GRAVITY SURVEY OF DUTSE COMPLEX IN KANO STATE
GRAVITY SURVEY OF DUTSE COMPLEX IN KANO STATE
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Date
1979-05
Authors
AMOSU, SENAPON NUKONNIYON
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Abstract
A gravity survey was carried cut over Dutse Complex,
Kano State for a total of six weeks during the months of
October and November 1977, February, July and August 1978.
The observed Bouguer anomaly showed that the area is
characterised by negative values ranging from -350 GU to
-c230 GU. The pattern of the contours on the Bouguer anomaly
map suggested that the anomaly might have been due to a
plug-like body, thus a computer programme for three dimensional
mass modelling was used for the interpretation.
It was also observed that the Dutse Complex is made
up of typical rocks of the Younger granite suite such as
Beiderbecke granite and theodolite with characteristic low
density values.
The three dimensional model studies suggest that the
Beiderbecke granite is a Pluto which is 4km in thickness
and about 14km in diameter buried at shallow depth of
about 0.5km. The surface expression of this Pluto is a
series of small cylindrical pipes of different radii
which serve as outlets of the magma at depth. The rhyolite
is probably the volcanic phase following the intrusion of
the per alkaline granites extruded through one of the pipes
within the granitic Pluto.
Description
THESIS SUBMITTED TO THE AHMADU BELLO UNIVERSITY, IN
PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD
OF THE DEGREE OF:-
MASTER OF SCIENCE IN APPLIED GEOPHYSICS
DEPARTMENT OF PHYSICS
Ahmadu BELLO UNIVERSITY
ZARIA, NIGERIA.
MAY, 1979.
Keywords
GRAVITY,, SURVEY,, DUTSE,, COMPLEX,, KANO STATE.