Structural Investigation of Udi LGA of Enugu State, South Eastern Nigeria Using High Resolution Bouguer Gravity and Landsat Data

Main Article Content

C. N. Nwankwo
E. C. Ene

Abstract

The focus of this study is to investigate the structures peculiar in Udi, Enugu State, Nigeria. This was achieved by delineating the regional from the residual, determining the lateral and sedimentary thicknesses of causative structures with their lateral boundaries and corresponding lineaments. Regional-residual separation was employed on the aerogravity dataset while Georeferencing and creation of new coordinate system was undertaken on the Landsat data. Causative sources with short and long wavelength trending in the NE-SW, NNE-SSW, E-W, WNW-ESE, N-S and NW-SE directions were found to exist within the study area as qualitative analysis was applied on the aerogravity and landsat data. The NE-SW and NW-SE trends are possible oil and gas rich belt within the area. Quantitatively, two depth source models D1 and D2 were identified. D1 depicting depth to deeply seated sources varies from 0.00071 to 0.0044 km with true thickness of 0.01 km. The shallow related sources expressed using D2 lies between 0.0014 to 0.0034 km with true value of 0.0005 km. If other conditions like structural features and depth parameters are met, a true sedimentary thickness of 0.01 km shows that the area will encourage mineral and water exploration rather than hydrocarbon exploration. 

Keywords:
Structural, landsat, aeromagnetic, gravity, Udi.

Article Details

How to Cite
Nwankwo, C. N., & C. Ene, E. (2020). Structural Investigation of Udi LGA of Enugu State, South Eastern Nigeria Using High Resolution Bouguer Gravity and Landsat Data. Asian Journal of Research and Reviews in Physics, 3(1), 17-32. Retrieved from http://journalajr2p.com/index.php/AJR2P/article/view/30112
Section
Original Research Article

References

Ugbor DO, Okeke FN. Geophysical investigation in the lower Benue trough of Nigeria, using gravity method. Internat. Jour. Phys. Sci. 2010;5(11):1757- 1769.

Ogala JE. Hydrocarbon potential of the upper cretaceous coal and shale units in the Anambra basin, Southeastern Nigeria. Petroleum and Coal. 2011;53(1):35-44.

Onuba LN, Audu GK, Chiaghanam OI, Anakwuba EK. Evaluation of aeromagnetic anomalies over Okigwe area, Southern Nigeria. Res. J. Environ. Earth Sci. 2011; 3(5):498‒507.

Adetona AA, Abu M. Investigating the structures within the lower Benue and Upper Anambra Basins, Nigeria, using First Vertical Derivative, Analytical Signal and (CET) Center for Exploration Targeting Plug-in. Earth Sci.2013;2(5):35-40.

Igwesi ID, Umego NM. Interpretation of aeromagnetic anomalies over some parts of lower Benue trough using spectral analysis technique. Int. J. Sci. Technol. Res. 2013;2(8):153–165.

Ugwu GZ, Eze PO, Ezeh CC. Interpretation of aeromagnetic data over Okigwe and Afikpo areas of lower Benue trough, Nigeria. Internat. Res. Jour. Geol. Min. 2013;3(1):1-8.

Ezema PO, Eze ID, Ugwu GZ, Abudullahi UA. Hydrocarbon and mineral exploration in Abakaliki, Southeastern Nigeria. Int. J. Eng. Sci. 2014;3(1):24‒30.

Kearey P, Brooks MI. An introduction to geophysical exploration (2nd edn). Blackwell Publishers, London. 2002;162-166.

Sultan AS, Josef P. Delineating groundwater aquifer and subsurface structures using integrated geophysical interpretation at the western part of Gulf of Aqaba, Sinai, Egypt. International Journal of Water Resources and Arid Environment. 2014;3(1):51-62.

Ozebo VC, Nwodo MU. Interpretation of high resolution aeromagnetic data over Nsukka and Udi areas of Enugu State, Nigeria. Trends in Science and Technology Journal. 2017;2(1):182-187.

Xu XF, Deng YY, He ZX. Application of magnetic directional derivatives in petroleum geology interpretation. EAGE 69th Conference & Exhibition, London, UK; 2007.

Onu NN, Opara AI, Oparaku OI. Geological interpretation of the aeromagnetic data over the lower Benue Trough and some adjoining areas. 47th Annual International Conference of Nigerian Mining and Geoscience Society (NMGS), Programmes and Book of Abstracts. 2011;43.

Onwe IM, Odoh BI, Onwe RM. Estimation of sedimentary thickness in eastern Anambra basin by qualitative and quantitative interpretation of aeromagnetic data. Advances in Applied Science Research. 2015;6(10):1-6.

Daniel NO, Ossai MN, Okwoli E. A case study of aeromagnetic data interpretation of Nsukka area, Enugu State, Nigeria, for hydrocarbon exploration. International Journal of Physical Sciences. 2015;10 (17):503-519.

Romanus OJ. Estimation of ground water recharge, in Udi local government Enugu state Nigeria. International Journal of Earth Science Research. 2014;2(2):112-117.

Obi GC, Okogbue CO, Nwajide CS. Evolution of the Enugu Cuesta: A tectonically driven erosional process. Global Journal Pure Applied Sciences. 2001;7(2):321-330.

Murat RC. Stratigraphy and palaeography of the cretaceous and lower tertiary in Southern Nigeria, (3rd edn). African Geology, University of Ibadan, Nigeria. 1972;251-266.

Reijers TJ, Petters SW, Nwajide CS. The Niger Delta Basin. African Basins--Sedimentary basin of the world 3, Amsterdam. 1997;151-172.
Available:www.Researchgate.net
(Acessed 20th October, 2019)

Dobrin MB, Savit CH. Introduction to geophysical prospecting, 4th ed. McGRAW-HILL book company NY; 1988.

Onyewuchi RA, Ugwu SA. Geological interpretation of high resolution aeromagnetic data over Okigwe-Udi area, Anambra Basin, Nigeria, Using 3D Euler Deconvolution and 2D Spectral Inversion Methods. Journal of Geography, Environment and Earth Science International. 2017;10(1):1-22.

Ijeh B. Ohaegbuchu H, Okpetue P. Integration of aeromagnetic data and landsat imagery for structural analysis. A case study of Awgu in Enugu State, South-Eastern Nigeria. World News of Natural Sciences. 2018;18(2):79-105

Ugwu S, Nwankwo C, Nmeanoh D. Investigation of subsurface structure for the evaluation of hydrocarbon potential using aeromagnetic data from Mmaku and its environs South-East Nigeria. Journal of Scientific and Engineering Research. 2017;4(9):152–164.