Lineament intersections mapping and analysis of Kagoro younger granites and environs, north central Nigeria

Histograms of lineament intersection lengths in the study area are positively skewed Variations in frequencies within their respective class intervals suggest that the stress intensity which gave birth to the lineaments are unequal. This is also true by the absence of lineaments within some class intervals. Directional lineaments’ intersection of the rose diagrams are mainly found in conjugate NE – SW and NW – SE orientations. Only small parts of the Kagoro hill area and associate rocks are covered by lineament intersections of high densities by drainage and satellite maps which suggest that they were produced mainly from shallow structural features associated with joints, stream and rivers. Magnetic and gravity maps present ideal images of lineament intersections, as high lineament intersections are located on the Kagoro Younger Granite outcrop and other rock exposures, which clearly indicate that they are derivatives of deep seated structures which could be linked to fractures and faults. A combined map of the four lineament sources expresses clearly the locations and trends of the Kagoro Younger Granite complex and its associate rocks. On this map, densely populated lineament intersections are located over outcropped rock units and trend in the same directions. Generally the two dimensional maps indicate the main structural features to be trending along the N – S, NE – SW, E – W and NW – SE directions, which is consistent with structural trends in the region and regional tectonic stress regimes and fractures in Nigeria.