TITLE:
Determination of the Structural Lineaments in the Kribi-Campo-Ma’an Area from a Multi-Scale Analysis of Gravity Data Using the HGM and Euler 3D Deconvolution Approaches
AUTHORS:
Owona Angue Marie Louise Clotilde, Assembe Stephane Patrick, Njingti Nfor, Ngoh Jean Daniel, Ndougsa Mbarga Theophile, Kue Petou Rokis, Bisso Dieudonné
KEYWORDS:
Gravity Anomaly, Lineament, Kribi-Campo Fault, Dip
JOURNAL NAME:
International Journal of Geosciences,
Vol.7 No.9,
September
30,
2016
ABSTRACT: With the aim to produce a detailed structural map and
then enhance the geological information of the south-western Cameroon, a field gravity study is carried
out in the Kribi-Campo-Ma’an area (SW Cameroon). This study area is assumed to
undergo pending active tectonics as witnessed by several earthquakes [1]. Besides, the area has been affected by some shears
that gave rise to many major faults including the Kribi-Campo Fault (KCF). This
N-S lineament is an active fault corresponding to the NW margin of the CC [2] [3] and related to the
development of the Kribi-Campo basin. The gravity data analysis enables to highlight many deeply-seated structural features trending in the NE, NNE,
N-S, NNW, NW and E-W directions in this region. The NW-SE trend is more
strongly developed than the other identified trends and could have deeply
affected the major NNE structure. The NNE-SSW to N-S fractures and faults which
are local relays of the Kribi-Campo fault are related to the Kribi shear zone.
The fairly good clustering observed on local maxima of the horizontal gradient
magnitude enables to suggest that the contacts outlined have vertical
to subvertical dips. However, a probable interpretation of these features is
that they are vertical to subvertical faults which follow the aforementioned
directions. The location of the study area in the gulf of Guinea suggests that
it sustains tectonics related both to the equatorial and the
south Atlantic oceans opening.