Show simple item record

dc.contributor.authorMomo, M.N.
dc.contributor.authorBeauvais, A.
dc.contributor.authorTematio, P.
dc.contributor.authorYemefack, M.
dc.date.accessioned2022-08-16T10:04:24Z
dc.date.available2022-08-16T10:04:24Z
dc.date.issued2020-11
dc.identifier.citationMomo, M.N., Beauvais, A., Tematio, P. & Yemefack, M. (2020). Differentiated Neogene bauxitization of volcanic rocks (western Cameroon): Morpho-geological constraints on chemical erosion. CATENA, 194: 104685, 1-13.
dc.identifier.issn0341-8162
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7648
dc.description.abstractLateritic weathering of Miocene volcanic rocks from western Cameroon highlands formed duricrusted bauxitic profiles. Two weathering profiles on ca. 14 Ma basalt and ca. 16 Ma trachyte were studied using geochemical mass balance functions. Less mobile elements Ti and Zr were used as references to quantify volumetric change (strain, ε), element transfer rate (τ) and geochemical mass transfers during the bauxitization process of basalt and trachyte. Conversion of parent rocks to kaolinite and goethite rich saprolites evolved to Al-Fe rich bauxites, mostly composed of gibbsite and iron oxy-hydroxides (goethite and hematite). However, formation of Al-Fe bauxitic profiles required higher Si leaching on trachyte than on basalt. Our results document that chemical weathering of a larger thickness of trachyte than basalt has been required to form a unit meter of weathering profile, implying differential rates of rock chemical erosion and topographic decay of landscapes. Rates of chemical erosion and formation of lateritic weathering profiles in western Cameroon have been mostly controlled by drainage conditions and volcanic rocks composition (mostly SiO2 content differences), that also resulted in contrasted landscapes evolution during the Neogene.
dc.format.extent1-13
dc.language.isoen
dc.subjectWeathering
dc.subjectVolcanic Eroptions
dc.subjectErosion
dc.subjectCameroon
dc.titleDifferentiated Neogene bauxitization of volcanic rocks (western Cameroon): morpho-geological constraints on chemical erosion
dc.typeJournal Article
cg.contributor.affiliationInstitute of Geological and Mining Research, Cameroon
cg.contributor.affiliationAix-Marseille University
cg.contributor.affiliationUniversity of Dschang
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryCameroon
cg.coverage.hubCentral Africa Hub
cg.identifier.bibtexciteidMOMO:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectClimate Change
cg.iitasubjectMeteorology and Climatology
cg.journalCatena
cg.notesPublished online: 30 May 2020
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1016/j.catena.2020.104685
cg.iitaauthor.identifierMartin YEMEFACK: 0000-0002-6709-8503
cg.futureupdate.requiredNo
cg.identifier.volume194


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record