Series-2 (Nov. – Dec. 2025) Nov. – Dec. 2025 Issue Statistics
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | Petrology And Structural Geology Of Gneissic Rocks In Bansan Osokom And Its Environs, Southeast Nigeria |
| Country | : | Nigeria |
| Authors | : | U. B. Abia || V. U. Ukaegbu || N. Egesi |
 |
: | 10.9790/0990-1306020109  |
Abstract: This study examined the petrology and structural characteristics of gneissic rocks around Bansan Osokom and its environs to clarify their metamorphic evolution and deformational history. Fourteen representative samples of medium- to coarse-grained migmatite gneisses (9) and granite gneisses (5) were analyzed petrographically. Modal composition indicates biotite–cordierite–garnet migmatite gneiss and biotite–cordierite granite gneiss as the major lithologies. The gneissic rocks display granoblastic to lepidoblastic textures defined by biotite, while garnet shows porphyroblastic.....
Keyword: Bansan Osokom: Cordierite; Peak metamorphism: Polyphase deformation: Retrogression
[1]
M. A. Agbebia And N. Egesi. “Lineament Analysis And Inference Of Geological Structures In Bansara-Boki Area, Southeastern Nigeria,” Asian Journal Of Environment And Ecology, Vol. 13, Issue 1, Pp. 28–44, 2020.
[2]
R. Black, R. Caby, J. M. Bertrand, A. M. Boullier, R. Dars, And J. Lameyre. “Evidence For Late Precambrian Plate Tectonics In West Africa,” Nature, Vol 278 Issue 5704 Pp. 223–227, 1979.
[3]
K.C. Burke And J.F. Dewey “Orogeny In Africa,” In Tectonophysics, Vol. 14, Issue 1–2, Pp. 93–112, 1972.
[4]
M. Leblanc. “The Late Proterozoic Ophiolites Of Bou Azzer (Morocco): Evidence For Pan-African Plate Tectonics” In A. Kröner (Ed.), Precambrian Plate Tectonics, Amsterdam: Elsevier, Pp. 435-451, 1981.
[5]
S. S. Dada. “Proterozoic Evolution Of Nigeria” In: Oshi, O. (Ed.), The Basement Complex Of Nigeria And Its Mineral Resources (A Tribute To Prof. M. A. O. Rahaman). Akin Jinad And Co., Ibadan, Pp. 29–44, 2006