TITLE:
Petrographic and Geochemical Characteristics of the Granitoids in the South of Godé (North of the Square Degree of Léo-Burkina Faso, West Africa)
AUTHORS:
Adama Ouédraogo Yaméogo, Hubert Gounwendmanaghré Zongo, Pascal Ouiya, Omar Akonyiré, Abraham Seydoux Traoré, Saga Sawadogo, Séta Naba
KEYWORDS:
Burkina Faso, Godé, Man/Leo Shield, Petrography, Geochemistry, Partial Melting, Geotectonic Setting
JOURNAL NAME:
International Journal of Geosciences,
Vol.15 No.2,
February
7,
2024
ABSTRACT: South of Godé, in the central-western region of
Burkina Faso, granitoids of Paleoproterozoic
age are similar to those of the Man/Leo shield. This study focused on the
petrographic and geochemical characteristics of these granitoids, with the
following results: 1) The tonalite that outcrops in the south-west of the study area belongs to the TTG group or first generation
granitoids. They are most often ribboned at
outcrop and have a geochemical signature close to that of Archean TTGs.
Tonalite has a metaluminous character and the REE spectrum indicates
that it may be derived from partial melting of basic magmatic rocks. 2)
Biotite granites have no outcrop structure. They are weakly metaluminous to
peraluminous and potassic to highly potassic. Their rare earth spectra indicate that they may be derived from
the partial melting of TTG granitoids. 3) Geotectonic diagrams show that the granitoids
studied to the south of Godé were emplaced in an active tectonic context
similar to that of present-day subduction zones.