Published

2023-11-10

An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)

Acercamiento integrado de métodos avanzados para el mapeo de estructuras geológicas y espesor sedimentario en Ukelle y regiones adyacentes, en el sudeste de Nigeria

DOI:

https://doi.org/10.15446/esrj.v27n3.105868

Keywords:

Edge detection, Tilt-depth, Geologic structures, Ukelle, Southeast Nigeria (en)
detección de bordes, método de inclinación y profundidad, estructuras geológicas, Ukelle, Sudeste de Nigeria (es)

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Authors

  • Stephen E. Ekwok Applied Geophysics Programme, Department of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, Nigeria
  • Ahmed M. Eldosouky Department of Geology, Suez University, Suez, 43518, Egypt
  • Ubong C. Ben Department of Geology, University of Calabar, PMB 1115, Calabar, Cross River State, Nigeria
  • Ogiji-Idaga M. Achadu Department of Geology, University of Calabar, PMB 1115, Calabar, Cross River State, Nigeria
  • Anthony E. Akpan Applied Geophysics Programme, Department of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, Nigeria
  • Abdullah Othman Department of Environmental Engineering, Umm Al-Qura University, Makkah, Saudi Arabia
  • Luan Thanh Pham University of Science

High-resolution aeromagnetic data were enhanced using recent and advanced filters to map the geologic structures of the Ukelle and adjoin region (Southeast Nigeria). Aeromagnetic data were reduced to the equator (RTE) and upward continued to 100 m. Subsequently, enhancement operations like the tilt angle of the horizontal gradient (TAHG), logistic function of the horizontal gradient (LTHG), and fast sigmoid function (FSED) operations were carried out. The results from these filters indicated that the ENE-WSW, NE-SW, NNE-SSW, and NNW-SSE orientations dominate the structural pattern of the Ukelle region. In addition, the edge filters delineated NE-SW trending synclinal structures that match the location of thick (500-1400 m) sedimentation obtained by the tilt-depth (TD) method. Furthermore, the structural map obtained from remote sensing data validated the lineament orientations and position of the NE-SW trending synclinal structure. The results also showed that the study location’s southeastern and northwestern flanking portions, controlled by extensive Santonian igneous intrusions and metamorphisms, are characterized by high lineaments and thin (0-500 m) sedimentation. The observed thin sedimentation is believed to be caused by widespread Santonian tectonic events in the area. At the same time, related geologic structures served as migration pathways and accumulation zones for rift mineralization.  

En este trabajo se usaron filtros recientes y avanzados para mejorar la información aeromágnetica de alta resolución que permitiera mapear las estructuras geológicas de Ukelle y las regiones con las cuales limita (en el sudeste de Nigeria). A la información aeromagnética se le aplicó la Reducción al Ecuador y continuó hasta los 100 metros. Luego se realizaron operaciones de mejoría como el ángulo de inclinación del gradiente horizontal, función logística del gradiente horizontal, y la función rápida sigmoide. Los resultados obtenidos con estos filtros indicaron que las orientaciones ENE-OSO, NE-SO, NNE-SSO y NNO-SSE dominan el patrón estructural de la región Ukelle. Adicionalmente, los filtros de borde delinearon que la tendencia NE-SO de las estructuras sinclinales coinciden con la ubicación de la densa masa sedimentaria (entre 500 y 1400 metros) obtenida con el método de inclinación y profundidad. Además, el mapa structural obtenido con la información de teledetección validó las orientaciones de lineamiento y la tendencia en la posición de NE-SO de la estructura sinclinal. Los resultados también muestran que las áreas del sureste y del noroeste que flanquean la zona de estudio están controladas por grandes intrusiones y metaformismo ígneo del Santoniano y se caracterizan por grandes lineamientos y sedimentación delgada (0-500 metros). Se estima que la sedimentación delgada que se observó fue causada por los extendidos eventos tectónicos durante el Santoniano en el área. Simultáneamente, las estructuras geológicas relacionadas sirvieron como caminos de migración y zonas de acumulación para la mineralización en zanjas de hundimiento.

