNSCEAR (1993b) Report to the general assembly with scientific annexes. UNSCEAR, New York

UNSCEAR (1998) Sources, effects and rsik of ionizing radiation. United Nation Scientific Commitee on the Effect of Atomic Radiation. New York, United Nations

UNSCEAR (2000) Sources and effects of ionizing radiation. United Nations, New York

UNSCEAR (2008) Sources and effects of ionizing radiation. UNSCEAR, New York

Published

2025-09-22

How to Cite

Ewuga, U. J., Bello, A. A., Joseph, Z. D., Orkaa, M. S., & Zumnan, J. D. (2025). Mapping of the Distribution of Natural Gamma Radiation (NGR) Dose Rates in Mining Areas of Nassarawa Eggon, Nasarawa, North Central Nigeria. Nigerian Journal of Physics, 34(3), 106-116. https://doi.org/10.62292/10.62292/njp.v34i3.2025.437

Issue

Vol. 34 No. 3 (2025): Nigerian Journal of Physics - Vol. 34 No. 3

Section

Articles
Copyright & Licensing

How to Cite

Ewuga, U. J., Bello, A. A., Joseph, Z. D., Orkaa, M. S., & Zumnan, J. D. (2025). Mapping of the Distribution of Natural Gamma Radiation (NGR) Dose Rates in Mining Areas of Nassarawa Eggon, Nasarawa, North Central Nigeria. Nigerian Journal of Physics, 34(3), 106-116. https://doi.org/10.62292/10.62292/njp.v34i3.2025.437

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