Using Gravity Data to Highlight Tectonic Faults with Filtering Techniques and Modelling at the Congo Craton-Pan-African Belt Contact, East Cameroon  

作　　者：Owono Amougou Olivier Ulrich Igor Ngoumou Paul Claude Mono Jean Aimé Ngoa Embeng Steve Bidichael Wahile Gouet Daniel Hervé Ndougsa Mbarga Theophile Owono Amougou Olivier Ulrich Igor;Ngoumou Paul Claude;Mono Jean Aimé;Ngoa Embeng Steve;Bidichael Wahile;Gouet Daniel Hervé;Ndougsa Mbarga Theophile(Department of Environmental Engineering, National Advanced School of Public Works, Yaound, Cameroon;Advanced School of Mines Processing and Energy Resources, University of Bertoua, Bertoua, Cameroon;School of Geology and Mining Engineering, University of Ngaoundr, Ngaoundr, Cameroon;Department of Basic Training, Higher Technical Teachers Training College (ENSET), University of Douala, Douala, Cameroon;Department of Textile and Clothing Industries, Higher Technical Teachers Training College (ENSET), University of Douala, Douala, Cameroon;Department of Physics, Faculty of Science, University of Yaound I, Yaound, Cameroon;Department of Mine and Career, Faculty of Mine and Petroleum Industry, University of Maroua, Maroua, Cameroon;Department of Physics, Advanced Teachers Training College, University of Yaound I, Yaound, Cameroon)

机构地区：[1]Department of Environmental Engineering, National Advanced School of Public Works, Yaound, Cameroon [2]Advanced School of Mines Processing and Energy Resources, University of Bertoua, Bertoua, Cameroon [3]School of Geology and Mining Engineering, University of Ngaoundr, Ngaoundr, Cameroon [4]Department of Basic Training, Higher Technical Teachers Training College (ENSET), University of Douala, Douala, Cameroon [5]Department of Textile and Clothing Industries, Higher Technical Teachers Training College (ENSET), University of Douala, Douala, Cameroon [6]Department of Physics, Faculty of Science, University of Yaound I, Yaound, Cameroon [7]Department of Mine and Career, Faculty of Mine and Petroleum Industry, University of Maroua, Maroua, Cameroon [8]Department of Physics, Advanced Teachers Training College, University of Yaound I, Yaound, Cameroon

出　　处：《International Journal of Geosciences》2024年第12期1087-1112,共26页地球科学国际期刊(英文)

摘　　要：The geological and tectonic impact of the collision between the Congo Craton and the Pan-African Ridge of Central Africa was considerable, with the formation of various tectonic faults, fractures, dykes and folds. The present gravity analysis is based on the analysis of EGM 2008 gravity data using different operators. Oasis Montaj software was used to process the data. The Bouguer anomaly map was used to identify the main local and regional anomalies. In addition, maps of the horizontal and vertical gradients of the Tilt angle analytical signal revealed several short-wavelength anomalies such as folds, dykes, fractures and faults. The map of superimposed maxima was used to create the structural map of the study area. For its part, the quantitative study provided an opportunity to assess the depths at which the anomalies originated. The deepest anomalies are more than 17 km deep and lie to the south of the study area. Examination of these various maps reveals that the various geological faults mentioned above generally follow ENE-WSW, ESE-WNW, NE-SW, NW-SE, E-W and even N-S directions. All of these directions appear to be closely linked to the geological history of the region. It is quite clear that the study area was the site of intense tectonic movements caused by the collision between the Congo craton and the Pan-African chain of Central Africa.The geological and tectonic impact of the collision between the Congo Craton and the Pan-African Ridge of Central Africa was considerable, with the formation of various tectonic faults, fractures, dykes and folds. The present gravity analysis is based on the analysis of EGM 2008 gravity data using different operators. Oasis Montaj software was used to process the data. The Bouguer anomaly map was used to identify the main local and regional anomalies. In addition, maps of the horizontal and vertical gradients of the Tilt angle analytical signal revealed several short-wavelength anomalies such as folds, dykes, fractures and faults. The map of superimposed maxima was used to create the structural map of the study area. For its part, the quantitative study provided an opportunity to assess the depths at which the anomalies originated. The deepest anomalies are more than 17 km deep and lie to the south of the study area. Examination of these various maps reveals that the various geological faults mentioned above generally follow ENE-WSW, ESE-WNW, NE-SW, NW-SE, E-W and even N-S directions. All of these directions appear to be closely linked to the geological history of the region. It is quite clear that the study area was the site of intense tectonic movements caused by the collision between the Congo craton and the Pan-African chain of Central Africa.

关 键 词：FAULTS LINEAMENTS Contacts Modelling 

分 类 号：P31[天文地球—固体地球物理学]