Palaeoenvironmental reconstruction and oolitic ironstone mapping of the Agbaja Ironstone Formation in the Nupe Basin, North-central Nigeria: Insights from sedimentological and aeromagnetic analyses

Opeloye, S. A.; Amigun, John Olurotimi; Sanusi, Sherif Olumide; Alabi, Olujide

doi:10.1016/j.ringps.2021.100010

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…Therefore, the purpose of this study was to determine the distribution of iron sand in the Bawean Island area with a wider coverage using magnetic data obtained from satellites. The application of magnetic surveys has also been carried out by several previous researchers as follows [9][10][11][12][13][14].…”

Section: Figure 1 Geological Map Of the Study Areamentioning

confidence: 99%

The use of magnetic data from swarm satellite as an efforts to estimate the potential of iron sand in the south Bawean Island area

Widyawati

Susilo

Wiyono

et al. 2022

J. Phys.: Conf. Ser.

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This study describes the use of magnetic data obtained through the Swarm satellite and launched by the Europan space agency to estimate iron sand deposits in the southern part of Bawean Island, Gresik Regency. Data processing in this study was carried out using Microsoft Excel and Oasis Montaj software. The interpretation process in this study was carried out in two stages, namely the qualitative interpretation stage using contour residual anomaly maps and quantitative interpretation using 2D and 3D modeling. The interpretation results show that the aeromagnetic data used can be used as initial data in estimating sand deposits in the southern part of Bawean Island, Gresik Regency.

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Section: Figure 1 Geological Map Of the Study Areamentioning

confidence: 99%

The use of magnetic data from swarm satellite as an efforts to estimate the potential of iron sand in the south Bawean Island area

Widyawati

Susilo

Wiyono

et al. 2022

J. Phys.: Conf. Ser.

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“…Geological investigations often involved random sampling which does not ensure that the whole expanse of the area of interest is investigated. On the other hand, the use of airborne geophysical and remote sensing imagery ensures coverage of large area, which translates to extensive and detailed mineral exploration mapping (Akinlalu, 2023;Akinlalu et al, 2024) Furthermore, iron ore mineralization in the study area is predominantly of the Haematite type, which is not easily re ected on magnetic maps due to haematization process that makes the iron ore signature to resemble the country rocks signature (Amigun, 2015;Opeloye et al, 2021). Magnetite on the other hand as the most magnetic earth material is easily identi ed on magnetic maps (Olasunkanmi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Remote Sensing and Aeromagnetic Mapping for Iron Ore Mineralization in Parts of Kakanda and Its Environs, Northcentral Nigeria

Akinlalu

2024

Preprint

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Kogi State, Northcentral Nigeria has been known for its iron ore deposits and Kakanda village is one of those places that possess iron ore deposits. However, little information about the extent and locations of possible iron ore mineralized zone is available due to limited researches in that area. Hence, this study utilized aeromagnetic and Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) datasets for the delineation of Iron ore deposits in Kakanda Village and its environs. Enhancement techniques such as residual magnetic amplitude and analytic signal amplitude carried out on the aeromagnetic data revealed the concentration of iron ore deposits especially in the southern, eastern and western parts of the study area. This is consistent with signatures derived from other data enhancement techniques involving the total horizontal derivative, tilt derivative and 3D Euler deconvolution technique which were principally used to map structures guiding mineralization in the study area. Furthermore, analyses of the ASTER dataset using the true and false color composite and combination of band ratios indicate the occurrence of iron oxide and clay alterations relating to iron ore mineralization in the study area. It was observed that the signatures relating to iron ore mineralization of the aeromagnetic data and ASTER dataset are consistent with each other. The overlap of these signatures was used to produce the iron ore prospectivity map of the study area. The study showed that areas of delineated lineaments coincide with areas of iron ore mineralization. In the same vein, areas of dense lineaments coincide with areas of iron ore mineralization especially in the southern and eastern parts of the study area. The study area therefore concluded that mineralization in the study area is structurally controlled. Hence, further exploration activities should be focused on areas where there is an evident overlap of lineament and iron ore mineralization in the study area.

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“…Aeromagnetic techniques were also used for depth to magnetic origins in Nigeria's Nupe Basin. In the study area, the three sedimentary formations discovered include sandstone facies, claystone facies, and ooidal ironstones [6]. Source parameter imaging (SPI) was employed in estimating the depth to magnetic sources from the observed total magnetic field intensity.…”

Section: Introductionmentioning

confidence: 99%

“…Source parameter imaging (SPI) was employed in estimating the depth to magnetic sources from the observed total magnetic field intensity. The SPI was computed using the AS amplitude, local frequency, and phase [6]. Onyishi and Ugwu et al used Oasis Montaj and PotentQ software tools to compare the depth to magnetic source in the Benue Trough, Nigeria, using both Euler deconvolution and SPI techniques [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of aeromagnetic filtering techniques in locating the primary target in sedimentary terrain: A review

2021

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This article analyzes some aeromagnetic filtering techniques for mitigating deceptive geophysical conceptions that may result in a distorted range of geological information from aeromagnetic data. The implication of using the aeromagnetic method, data processing, and enhancement to distinguish sediment-produced anomalies was considered. Two methods to locate buried faults in aeromagnetic data were compared: Edge and fault detection were considered using the magnetic contrast and horizontal gradient methods, whereas rapid depth estimation was considered using the Euler deconvolution method and Signum method. The general challenge to find the magnetic anomaly depth and delineate edges relies on geophysical filtering techniques discussed in order to maintain its geological relevance. The magnetic-contrast layer model signatures help clarify the existence of intra-sedimentary faults. The horizontal gradient approach relative to other derivative methods has better noise stability and fast adaptation to grids without modifying parameters. However, the Signum transform (ST) approach offers a more special solution in depth estimation than the Euler’s deconvolution approach whose solution relies on the required choice of default shape parameters and windows. The Euler deconvolution procedure may not be able to detect structures found by the ST approach and vice versa. As a result, these techniques may be used in conjunction with one another during analysis, as complementary interpretation tools. This review will however aid in the analysis of information used as a criterion for determining faults using various analytical techniques like ST or Euler deconvolution.

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Palaeoenvironmental reconstruction and oolitic ironstone mapping of the Agbaja Ironstone Formation in the Nupe Basin, North-central Nigeria: Insights from sedimentological and aeromagnetic analyses

Cited by 9 publications

References 28 publications

The use of magnetic data from swarm satellite as an efforts to estimate the potential of iron sand in the south Bawean Island area

The use of magnetic data from swarm satellite as an efforts to estimate the potential of iron sand in the south Bawean Island area

Remote Sensing and Aeromagnetic Mapping for Iron Ore Mineralization in Parts of Kakanda and Its Environs, Northcentral Nigeria

Analysis of aeromagnetic filtering techniques in locating the primary target in sedimentary terrain: A review

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