@article{fdi:010066760,
  title = {{G}eochemical and palaeoenvironmental characteristics of {M}issole {I} iron duricrusts of the {D}ouala sub-basin ({W}estern {C}ameroon)},
  author = {{N}gon, {G}. {F}. {N}. and {E}tame, {J}. and {N}tamak-{N}ida, {M}. {J}. and {M}besse, {C}. {O}. and {M}bai, {J}. {S}. and {B}ayiga, {E}. {C}. and {G}{\'e}rard, {M}artine},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ajor and trace element composition of iron duricrusts including clayey material samples and biostratigraphy of the {M}issole {I} outcrop from the {P}aleocene-{E}ocene {N}'{K}apa {F}ormation in the {D}ouala sub-basin of {C}ameroon were used to infer the palaeoenvironment and relative age of the iron duricrusts. {I}ron duricrusts and clayey materials are essentially kaolinitic and smectitic and are generally siliceous and ferruginous (iron duricrusts) or siliceous and aluminous (clayey materials). {T}hese materials have high {C}hemical {I}ndices of {A}lteration ({CIA}=86.6-99.33%). {T}he negative {E}u anomalies with high ({L}a/{Y}b)({N}) shown by iron duricrusts and clayey sediments are essentially derived from silicic or felsic parent rocks when fractionated chondrite-normalized {REE} patterns also indicate felsic or silicic parent rocks. {T}he {M}issole {I} iron duricrusts have a post-{T}hanetian age according to the relative age of claystones ({T}hanetian) and were formed after the deposition of sedimentary materials in an anoxic low-depth marine environment with eutrophication of surface water, and may have been exhumed and oxidized under arid climate.},
  keywords = {{D}ouala sub-basin ; {G}eochemistry ; {I}ron duricrust ; {P}alaeoenvironment ; {W}estern {C}ameroon ; {CAMEROUN}},
  booktitle = {},
  journal = {{C}omptes {R}endus {G}eoscience},
  volume = {348},
  numero = {2},
  pages = {127--137},
  ISSN = {1631-0713},
  year = {2016},
  DOI = {10.1016/j.crte.2015.10.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066760},
}