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Lineament, Qualitative Interpretation and Depth Evaluation of Potential Field Signatures in the Abeokuta Region, Southwestern Nigeria | ||
| فیزیک زمین و فضا | ||
| مقاله 4، دوره 49، شماره 4، اسفند 1402، صفحه 37-55 اصل مقاله (2.45 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jesphys.2023.358877.1007525 | ||
| نویسندگان | ||
| Gideon Oluyinka Layade* 1؛ Hazeez Owolabi Edunjobi2؛ Kehinde Daniel Ajayi1 | ||
| 1Department of Physics, College of Physical Sciences, Federal University of Agriculture, Abeokuta, Nigeria. | ||
| 2Department of Physics, Sikiru Adetona College of Education, Science and Technology, Omu-Ajose, Nigeria. | ||
| چکیده | ||
| Ground gravity and magnetic geophysical surveys are proven veritable tool in the imagery of the subsurface through the analyses of their responses (potential field data). This research attempts to delineate subsurface linear structures that are possible conduits for mineral accumulation at a 2,500 m2 active exploration site of FUNAAB, Abeokuta region. Abeokuta is embayed in the Dahomey Basin comprising of magmatic older granites of Precambrian age to early Paleozoic age. The qualitative interpretation technique employed by visualizing the grids reveals variations in density contrasts and susceptibilities, which connote the lithological distribution of the basement. Areas of high gravity and magnetic values directly correspond to areas of high density bodies and magnetically susceptible mineral contents, respectively. While the lows and steep discontinuities of both gravity and magnetic maps predict possible entrapments of mineral accumulation in the study area. The depth evaluation techniques employed are Peter’s Half Slope Method (PHSM) and 3D Euler deconvolution, showing the magnetic depths to basement range as 3.18 m to 5.88 m for PHSM and 1.00 m to 4.43 m for 3D Euler deconvolution. The gravity depth to basement reveals 7.03 m to 14.72 m for PHSM and 0.96 m to 4.13 m for 3D Euler deconvolution. The average depth results obtained clearly show that the study location is composed of shallow depth intrusive sources. | ||
| کلیدواژه‌ها | ||
| Lineament؛ Potential field data؛ Qualitative؛ Peter’s Half Slope Method (PHSM)؛ Deconvolution | ||
| عنوان مقاله [English] | ||
| Lineament, Qualitative Interpretation and Depth Evaluation of Potential Field Signatures in the Abeokuta Region, Southwestern Nigeria | ||
| نویسندگان [English] | ||
| Gideon Oluyinka Layade1؛ Hazeez Owolabi Edunjobi2؛ Kehinde Daniel Ajayi1 | ||
| 1Department of Physics, College of Physical Sciences, Federal University of Agriculture, Abeokuta, Nigeria. | ||
| 2Department of Physics, Sikiru Adetona College of Education, Science and Technology, Omu-Ajose, Nigeria. | ||
| چکیده [English] | ||
| Ground gravity and magnetic geophysical surveys are proven veritable tool in the imagery of the subsurface through the analyses of their responses (potential field data). This research attempts to delineate subsurface linear structures that are possible conduits for mineral accumulation at a 2,500 m2 active exploration site of FUNAAB, Abeokuta region. Abeokuta is embayed in the Dahomey Basin comprising of magmatic older granites of Precambrian age to early Paleozoic age. The qualitative interpretation technique employed by visualizing the grids reveals variations in density contrasts and susceptibilities, which connote the lithological distribution of the basement. Areas of high gravity and magnetic values directly correspond to areas of high density bodies and magnetically susceptible mineral contents, respectively. While the lows and steep discontinuities of both gravity and magnetic maps predict possible entrapments of mineral accumulation in the study area. The depth evaluation techniques employed are Peter’s Half Slope Method (PHSM) and 3D Euler deconvolution, showing the magnetic depths to basement range as 3.18 m to 5.88 m for PHSM and 1.00 m to 4.43 m for 3D Euler deconvolution. The gravity depth to basement reveals 7.03 m to 14.72 m for PHSM and 0.96 m to 4.13 m for 3D Euler deconvolution. The average depth results obtained clearly show that the study location is composed of shallow depth intrusive sources. | ||
| کلیدواژه‌ها [English] | ||
| Lineament, Potential field data, Qualitative, Peter’s Half Slope Method (PHSM), Deconvolution | ||
| مراجع | ||
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