Choice of suitable regional and residual gravity maps,the case of the South-West Cameroon zone

Fidèle Koumetio; Donatien Njomo; Constant Tatchum Noutchogwe; Eric Ndoh Ndikum; Sévérin Nguiya; Alain-Pierre Kamga Tokam

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Choice of suitable regional and residual gravity maps,the case of the South-West Cameroon zone

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The quantitative interpretation of gravity anomalies due to shallow structures needs separation between long wavelength anomalies(regional anomalies)and short wavelength anomalies(residual anomalies).The regional-residual field separation can be carried out using the polynomial method.In this case,the so-called regional field of order n is treated as a polynomial of degree n.The present study shows that the degree n must vary between a smallest value nmin and a maximum value nmax.This article presents a method to process gravity data that allows determination of nmin and nmax for a given study area.We apply the method to gravity data of the South-West Cameroon zone.In this chosen study area,we find that regional anomaly maps of orders ranging from 1 to 9 and residual anomaly maps of orders ranging from 1 to 8 can be used for suitable interpretation.The analyses show that one may need residual anomaly maps of several orders to perform satisfactory quantitative interpretation of the different intrusive bodies found in a given area.

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《地球与行星物理:英文版》 |2019年第1期|P.26-32|共7页
作者
Fidèle Koumetio; Donatien Njomo; Constant Tatchum Noutchogwe; Eric Ndoh Ndikum; Sévérin Nguiya; Alain-Pierre Kamga Tokam;
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作者单位

Department of Physics Faculty of Science University of Dschang PO Box 67 Dschang Cameroon;

Department of Physics Faculty of Science University of Yaounde I Cameroon;

Department of Physics ENS Bambili University of Bamenda Cameroon;

Department of Fundamental Sciences H.T.T.T.C.Bambili-Bamenda University of Bamenda Cameroon;

Department of Physics Faculty of Genial Engineering University of Douala Cameroon;

Department of Physics Faculty of Science University of Yaounde I Cameroon;

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原文格式 PDF
正文语种 chi
中图分类天文学、地球科学;
关键词
gravity; regional anomaly; residual anomaly; upward continuation; correlation factors; intrusive body;

机译：重力;区域异常;残余异常;向上延续;相关因子;侵入体;

Choice of suitable regional and residual gravity maps,the case of the South-West Cameroon zone

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