Calc-alkaline orthogneisses of the Foumban-Bankim shear zone: witnesses of an internal zone of a Pan-African active margin;Les orthogneiss calco-alcalins de Foumban-Bankim : témoins d'une zone interne de marge active panafricaine en cisaillement

Comptes Rendus - Geoscience

Volumn 338, Issue 9, 2006, Pages 606-616

  Njonfang, Emmanuel ^a   Ngako, Vincent ^b   Kwekam, Maurice ^c   Affaton, Pascal ^d  

^a UNIVERSITY OF YAOUNDÉ I   (Cameroon)

^b Inst Rech Geologiques et Minieres   (Cameroon)

^c UNIVERSITY OF DSCHANG   (Cameroon)

^d CEREGE   (France)

Author keywords

type clasts; Cameroon; Granitoids; Mylonites; Pan African; Shear zone; Shoshonites

Indexed keywords

CONTINENTAL MARGIN; GRANITOID; MAGMATIC DIFFERENTIATION; OROGENY; ORTHOGNEISS; SHEAR ZONE; SHOSHONITE; SUBDUCTION ZONE; TECTONIC EVOLUTION;

AFRICA; CAMEROON; SUB-SAHARAN AFRICA; WEST AFRICA;

EID: 33746547898     PISSN: 16310713     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.crte.2006.03.016     Document Type: Article

References (33)

