MEASUREMENTS OF VERTICAL GRADIENT OF GRAVITY IN ZARIA AREA OF KADUNA STATE, NIGERIA
MEASUREMENTS OF VERTICAL GRADIENT OF GRAVITY IN ZARIA AREA OF KADUNA STATE, NIGERIA
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Date
1991-02
Authors
OKONTA, ANTHONY DUMEBI
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Abstract
In this survey, the possibilty of using local materials
in the fabrication of a stool that could be used in taking
graviraeter readings at two vertically separated platforms
was investigated. It was also aimed at using the stool in
obtaining data to be used for the production of a vertical
gradient of gravity map for Zaria area of Kaduna State,
Nigeria.
A LaCoste - Romberg Gravimeter (model G512) was used to
obtain data for a total of 121 stations in the survey
area. The results of the measurements showed that the
vertical gradient of gravity in Zaria varies from 2700 to
3800E yielding a range of 1100E. A vertical gradient of
gravity contour map was then produced and correlated with
the existing geologic and gravity residual anomaly maps
for the same area.
An analysis of the correlation showed that the low
closures of the vertical gradient of gravity map
corresponds to the low closures of the residual anomaly
map. Since these low residual closures correspond to
important geologic features, then the low vertical
gradient of gravity closures bear a strong relationship
with the geology of the area. The correlation also
showed that a few oi the residual anomaly closures were
relatively displaced to the East when compared to the
corresponding low vertical gradient of gravity closures.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA, IN PARTIAL
FULFILMENT OF THE REQUIREMENTS FOR THE AWARD
OF THE DEGREE OF MASTER OF SCIENCE IN APPLIED
GEOPHYSICS.
DEPARTMENT OF PHYSICS
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA
Keywords
MEASUREMENTS, VERTICAL, GRADIENT, GRAVITY, ZARIA, AREA, KADUNA STATE, NIGERIA