High heat flow inferred from analysis of high resolution aeromagnetic data of south-western Nigeria

被引：0

作者：

Nwankwo, Levi, I ^{[1
]}

Aoudia, Abdelkrim ^{[2
]}

Fawale, Oluwakorede ^{[3
]}

机构：

[1] Fed Univ Kashere, Geophys Unit, Dept Phys, Gombe, Nigeria

[2] Abdus Salam Int Ctr Theoret Phys, Earth Syst Phys Sect, Trieste, Italy

[3] Fed Polytech, Dept Sci Technol, Ado Ekiti, Ekiti State, Nigeria

来源：

JOURNAL OF INDIAN GEOPHYSICAL UNION | 2020年 / 24卷 / 05期

关键词：

Heat-flow; high resolution aeromagnetic data; south-western Nigeria; Power spectra analysis; CURIE-POINT DEPTHS; MAGNETIC-ANOMALIES; SPECTRAL-ANALYSIS; SURFACE;

D O I：

暂无

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A high heat flow has been inferred from the power spectra analysis of recently acquired high resolution aeromagnetic (HRAM) data of south-western Nigeria. The HRAM data, bounded by latitudes 6.5 degrees N and 9.0 degrees N and longitudes 4.0 degrees E and 6.5 degrees E, were divided into sixteen overlapping blocks of 110 x 110 km and each block analysed to evaluate the depth to bottom of magnetic sources (DBMS). The pieces of DBMS information were subsequently used to estimate ensuing heat flow parameter in the study area. The results revealed DBMS values ranging from 10.48 to 19.87 km while heat flow values range between 72.97 and 138.36 mWm(-2). The results also demonstrate that about 37.5 % of the area is dominated with heat flow greater than 100 mWm(-2). Heat flow in the neighbourhood of 100 mWm(-2) and above is considered anomalous and are likely due to active tectonic activities, therefore it is expected that areas with such anomalous elevated heat-flow be monitored closely.

引用

页码：1 / 7

页数：7

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