Author/Authors :
zongo, wendkouni passecdé pauline université ouaga i pr. joseph ky zerbo - département des sciences de la terre, laboratoire de géoressource, ufr/svt, Burkina Faso , wenmenga, urbain université ouaga i pr. joseph ky zerbo - département des sciences de la terre, laboratoire de géoressource, ufr/svt, Burkina Faso , koffi, yao honoré université ouaga i pr. joseph ky zerbo - département des sciences de la terre, laboratoire de géoressource, ufr/svt, Burkina Faso
Title Of Article :
Mineralogical and petrochemical characterization of Tambogo serpentinites: Birimian greenstone belt of Kaya-Goren, Burkina Faso
Abstract :
The serpentinite massif of Tambogo, located in the Northeast of Ouagadougou, Burkina Faso, represents an ultramafic intrusion in the Birimian volcano-sedimentary formations of the greenstone belt of the Kaya-Goren arc, hydrothermalized and bordered by a facies of talc-schist in the sheared portions. The petrographic and geochemical analysis show the total transformation of these rocks into serpentinites, the serpentine remaining the major mineral of serpentinites assemblage with a variety of hydroxyl minerals (tremolite, chlorite, talc) and carbonates; remnants of clinopyroxene and brown hornblende remain locally. The geochemical evolution of the multi- element and rare earth spectra of the ultramafic protolith is especially marked by the splitting or accumulation of plagioclase. The geodynamic setting is similar to island arc tholeiitics based on the geochemistry of immobile trace elements (Y, Zr, Nb, V, Ti).
NaturalLanguageKeyword :
Burkina Faso , Tambogo , birimian , ultrabasites , serpentinites , talc , schists , MORB
JournalTitle :
bulletin de l’institut scientifique, section sciences de la terre
