Geochemical analyses of whole-rock samples of the Bape granitoids massif , Adamawa-Yade block, Cameroon

Published: 26-05-2020| Version 1 | DOI: 10.17632/zppdzwrkmw.1
Contributor:
Charles NKOUMBOU

Description

Data description of the manuscript entitled ‘Petrology, geochemistry and geodynamics of the Pan-African high-K calc-alkaline to shoshonitic-adakitic Bape granitoids (Adamawa-Yade block, Cameroon): hot oceanic crust subduction’ by Jacqueline Numbem Tchakountea, Fuh Calystus Gentrya, Aurélie Ngamy Kamwaa, Victor Metanga, Aurélien Eglingerb, Joseph Mvondo Ondoaa, Charles Nkoumboua* The Pan-African orogeny in Cameroon yielded two belts or domains: (i) the northern domain known as Poly-Kebbi group and (ii) the southern domain or Yaoundé group have sandwiched the central Adamawa-Yade Archaean block. North-south and south-north facing subductions have yielded many Pan-African calk-alkaline and High-K calk-alkaline intrusions in this Adamawa-Yade block. This study presents the petrography and geochemistry of the longest intrusive Bape massif (60 km-long) of the Adamawa-Yade block. The peculiar feature of the Bape granitoids is the occurrence of adakitic rocks in addition to classical High-K calc-akaline to shoshonitic series. These new results and the available data allow a conclusion that this intrusion and neighbouring ones are linked to a south-north facing subduction of a hot Yaoundé oceanic crust under the Archaean Adamawa-Yade block. The geochemical data, whole-rock analyses including major elements expressed in wt.% of oxides and trace elements expressed in terms of parts per million (ppm).

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