DETAILED RESISTIVITY AND SEISMIC REFRACTION SURVEY OF MASARI/KAFUR KIMBERLITE PIPE AREA, NEAR MALUMFASHI, KADUNA STATE
DETAILED RESISTIVITY AND SEISMIC REFRACTION SURVEY OF MASARI/KAFUR KIMBERLITE PIPE AREA, NEAR MALUMFASHI, KADUNA STATE
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Date
1979-07
Authors
ONUGBA, ABRAHAM
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Abstract
Near Masari/Kafur in Kaduna state an intrusion suspected
to be a kimberlite pipe has been investigated using some
geophysical survey methods. The electrical resistivity
profiling technique delineated the pipe in details, while
electrical resistivity soundings and seismic refraction measurements
established the surficial layer structure of the pipe.
From these measurements it was deduced that the Masari/Kafur
kimberlite pipe is between 560 and 660 m long with a maximum
width of 140 m and is oriented in a direction east of NE.
The surface of the pipe is covered by 6.B m of soil and gravel
with seismic velocity ranging from 500 to 870 m/s and mean
resistivity of 210 ohm-m. The second layer has a seismic
velocity of 2000 to 2.60 m/s, a mean apparent resistivity
of about 13 o h m - m and a thickness range af 17 to 34 m.
The existence of a third layer was detected. It has n seismic
velocity between 3260 and 3450 m/s and average apparent resistivity
of over 1000 ohm-m.
Correlation of these results with previously measured
gravity and magnetic anomalies over the same pipe as well, as
with geophysical anomalies reported over known kimberlite
pipes in other parts of the world confirm that the Kafur/
Masari is indeed a kimberlite pipe.
Description
A 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
Keywords
DETAILED,, RESISTIVITY,, SEISMIC,, REFRACTION,, SURVEY,, MASARI/KAFUR,, KIMBERLITE,, PIPE AREA,, MALUMFASHI,, KADUNA STATE