@article{fdi:010090936,
  title = {{L}ateritic landsurface-regolith differentiation on {P}an-{A}frican granitic basement of {A}damaoua highland, {C}ameroon},
  author = {{N}ouazi {M}omo, {M}. and {B}eauvais, {A}nicet and {N}tchantcho, {R}. and {T}ematio, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he aim of this paper is to describe and discuss the laterization pattern and the structuration mode of land-surfaces formed over the {P}an-{A}frican granitic basement of {A}damaoua highland. {P}aleocene to mid-{E}ocene epeirogeny compartmentalized the regional topography of {A}damaoua on which lateritic landsurfaces have been formed over granitoids of comparable geochemistry. {R}egional scale geomorphological observations and petro-geochemical characterization of lateritic duricrusted regolith allow to distinguish three distinct lateritic landsurfaces, which are compared to lateritic surfaces from {W}est {A}frica. {R}egolith of the upper and middle landsurfaces incorporate composite lateritic duricrusts including old bauxites and ferricretes, which are petrological heritages from former regolith of etch-plain type {P}aleogene {A}frican {S}urface. {O}n {P}an-{A}frican granitic basement of {A}damaoua, the upper and middle landsurfaces formed on granitoids before mid-{M}iocene basaltic-andesitic outpourings that locally cover them, while the lower landsurface also formed on grantic rocks has been mostly shaped over late {N}eogene. {T}he geochemical compositions of lateritic duricrusts of upper and middle landsurfaces are clearly distributed between aluminous, ferruginous and kaolinite poles that typifies lateritic regolith of the bauxitic and ({F}e-rich) intermediate etch-plains surfaces similarly as lateritic regolith of the {P}aleogene {W}est-{A}frican sequence. {G}eochemical compositions of lateritic regolith on lower landsurface are mostly distributed between silica, kaolinite and iron, suggesting that more or less evolved or duricrusted horizons have been exposed by differential erosion of this landsurface. {L}ateritic regoliths of the three landsurfaces are also typified and differentiated by their index of laterization ({IOL}) and fractionation patterns of some trace ({C}r, {V}, {Z}r, {T}i, {N}b, {T}h, {Y}, {T}a, {G}a) and rare earth elements ({HREE}, {E}u/{E}u*, ({G}d/{Y}b){N}). {T}hough {N}eogene volcanic epirogenic uplift effects on landscape cannot be totally excluded, erosion and down-wasting of {P}aleogene landscape mostly evolved to a degraded lateritic etch-plain and late formation of a lower pediplain on {P}an-{A}frican basement of {A}damaoua highland under long-lasting per-humid climatic conditions over {C}enozoic.},
  keywords = {{CAMEROUN} ; {ADAMOUA} {REGION}},
  booktitle = {},
  journal = {{C}atena},
  volume = {242},
  numero = {},
  pages = {108103 [17 ]},
  ISSN = {0341-8162},
  year = {2024},
  DOI = {10.1016/j.catena.2024.108103},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090936},
}