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How to Cite

APA

Ekwok, S. E., Eldosouky, A. M., Ben, U. C., Achadu, O.-I. M., Akpan, A. E., Othman, A. and Pham, L. T. (2023). An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria). Earth Sciences Research Journal, 27(3), 251–258. https://doi.org/10.15446/esrj.v27n3.105868

ACM

[1]
Ekwok, S.E., Eldosouky, A.M., Ben, U.C., Achadu, O.-I.M., Akpan, A.E., Othman, A. and Pham, L.T. 2023. An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria). Earth Sciences Research Journal. 27, 3 (Nov. 2023), 251–258. DOI:https://doi.org/10.15446/esrj.v27n3.105868.

ACS

(1)
Ekwok, S. E.; Eldosouky, A. M.; Ben, U. C.; Achadu, O.-I. M.; Akpan, A. E.; Othman, A.; Pham, L. T. An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria). Earth sci. res. j. 2023, 27, 251-258.

ABNT

EKWOK, S. E.; ELDOSOUKY, A. M.; BEN, U. C.; ACHADU, O.-I. M.; AKPAN, A. E.; OTHMAN, A.; PHAM, L. T. An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria). Earth Sciences Research Journal, [S. l.], v. 27, n. 3, p. 251–258, 2023. DOI: 10.15446/esrj.v27n3.105868. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/105868. Acesso em: 8 may. 2024.

Chicago

Ekwok, Stephen E., Ahmed M. Eldosouky, Ubong C. Ben, Ogiji-Idaga M. Achadu, Anthony E. Akpan, Abdullah Othman, and Luan Thanh Pham. 2023. “An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)”. Earth Sciences Research Journal 27 (3):251-58. https://doi.org/10.15446/esrj.v27n3.105868.

Harvard

Ekwok, S. E., Eldosouky, A. M., Ben, U. C., Achadu, O.-I. M., Akpan, A. E., Othman, A. and Pham, L. T. (2023) “An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)”, Earth Sciences Research Journal, 27(3), pp. 251–258. doi: 10.15446/esrj.v27n3.105868.

IEEE

[1]
S. E. Ekwok, “An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)”, Earth sci. res. j., vol. 27, no. 3, pp. 251–258, Nov. 2023.

MLA

Ekwok, S. E., A. M. Eldosouky, U. C. Ben, O.-I. M. Achadu, A. E. Akpan, A. Othman, and L. T. Pham. “An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)”. Earth Sciences Research Journal, vol. 27, no. 3, Nov. 2023, pp. 251-8, doi:10.15446/esrj.v27n3.105868.

Turabian

Ekwok, Stephen E., Ahmed M. Eldosouky, Ubong C. Ben, Ogiji-Idaga M. Achadu, Anthony E. Akpan, Abdullah Othman, and Luan Thanh Pham. “An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria)”. Earth Sciences Research Journal 27, no. 3 (November 10, 2023): 251–258. Accessed May 8, 2024. https://revistas.unal.edu.co/index.php/esrj/article/view/105868.

Vancouver

1.
Ekwok SE, Eldosouky AM, Ben UC, Achadu O-IM, Akpan AE, Othman A, Pham LT. An integrated approach of advanced methods for mapping geologic structures and sedimentary thickness in Ukelle and adjoining region (Southeast Nigeria). Earth sci. res. j. [Internet]. 2023 Nov. 10 [cited 2024 May 8];27(3):251-8. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/105868

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1. Stephen E Ekwok, Ahmed M Eldosuoky, Edward A Thompson, Romeo A Ojong, Anthony M George, Saad S Alarifi, Sherif Kharbish, Peter Andráš, Anthony E Akpan. (2024). Mapping of geological structures and sediment thickness from analysis of aeromagnetic data over the Obudu Basement Complex of Nigeria. Journal of Geophysics and Engineering, 21(2), p.413. https://doi.org/10.1093/jge/gxae012.

2. Hayder Adnan Al-Bahadily, Ali Maki Al-Rahim, Richard Stuart Smith. (2024). Tectonic elements and structural framework deduced from magnetic data of the Southern Desert, Iraq. Pure and Applied Geophysics, https://doi.org/10.1007/s00024-024-03460-w.

3. Pabalelo Sono, Ame Thato Selepeng, Hideki Mizunaga, Felicia Akinyemi. (2024). Geological mapping and mineral exploration in Francistown region, north east Botswana from integration of ASTER TIR and aeromagnetic data. Journal of African Earth Sciences, 214, p.105270. https://doi.org/10.1016/j.jafrearsci.2024.105270.

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