HR: 1330h
AN: NS23B-12    [Abstracts]
TI: Use of Aeromagnetics in Mineral/Structural Exploration in Nigeria.
AU: * NKwonta, I K
EM: aikay44@yahoo.com
AF: Nnamdi Azikiwe, University, Department of Geology, Awka, Ana
AU: Kene, P O
EM: p_kene@yahoo.com
AF: Nnamdi Azikiwe, University, Department of Geology, Awka, Ana
AB: Aeromagnetics surveys have been employed in discovering a number of oil fields.In this study, various graphical methods of aeromagnetic interpretation was employed in determining the depth to anomalous structure. The anomalies on which these methods were tested were taken from the lower Benue trough of Nigeria. The parameter estimated in this study was the depth to the buried magnetic source or structure. It was discovered that the depth to the top of the structure or source lies between 0.55Km and 9.20Km. The magnetic anomalies over parts of this trough could be explained by the existence of the intrusive bodies and elavation of crystalline basement. This work reconfirms the usefulness of some of the graphical methods of aeromagnetic interpretations especially when applied to isolated and non-interfering anomalies. Depths estimates from these work can be used as input for more detailed investigation of the anomalous bodies using more quantitative approaches.
DE: 8105 Continental margins and sedimentary basins
SC: Near-Surface Geophysics [NS]
MN: 2005 Joint Assembly