PETROGRAPHIC STUDIES OF LIMESTONE IN DUKAMAJE FORMATION AT GILBEDI, GADA, SOKOTO BASIN, NIGERIA
The study was conducted in and around Gilbedi village and its environs in the Iullemmeden Basin, Sheet 4 SW, Gada local government area, Sokoto, North-West Nigeria. The research area is located in the Sokoto Basin, which is part of the Iullemmeden Basin. The study area is bounded by latitudes 13046'05"N to 13043'22"N and longitudes 5045'00"E to 5040'45"E covering 25 Km2. The mapping exercise was carried out using a topographic base map on a scale of 1:25,000. The observed Dukamaje Formation is derived from a marginal marine depositional setting and is primarily composed of shales, limestones, and mudstone with gypsum intercalation. Shales are consolidated mudstones with a fine-grained texture which is greyish. Limestone is medium to coarse-grained. It is a pale yellow to greyish in color. Petrographic observation showed the grains to be equigranular, and having interstitial quartz cement. The quartz occurs as colorless anhedral crystal with no alteration but with wavy extinction and without cleavage. Other minerals present include muscovite. Based on Folk’s classification for limestone, the limestone in the study area is called “extramicrite” because the allochems are extraclasts. The limestone also lime mud supported which is less than 10% of grains Based on Dunham’s classification schemes for limestone, the limestone of the studied Dukamaje Formation is a “mudstone”.
Bertrand-Safarti, J. Moussine-Pouchkine, A. and Fabre, J. (1977) Geodynamique desaires sedimentaires cratoniques: quelques examples sahariens, Bull. Centres Reh. Expir, Elf Aquitaine, 1, 1, 217-231.
Faure, H. (1996) Report de fin d champagne 1956. Less formation sedimentaires du SE et de Iâ€™est de Iâ€™air (Niger). Arch. Dir. Fr. Mine et Geology, Dakar.
Greigert, J. (1957) Introduction a la reconnaissance hydrologique du BassinOccidentale du Niger: Dakar, Senegal, Direction Federale de Mines et de la Geologie.
Haynes J, Nwabufo-ene K (1998) Foraminifera from the Paleocene phosphate beds, Sokoto, Nigeria. Revista Espariola de Micropaleon. 30: 51-76.
Kogbe CA (1972) Preliminary study of the geology of the Nigerian sector of the Iullemmeden basin. In: Dessauvagie TFJ, Whiteman AJ (eds) African Geology. lbadan, University Press, Nigeria, pp 219â€“228
Kogbe CA (1976) Paleogeographic history of Nigeria from Albian times. In: Kogbe CA (ed), Geology of Nigeria. Elizabethan Publishers, Lagos, pp 15â€“35
Kogbe CA, Obialo AU (1976) Statistics of mineral production in Nigeria (1946â€“1974) and the contribution of the mineral industry to the Nigerian economy. In: Kogbe CA (ed) Geology of Nigeria. Elizabethan Publishers, Lagos, pp 391â€“428
Kogbe CA (1979) Geology of the South-Eastern (Sokoto) Sector of the lullemmeden Basin. Department of Geology, Ahmadu Bello. University Zaria Bulletin 32:142 pp
Kogbe CA (1989) Geology of Nigeria, 2nd Edition. Rockview Nige Ltd, Jos, 538pp
Obiosio EO, Obaje NG, Okosun EA (1998). Foraminiferal Paleoecology of the Kalambaina limestone south east sector of Iullemmeden basin, Sokoto, Nigeria. 34: 19-25.
Okosun EA (1995) A review of the geology of the Bornu Basin. J Mining Geol 31(2), 113â€“122
Okosun EA (1995). Paleocene Ostracods from Sokoto Basin, Northwestern Nigeria. J. Min. Geol. 31: 123-133.
Petters, SW (1976): The marine Maastrichtian and Paleocene sediments of Northwestern Nigeria. The Dukamaje Formation and the Sokoto Group. Geological guide to some Nigeria Cretaceous-Recent localities. 7th African Micropal. Coll. Ile-Ife, Nigeria, pp. 75-87.
Yelwa NA, Abdullahi IM, Nabage NA, Kasim SA (2015). Petrography and Paleoenvironmental Interpretation of Taloka and Dukamaje Formations, Southern Gadon Mata, Goronyo, Sokoto Basin-Nigeria. Journal of Environment and Earth Science www.iiste.org ISSN 2224-3216 (Paper) ISSN 2225-0948 (Online) Vol.5, No.2, 2015
Copyright (c) 2022 FUDMA JOURNAL OF SCIENCES
This work is licensed under a Creative Commons Attribution 4.0 International License.
FUDMA Journal of Sciences