Hangloa granitoids form part of the wide range calc-alka-line Pan-African granitic suites within the Adamawa Yade Domain(AYD)in Cameroon.There are several reports on metaluminous granitoids within this domain.The peralu-minous suite has been locally reported and their petrogen-esis is not fully understood.Petrography and whole-rock geochemistry were used to study the petrogenesis/forma-tion of granitic rocks within this area.The results show that the granitoids are composed of quartzo-feldspathic,made up of granites,monzonites and quartz monzonites which were intruded in the Paleoproterozoic orthogneissic base-ment.The major and trace element compositions show that they are high-K calc-alkaline to shoshonites,with S-type affinity.The molar ratio A/CNK is＞1.1,while the ratio of CaO+Na2O/Al2O3 is generally＜1 making them strongly peraluminous.The REE shows enrichment in the LREE over the HREE,with(La/Yb)N varying from 11.9 to 53.32,(Dy/Yb)N from 0.77 to 2.13 and moderately negative Eu anomaly((Eu/Eu*)N range from 0.42 to 0.93).Most granite samples show depletion in P,with CaO/Na2O＜0.3 and Rb/Sr≤1 indicative of clay-poor metapelitic source,while the others show clay-rich metagreywackes sources.The strong peraluminosity,S-type affinity,high Ba/Sr,Ba/Rb and low Rb/Sr indicate they are crustal-derived.The compositional variation might be induced by the partial melting of differ-ent source materials followed by fractional crystallization of the granitic magma.The source nature requires frag-ments of Paleoproterozoic metasedimentary and metaigne-ous rocks derived from the collision between the north-central Cameroon block and the Congo Craton during the Pan-African.

Yaya Fodoué;Mero Yannah;Rigobert Tchameni;Wadjou Jacques Wassouo;Amadou Diguim Kepnamou;Joseph Penaye;Abakar Mahamat;Emmnuel Nomo Negue

Institute of Geology and Mining Research,P.O Box 4110,Nlongkak,Yaounde,Cameroon;Department of Earth Sciences,Faculty of Science,University of Ngaoundere,P.O.Box 454,Ngaoundere,Cameroon 3 Department of Earth Science,University of Yaounde I,Yaounde,Cameroon

地球化学学报（英文版）

[1]Yaya Fodoué;Mero Yannah;Rigobert Tchameni;Wadjou Jacques Wassouo;Amadou Diguim Kepnamou;Joseph Penaye;Abakar Mahamat;Emmnuel Nomo Negue-.Peraluminous granitoids within the Hangloa area,Adamawa-Yadé Domain,Cameroon:Petrogenesis and tectonic implication)[J].地球化学学报（英文版）,2022(06):1104-1122

Peraluminous,Hangloa,Adamawa,Yad,Yade,AYD,peralu,petrogen,quartzo,monzonites,orthogneissic,shoshonites,CaO+Na2O,metagreywackes,peraluminosity,metaigne

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