Abstrakt

PETROGRAPHIC STUDIES OF AMENUAMAURO AREA, AFIKPO BASINS SOUTH EAST, NIGERIA

OLOTO, I.N IYAYI, A.O

The petrographic analysis were carried out on indurated sediments obtained from Amenu-Amauro environ in Afikpo area, in the south Benue Frough, Nigeria. The study area lies between longitudes 7o 5055’N and 6o00’Ns and located within the Abakaliki anticlinorium of the south Benue trough.The infilled sediments of the trough had undergone deformation and affected by the magmatic activities during cenomanian and santonian episodes..Petrographic analysis indicated the presence of metasediments including Met greywacke arkoses sandstone with prolific globular exsolved texture poorly sorted lithnic arenite with elongale grains some showing reaction rums.Buchile of limestone with crystallized shell, sandstone and slate or high indurated shale with section showing globular, plank tonic foraminifera tests.The textures are partly relict indicating retention of original pre-metamorphic sedimentary features which have not been obliterated by metamorphism, hence, they are typomorphic