IIARD International Institute of Academic Research and Development

International Journal of Agriculture and Earth Science (IJAES )

E- ISSN 2489-0081
P- ISSN 2695-1894
VOL. 10 NO. 2 2024
DOI: https://doi.org/10.56201/ijaes.v10.no2.2024.pg120.129

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Petrography of Pan African Migmatite around Liman Katagum, Bauchi North East Nigeria

Maimunatu Halilu , Ahmed Isah Haruna, Abdulmajid Isa Jibrin, Abubakar Sadiq Maigari, Faisal Abdullahi , Fauziyah Ahmad Rufai, Umar Sambo Umar, Hamid Reza Gayyemi

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Abstract

The study area Liman Katagum lies within latitudes 10°00'00" N and 10°30'00" N and longitudes 9°30'00" E and 10°30'00" E which is part of sheet 149 Bauchi SW covering a total area of 42 km2. Based on field relationship and petrography, the area is underlined predominantly by migmatites of different texture such as restite, stromatic metatexite, banded orthogneisses metatexite, melanocratic diatexite, mesocratic diatexite, and leucocratic diatexite. Restite composed of a predominance of mafic minerals because these are harder to melt. Typical minerals are amphibole, biotite, pyroxene, ilmenite or other iron oxides and some plagioclase feldspar. The stromatic migmatites bands of leucosome that are oriented parallel to the major plane of anisotropy in the palaeosome, which are typically compositional layering or a solid-state foliation. It is evident that the individual leucosome bands have melanosome on both sides, while the stromatic type shows evidence of pytgmatic fold and crenulation cleavage. The diatexite migmatite is dominated by pervasive neosome and display a granitic appearance with abundant schlieren. Pre-partial-melting structures are absent from the neosome, and commonly replaced by syn-anatectic flow structures or isotropic neosome. The melt-depleted remains of protolith layers (biotite schlieren) stand out as dark alignment within the diatexites.

keywords:

Diatexite, Stromatic, foliation, Banded Orthogneiss and Liman Katagum area.

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References:

YAKYMCHUK, C. (2020). Migmatites. Reference Module in Earth Systems and
Environmental Sciences. doi:10.1016/b978-0-08-102908-4.00021-7

SAWYER, E. W. (2008). Atlas of migmatites. The Canadian Mineralogist, Special Publication,
NRC Research Press, Ottawa, Ontario, Canada, Vol. 9, 371p.

RAHAMAN, M. A., AND OCAN, O. (1978). On the Relationship in the Precambrain
Migmatite Gneiss of Nigeria. Journal of Mining Geol., 15(1), 23-32.

FERRÉ, E. C., AND CABY, R. (2007). Granulite facies metamorphism and charnockite
plutonism: examples from the Neoproterozoic Belt of northern Nigeria. Proceedings of
the Geologists' Association, 118(1), 47-54.

OLIVER, N.H.S. AND BARR, T.D. (1997). The geometry and evolution of magma pathways
through migmatites of the Halls Creek Orogen, Western Australia. Mineralogical
Magazine 61:3–14.

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