文章基本信息

标题：Subsurface Investigation of Western Part of Zamfara Using Aeromagnetic Data
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作者：Dalhatu B ; Bonde D.S ; Abbas M 等
期刊名称：International Journal of Advances in Engineering and Management
电子版ISSN：2395-5252
出版年度：2022
卷号：4
期号：1
页码：642-654
DOI：10.35629/5252-0401447456
语种：English
出版社：IJAEM JOURNAL
摘要：The study area falls within the basement complex of northwestern Nigeria and covers four adjacent quarter degree sheets of Gandi (sheet 30), Kauran namoda (sheet 31), Anka (sheet 52) and Maru (sheet 53),which covers the area under consideration. some of the published geophysical investigation on mineralization in the area used the old aeromagnetic data with relevant techniques. Hence with the provision of high resolution aeromagnetic data sets, subsurface investigation survey needs to be carried out in order to identify more areas of possible mineral deposit. Nigeria depend or operates on petroleum based economy, however , as gradually the petroleum is devaluating due to continuous exploitation , it is income to the country . Solid mineral sector has been one of the high income earners for many countries. The aim and objective of this research is to delineate and identify the mineralization zones in the basement complex in western part of Zamfara in Nigeria. This was achieved by determining depth to basement, producing a total magnetic intensity map showing magnetic susceptibility range across the entire study area, and a model of the shape, location and depth of structures in the study area. The anomalies on the aeromagnetic map were defined by fitting a first order polynomial to the total fields, by the method of least squares to obtain the residual field data. First vertical derivative and analytic signal computed, defined distinct pattern of the magnetic signatures. Depths to the surface of the geologic structures were obtained from Euler deconvolution solutions which gives an average depths range of248.28 m to 1679.57 m, with very few solutions having depths less than 300 m. The most prominent lineament and all major subtle lineaments have a depth range of 200 m to 600 m which shows that the structures are deep seated.