Contribution of ALOS PALSAR DEM Imagery to the Study of Geological and Morphostructural Lineaments of Boma Trough Block, Onshore Coastal Basin of D.R. Congo

Geological and morphostructural lineaments are considered as the surface expression of geological structures linear features valleys, ridges river drainage systems. Lineaments extracted from satellite images have always been effective in understanding structural context a region. The observed on provide information tectonic stresses that affected an area give first impression probable existence orientation may constitute oil traps at depth. This study aims to semi-automatically extract (by combining use GIS software, remote sensing operator intervention) Boma Trough Block, block located east D.R. Congo Coastal Basin still poorly explored. image used this work is ALOS PALSAR DEM with spatial resolution 12.5m, enhanced traditional hillshade (solar azimuth 315° 45°) multidirectional hillshade; which allowed extraction 3129 lineaments, lengths ranging 0.16 3.79 km, oriented 47.1% along NW-SE direction, 44.1% NE-SW, 7.3% for N-S 1.4% E-W. Lineament density mapping revealed areas high very densities cover 43% ??the area, where Precambrian basement largely outcropping, while low represent 41% contain sedimentary formations. Areas moderate covered ??16%. compared reality field show positive correlation. confirms important contribution processing approach study.