Geo-morphological mapping of the basin configuration of parts of southern Nupe Basin, Nigeria, using high resolution aeromagnetic and core drill dataset

نوع مقاله : مقاله پژوهشی‌

نویسندگان

1 Alex Ekwueme Federal University, Department of Geology/Geophysics, Ndufu-Alike, Ebonyi, Nigeria

2 Nnamdi Azikiwe University, Department of Applied Geophysics, Awka, Nigeria

چکیده

Aeromagnetic and core drilled data covering parts of southern Nupe Basin was acquired and interpreted with the view of evaluating the mineral potential of the area through interpretation of the structural features in the area, determination of the Curie isotherm depth, and correlation of aeromagnetic outcomes with the core sample data from the area. Two major regional fault trends were interpreted: northeast–southwest (NE–SW) and NNE–SSW with minor northwest–southeast (NW–SE) directions. Two depth sources in the area are delineated, namely zone of shallow seated basement which ranges from 0.42 km to 1.5 km and zone of deeply seated basement ranging from 1.91 to 3.50 km. Results of qualitative interpretation of the total magnetic intensity map (TMI) and residual intensity map reveal that the magnetic intensities range from 7500 to 8460 nano-Tesla (nT) and -220 to 240 nT, respectively. The depths to the centroid and top of the magnetic causative bodies range from 9.00 to 17.10 km and 0.4 to 3.10 km, respectively. There are evidences of oolitic iron ore in some parts of the study area. Juxtaposing the topographical and core drilling data reveal that the oolitic iron ore level follows the topographical level which implies that the topography of the area controls the configuration of the iron ore deposit level. All these deductions are made considering the geology of the area.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Geo-morphological mapping of the basin configuration of parts of southern Nupe Basin, Nigeria, using high resolution aeromagnetic and core drill dataset

نویسندگان [English]

  • Ayatu Ojonugwa Usman 1
  • Ifeanyi Augustine Chinwuko 2
  • George-Best Azuoko 1
  • Amobi Chigozie Ekwe 1
  • Ema Michael Abraham 1
  • Joshua Chima Chizoba 1
1 Alex Ekwueme Federal University, Department of Geology/Geophysics, Ndufu-Alike, Ebonyi, Nigeria
2 Nnamdi Azikiwe University, Department of Applied Geophysics, Awka, Nigeria
چکیده [English]

Aeromagnetic and core drilled data covering parts of southern Nupe Basin was acquired and interpreted with the view of evaluating the mineral potential of the area through interpretation of the structural features in the area, determination of the Curie isotherm depth, and correlation of aeromagnetic outcomes with the core sample data from the area. Two major regional fault trends were interpreted: northeast–southwest (NE–SW) and NNE–SSW with minor northwest–southeast (NW–SE) directions. Two depth sources in the area are delineated, namely zone of shallow seated basement which ranges from 0.42 km to 1.5 km and zone of deeply seated basement ranging from 1.91 to 3.50 km. Results of qualitative interpretation of the total magnetic intensity map (TMI) and residual intensity map reveal that the magnetic intensities range from 7500 to 8460 nano-Tesla (nT) and -220 to 240 nT, respectively. The depths to the centroid and top of the magnetic causative bodies range from 9.00 to 17.10 km and 0.4 to 3.10 km, respectively. There are evidences of oolitic iron ore in some parts of the study area. Juxtaposing the topographical and core drilling data reveal that the oolitic iron ore level follows the topographical level which implies that the topography of the area controls the configuration of the iron ore deposit level. All these deductions are made considering the geology of the area.

کلیدواژه‌ها [English]

  • Basin geometry
  • Core data
  • Spectral analysis
  • Curie isotherm
  • Oolitic Iron ore

مراجع

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مجله ژئوفیزیک ایران
دوره 17، شماره 3
مهر و آبان 1402
صفحه 91-110

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