ABSTRACT The provenance of sandstones derived from theLower Voltaian Kwahu-Morago Group and the Middle Voltaian Oti-Pendjari Group of the Neoproterozoic Voltaian basin are discriminated by their Sm-Nd Isotopic compositions. Plots from the Sm-Nd data suggested provenance of the Kwahu-Morago Group to be from the Birimian metasediments and associated “basin type”granitoids. The Sm-Nd studies have further revealed an average TDM model age of whole rock samples in the Kwahu-Morago Group to be 2.2 Ga which shows that this portion of the Voltaian Supergroup represents eroded remnants of “basin type” granitoids. Sm-Nd data from the Oti-Pendjari Group suggested provenance from the Birimian volcanic rocks and probably with contribution from the Pan African rocks. Its average TDM model age of whole rock samples was 2.0 Ga, which generally falls in the range of the model ages for the basement Birimian volcanic rocks as well as the model ages for the granitoid rocks and thus suggests the major source rock of the Oti-Pendjari Group as coming from the volcanic belts. The model ages for both groups seem to indicate clastic supply from an early Proterozoic crustal provenance. This study shows that whole rock isotopic analyses can also be complementary in providing an insight into the origin and development of sedimentary successions.
Cite this paper
C. Anani, D. Asiedu, J. Manu, P. Nude, J. Kutu and P. Sakyi, "Preserved Sm-Nd Isotopic Composition as Useful Provenance Indicators in Neoproterozoic Sandstones in the Voltaian Basin, Ghana," International Journal of Geosciences, Vol. 3 No. 3, 2012, pp. 463-468. doi: 10.4236/ijg.2012.33049.
 P. N. Taylor, S.Moorbath, A. Leube and W. Hirdes, “Early Proterozoic Crustal Evolution in the Birimian of Ghana: Constrains from Geochronology and Isotope Geochemistry,” Precambrian Research, Vol. 56, 1992, pp. 97-111. doi:10.1016/0301-9268(92)90086-4
A. P. Dickin, “Radiogenic Isotope Geology,” Cambridge University Press, Cambridge, 1995, p. 145.
F. Kalsbeek, D. Frei and P. Affaton, “Constraints on Provenance, Stratigraphic Correlation and Structural Con- text of the Volta Basin, Ghana, from Detrital Zircon Geochronology: An Amazonian Connection?” Journal Sedimentary Geology, Vol. 212, 2008, pp. 86-95.doi:10.1016/j.sedgeo.2008.10.005
C. Y. Anani, “Sandstone Petrology and Provenance of the Neoproterozoic Voltaian Group in the Southeastern Vol- taian Basin, Ghana,” Journal Sedimentary Geology, Vol. 128, 1999, pp. 83-98. doi:10.1016/S0037-0738(99)00063-9
J. N. Carney, C. J. Jordan, C. W. Thomas, D. J. Condon, S. J. Kemp and J. A. Duodo, “Lithostratigraphy, Sedimentation and Evolution of the Volta Basin in Ghana,” Precambrian Research, Vol. 183, 2010, pp. 701-724.doi:10.1016/j.precamres.2010.08.012
N. R. Junner and T. Hirst, “The Geology and Hydrology of the Voltaian Basin,” Gold Coast (Ghana) Geological Survey Memoir, No. 8, 1946, p. 51.
N. A. Bozhko, “Classification and Correlation of Upper Precambrian Deposits of African Platform,” Vestnik Moscowskogo Universiteta, Geologia, 2, 1969.
R. Annan-Yorke, “Geology of the Voltaian Basin (Sum- mary of Current Ideas),” In: J. E. Cudjoe, Ed., Special Bulletin for Oil Exploration, Geological Survey Depart- ment, Accra, 1971, p. 29.
P. Affaton, J. Sougy and R. Trompette, “The Tectono- Stratigraphic Relationships between the Upper Precam- brian and Lower Paleozoic Volta Basin and the Pan Afri- can Dahomeyide Orogenic Belt (West Africa),” American Journal of Science, Vol. 280, No. 3, 1980, pp. 224-248. doi:10.2475/ajs.280.3.224
F. Kalsbeek, D. Frei and P. Affaton, “Constraints on Provenance, Stratigraphic Correlation and Structural Context of the Volta Basin, Ghana, from Detrital Zircon Geochronology: An Amazonian Connection?” Journal Sedimentary Geology, Vol. 212, No. 1-4, 2008, pp. 86-95.doi:10.1016/j.sedgeo.2008.10.005
S. K. Kete, “Geology of Field Sheet 134, Abetifi South East,” Ghana Geological Survey Department Archive Report, No. 77, 1980.
R. S. Saunders, “Early Paleozoic Orogeny in Ghana: Foreland Stratigraphy Structure,” Geological Society of American Bulletin, Vol. 81, 1970, pp. 233-240.doi:10.1130/0016-7606(1970)81[233:EPOIGF]2.0.CO;2
H. Kagami, M. Iwata, S. Sano and H. Honma, “Sr and Nd Isotope Compositions and Rb, Sr, Sm and Nd Concentrations of Standard Samples,” Technical Report of ISEI, Misasa, 1987, p. 16.
T. Hamamoto, Y. Osanai and H. Kagami, “Sm-Nd, Rb-Sr and K-Ar Geochronology of the Higo Metamorphic Terrane, West-Central Kyushu, Japan,” The Island Arc, Vol. 8, No. 2, 1999, pp. 323-334.doi:10.1046/j.1440-1738.1999.00240.x
H. Rollinson, “Using Geochemical Data: Evaluating, Presentation Interpretation,” Longman, London, 1993, p. 352.
S. L. Goldstein, R. K. O’Nions and P. J. Hamilton, “A Sm-Nd Study of Atmospheric Dusts and Particulates from Major River Systems,” Earth Planetary Science Letters, Vol. 70, 1984, pp. 221-236.doi:10.1016/0012-821X(84)90007-4
F. Kalsbeek and R. Frei, “Geochemistry of Precambrian Sedimentary Rocks Used to Solve Stratigraphical Problems: An Example from the Neoproterozoic Volta Basin, Ghana,” Precambrian Research, Vol. 176, No. 1-4, 2010, pp. 65-76. doi:10.1016/j.precamres.2009.10.004
M. P. Debard, A. Loi and J. J. Peucat, “Zircon Typology Combined with Sm-Nd Whole-Rock Isotope Analysis to Study Brioverian Sediments from the Armorican Massif,” Journal Sedimentary Geology, Vol. 101, 1996, pp. 243-260. doi:10.1016/0037-0738(95)00068-2
S. R. Taylor and S. M. McLennan, “The Continental Crust: Its Composition and Evolution,” Blackwell, Oxford, 1985, p. 312.