TITLE:
Using Magnetic Method for the Identification of Anomalies Due to Kimberlite Pipes, Luando Area, Bié, Angola
AUTHORS:
Gerson Itembo, João Baptista, Ageu Cardoso
KEYWORDS:
Near-Surface Geophysical Study, Magnetic Anomalies, Kimberlite Pipes, Total Magnetic Field Anomalies, Analytic Signal Map
JOURNAL NAME:
International Journal of Geosciences,
Vol.11 No.11,
November
16,
2020
ABSTRACT: One of the measurement
geophysical methods to investigate kimberlite pipes is by using the magnetic
method. The acquired field data in this study uses two proton-precession magnetometers for the mapping of magnetic
anomalies due to kimberlites. Three different magnetic maps are obtained
from the result of total magnetic field data processing on Oásis Montaj
software programme. These maps include magnetic anomaly maps through
statistical analyses, total magnetic field intensity map and map of the analytic
signal. Based on the interpretation of these maps a structure is identified
with SWW-NEE directions in which magnetic signatures that indicate the presence
of kimberlite pipes are observed. As the interpretation of the magnetic
anomalies is a complicated process due to their dipolar nature, the analytic
signal is generated, where is possible to observe the typical shape of these
anomalies.