PETROGRAPHICAL STUDIES OF AMATE AREA, AFIKPO BASIN SOUTHERN BENUE TROUGH
Oloto, I.N1. Yikarebogha,Y2. Omoboriowo, A.O3
Senior Lecturer, Department of Geology, University of Port Harcourt, Port Harcourt, Nigeria1
Researcher, Drilling Department, Nigerian Petroleum Development Company, Benin, Nigeria2
Research Scholar, Geological Services, Shell Petroleum Development Company, Port Harcourt, Nigeria3
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Petrographic analyses were carried out on rock samples obtained form Amate and environs, in Afikpo Area of South Benne Trough, Nigria. The Area is located within latitudes 50 501 N and 60 001 N and longitudes 70 551 E and 70 571 301E in the region of Benue Trough graben with sediment infilling which had suffered deformations (NE-SW trending axis) and extensive magmatic activities. Petrography analysis indicated the presence of prolific exsolved, globular, texture in the arkosic sandstone and siltstone, confirming their metarnorphsed nature as quartzo-feldspathic hornfels. The texture is partially relict, which indicates retention of original pre-metamorphic sedimentary features which have not been obliterated by metamorphism, in addition to textures with progressive nucleation and formation of exsolved globules which coalesce or segregate within shifting boundaries, then form polygonal granoblastic clusters or mineral crystals and eventually interlocking crystals.