1. Bessoles B., and Lasserre M. Le complexe de base du Cameroun. Bull. Soc. géol. France 7 XIX (1977) 1085-1092
2. Blundy J.D., and Holland T.J.B. Calcic amphibole equilibria and a new amphibole-plagioclase geothermometer. Contrib. Mineral. Petrol. 104 (1990) 208-224
3. Browne S.E., and Fairhead J.D. Gravity study of the Central African Rift System: a model of continental disruption. 1. The Ngaoundere and Abu Gabra rifts. Tectonophysics 94 (1983) 187-203
4. Chappell B.W., and White A.J.R. Two contrasting granite types. Pac. Geol. 8 (1974) 173-174
5. Cornachia M., and Dars R. Un trait structural majeur du continent africain. Les linéaments centrafricains du Cameroun au golfe d'Aden. Bull. Soc. géol. France XXV (1983) 101-109
6. De Almeida F.F.M., Hasui Y., Brito Neves B.B., and Fuck R. Brasiliano structural provinces: an introduction. Earth Sci. Rev. 17 (1981) 1-29
7. Ferré E.C., Caby R., Peucat J.J., Capdevila R., and Monier P. Panafrican, post-collisional, ferro-patassic granite and quartz-monzonite plutons of Eastern Nigeria. Lithos 45 (1998) 255-279
8. Hanmer S. Asymmetrical pull-aparts and foliation fish as kinematic indicators. J. Struct. Geol. 8 (1986) 111-122
9. Hutton D.H.W. Granite emplacement mechanism and tectonic controls: inferences from deformation studies. Trans. R. Soc. Edinb. Earth Sci. 79 (1988) 345-355
10. Johnson M.C., and Rutherford M.L. Experimental calibration of the aluminium in hornblende geobarometer with application to Long Valley caldera (California) volcanic rocks. Geology 17 (1989) 837-841
11. P. Koch, Carte géologique de reconnaissance à l'échelle 1/500 000, feuille Banyo, avec notice explicative, Dir. Min. Géol. Imp. Nat. Paris, 1953 (47 p.)
12. Leake B., et al. (21 co-auteurs), Nomenclature of amphiboles, Int. Min. Assoc., Commission on New Minerals and mineral names. Am. Mineral. 82 (1997) 1019-1037
13. Mandal N., Samanta S.K., and Chakraborty C. Progressive development of mantled structures along elongate porphyroclasts: insights from numerical models. J. Struct. Geol. 22 (2000) 993-1008
14. Middlemost E.A.K. Magmas, Rocks and Planetary Development (1997), Longman, Harlow
15. Nachit H., Razafimahefa N., Stussi J.-M., and Carron J.-P. Composition chimique des biotites et typologie magmatique des granitoïdes. C. R. Acad. Sci. Paris Ser. II 301 (1985) 813-818
16. V. Ngako, Les déformations continentales panafricaines en Afrique centrale. Résultat d'un poinçonnement de type hymalayen, thèse d'État, université Yaoundé-1, 1999
17. Ngako V., Affaton P., Nnange J.M., and Njanko Th. Pan-African tectonic evolution in central and southern Cameroon: transpression and transtension during sinistral shear movements. J. Afr. Earth Sci. 36 (2003) 207-214
18. E. Njonfang, Contribution à l'étude de la relation entre la « Ligne du Cameroun » et la direction de l'Adamaoua : 1. Pétrologie, géochimie et structure des granitoïdes panafricains de la zone de cisaillement Foumban-Bankim (Ouest Cameroun et Adamaoua), 2. Pétrologie et géochimie des formations magmatiques tertiaires associées, thèse d'État, université Yaoundé-1, 1998
19. Njonfang E., Moreau C., and Tchoua F.M. La bande mylonitique Foumban-Bankim, Ouest-Cameroun : une zone de cisaillement de haute température. C. R. Acad. Sci. Paris, Ser. IIa 327 (1998) 735-741
20. Passchier C.W. Mixing in flow perturbations : a model for development of mantled porphyroclasts in mylonites. J. Struct. Geol. 16 (1994) 733-736
21. J. Penaye, Pétrologie et structures des ensembles métamorphiques au Sud-Est de Poli (Nord-Cameroun). Rôles respectifs du socle protérozoïque inférieur et de l'accrétion crustale panafricaine, thèse, INPL, Nancy, 1988
22. Rickwood P.C. Boundary lines within petrologic diagrams which use oxides of major and minor elements. Lithos 22 (1989) 247-263
23. Samson S.C., Patchett P.J., McChelland W.C., and Gehrels G.E. Nd isotopic characterization of metamorphic rocks in the Coast Mountains, Alaskan and Canadian Cordillera : ancient crust bounded by juvenile terranes. Tectonics 10 (1990) 770-780
24. Streckeisen A.L. To each rock its proper name. Earth Sci. Rev. 12 (1976) 1-33
25. Swanson M.T. Late Acadian-Alleghenian transpressional deformation: evidence from asymmetric boudinage in the Casco Bay area, coastal Maine. J. Struct. Geol. 14 (1992) 323-341
26. Tagne Kamga G. Petrogenesis of the Neoproterozoic Ngondo plutonic complex (Cameroon, west central Africa): a case of late-collisional ferro-potassic magmatism. J. Afr. Earth. Sci. 36 (2003) 149-171
27. Ten Brink C., and Passchier C.W. Modeling of mantled porphyroclasts using non-Newtonian rock analogue materials. J. Struct. Geol. 17 (1995) 131-146
28. Toteu S.F. Geochemical characterization of the main petrographical and structural units of northern Cameroon: implications for Pan-African evolution. J. Afr. Earth Sci. 10 (1990) 615-624
29. Toteu S.F., Michard A., Bertrand J.M., and Rocci G. U/Pb dating of Precambrian rocks from Northern Cameroon, orogenic evolution and chronology of the Pan-African belt of Central Africa. Precambrian Res. 37 (1987) 71-87
30. Toteu S.F., Van Schmus W.R., Penaye J., and Michard A. New U{single bond}Pb and Sm{single bond}Nd data from north-central Cameroon and its bearing on the pre-Pan African history of central Africa. Precambrian Res. 108 (2001) 45-73
31. Toteu S.F., Penaye J., and Poudjom Djomani Y. Geodynamic evolution of the Pan-African belt in central Africa with special reference to Cameroon. Can. J. Earth Sci. 41 (2004) 73-85
32. G. Weecksteen, Carte géologique de reconnaissance au 1/500 000, feuille Douala-Est, avec notice explicative, Imp. Nat. Paris, 1957 (37 p.)
33. Wennberg O.P. Superimposed fabrics due to reversal of shear sense: an example from the Bergen Arc Shear Zone, western Norway. J. Struct. Geol. 18 (1996) 871-889