TITLE:
Study of the Geothermal Potential of the Locality of Kaladi and Its Surroundings (Adamawa-Cameroon) from the Frequency Processing of Magnetic Data
AUTHORS:
Ndam Njikam Mohamed Moustapha, Meying Arsène, Zanga Amougou Alain, Abdou Raouf, Nkemndem Agendia Demianus
KEYWORDS:
Spectral Analysis, Curie Point Depth, Heat Flow, Geothermal Gradient
JOURNAL NAME:
International Journal of Geosciences,
Vol.13 No.11,
November
17,
2022
ABSTRACT: The aim of this study is to
estimate the variations in curie point depth, geothermal gradient and heat flux
from the frequency analysis of magnetic data in order to evaluate the
geothermal potential of the Kaladi locality and its surroundings. For this
purpose, the magnetic field map was first reduced to equator (RTE). The
centroid method was used to divide the RTE grid into a set of 40 blocks. The
spectral analysis applied to each block allowed determining the depth to top (Zt), center (Z0) and bottom (Zb also called
curie point depth or CPD) of the magnetic sources. Knowing the different CPD,
the geothermal gradient associated with each block was calculated. The heat
flow was then calculated from the geothermal gradient associated with the
anomaly block considered. From the set of values obtained for each block, maps
of geothermal gradient and heat flow variations were established. Analysis of
these maps shows that the sectors that could be favourable for geothermal
exploration are the north of Kaladi and the Goro-Bembara corridor, because they
show variations in the geothermal gradient and heat flow between 0.4 and 0.8℃/m
and between 1.2 and 2 mW/m2 respectively. In addition, the
superposition of the different hot springs highlighted in previous studies with
areas of high geothermal gradient and heat flow values supports this analysis.
The proposed models can be used as background documents for any geothermal
exploration project in the study area.