Arid
DOI10.1007/s12517-017-3250-3
Exploration for iron ore in Agbado-Okudu, Kogi State, Nigeria
Olasunkanmi, Nurudeen Kolawole1; Bamigboye, Olufemi S.2; Aina, Adebayo1
通讯作者Olasunkanmi, Nurudeen Kolawole
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
出版年2017
卷号10期号:24
英文摘要

This report details the result of geophysical exploration for iron ore; which involved vertical magnetic intensity (AZ) and gravity measurements, to delineate the geometry and depth extent of the deposit and acquiring quantitative and qualitative information for pre-drilling purposes in Agbado-Okudu. It is located about 3 km from Jakura along Lokoja-Jakura marble quarry and within low latitude precambrian basement complex district of Kogi State, Nigeria. A total of 517 magnetic measurement points along 16 traverses and 330 gravity reading along 11 profiles on the deposit in northeast-southwest azimuth were undertaken. The magnetic and gravity data enhancement involved linear regression curve fitting and fast Fourier transform, which were used to construct residual magnetic (RM) and gravity (RG) anomalies, analytic signal amplitude, Euler deconvolution at varying spectral indices (SI), power spectrum, and source parameter image (SPI), using the submenu of Geosoft Oasis Montaj software. Interpretation of the RBI and RG anomalies revealed a primary causative body which perfectly correlates the positive anomalies and iron ore deposit, in form of a horizontal or gently dipping dyke with strike length of 600 m and average width of 110-130 m, within the gneiss complex in the north and trending south of the area. A secondary causative body associated with the negative anomalies and inferred as a vertical/near vertical thin sheet striking northeast-southwest coincided with the granitic and quartzitic intrusion. The NW-SE and E-W lineament trend conformed Kibarian and Liberian orogeny cycles of generally known structural trends in Nigeria, which shows that the iron ore deposit is structurally controlled. Depths to sources were estimated within range <= 2-24 m and 37.5-60 m, regarded as shallow and relatively deep depths, respectively. Ten vertical boreholes ranging in depth between 50 and 100 m are recommended, five of which require a priority attention to ascertain the thickness of the primary causative body.


英文关键词Iron ore deposit Magnetic and gravity anomalies Primary and secondary causative bodies Dyke Lineament Vertical boreholes
类型Article
语种英语
国家Nigeria
收录类别SCI-E
WOS记录号WOS:000419041400018
WOS关键词MAGNETIC DATA ; AEROMAGNETIC DATA
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197512
作者单位1.Kwara State Univ, Dept Phys & Mat Sci, Malete, Kwara State, Nigeria;
2.Kwara State Univ, Dept Geol & Mineral Sci, Malete, Kwara State, Nigeria
推荐引用方式
GB/T 7714
Olasunkanmi, Nurudeen Kolawole,Bamigboye, Olufemi S.,Aina, Adebayo. Exploration for iron ore in Agbado-Okudu, Kogi State, Nigeria[J],2017,10(24).
APA Olasunkanmi, Nurudeen Kolawole,Bamigboye, Olufemi S.,&Aina, Adebayo.(2017).Exploration for iron ore in Agbado-Okudu, Kogi State, Nigeria.ARABIAN JOURNAL OF GEOSCIENCES,10(24).
MLA Olasunkanmi, Nurudeen Kolawole,et al."Exploration for iron ore in Agbado-Okudu, Kogi State, Nigeria".ARABIAN JOURNAL OF GEOSCIENCES 10.24(2017).
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