@article{fdi:010092232,
  title = {{M}agnetic susceptibility controlled by climate-driven weathering intensity},
  author = {{A}ubineau, {J}. and {A}ntonio, {P}. {Y}. {J}. and {E}l {B}amiki, {R}. and {P}arat, {F}. and {C}amps, {P}. and {R}aji, {O}. and {J}ourani, {E}. {S}. and {B}odinier, {J}. {L}. and {M}acouin, {M}. and {G}ilder, {S}. and {R}ousse, {S}onia and {S}{\'e}ranne, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}agnetic susceptibility ({MS}) variations are commonly attributed to eustatic and/or climatic changes that impact the delivery of fine-grained detrital magnetic minerals. {H}owever, the mechanism responsible for sourcing magnetic minerals from land to the ocean is not fully understood. {B}ulk mineralogy, {R}ietveld refinements of powder {XRD} patterns, and whole-rock geochemistry, combined with a {MS} investigation across a similar to 290 m-thick {U}pper {C}retaceous/{P}aleogene sedimentary sequence at {E}rguita, {M}orocco, imply that iron is exclusively detrital in origin. {M}oreover, {MS} fluctuations occurred independently from depositional setting and sea-level variations. {R}ock magnetism investigations further show that a complex assemblage of ferromagnetic sensu lato minerals is recorded in the {E}rguita sedimentary section, and a proportion of more or less oxidized magnetite supplied to the depositional setting controls the {MS} variations. {T}his study chronicles that the weathering of the {A}nti-{A}tlas crystalline basement led to the supply of detrital {F}e-bearing phyllosilicates and ferromagnetic (sensu lato) {F}e-oxides to the eastern passive margin of the {A}tlantic {O}cean from the {L}ate {C}retaceous to the mid-{P}aleogene. {H}igher weathering intensity drove up the detrital magnetic material in all lithologies, which, in turn, increased the {MS} signal. {I}mportantly, this model nicely coincides with the climatic upheavals of the {P}aleogene. {W}e propose that this unrecognized link between {MS} and climate-driven weathering intensity is paramount to unraveling the origin of the low {MS} interval below the {C}retaceous-{P}aleogene boundary. {C}limate cooling resulting in reduced weathering rather than a global acidification triggered by {P}hase 2 of {D}eccan volcanism could help explain the {MS} trend at that time.},
  keywords = {{M}agnetic susceptibility ; weathering ; climate ; {C}retaceous / {P}aleogene ; {E}rguita ; {M}orocco ; {S}usceptibilit{\'e} magn{\'e}tique ; alt{\'e}ration ; climat ; {C}r{\'e}tac{\'e} ; {P}al{\'e}og{\`e}ne ; {M}aroc ; {MAROC}},
  booktitle = {},
  journal = {{BSGF} : {E}arth {S}ciences {B}ulletin},
  volume = {195},
  numero = {},
  pages = {25 [19 ]},
  ISSN = {0037-9409},
  year = {2024},
  DOI = {10.1051/bsgf/2024025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092232},
}