@article{fdi:010053860,
  title = {{F}e isotope and trace element geochemistry of the {N}eoproterozoic syn-glacial {R}apitan iron formation},
  author = {{H}alverson, {G}. {P}. and {P}oitrasson, {F}ranck and {H}offman, {P}. {F}. and {N}edelec, {A}. and {M}ontel, {J}. {M}. and {K}irby, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e have measured the iron isotope compositions and trace element concentrations of a suite of iron formation ({IF}) samples from the {N}eoproterozoic {R}apitan {G}roup, which was deposited during the older of two glacial episodes recorded in the {W}indermere {S}upergroup of the northern {C}anadian {C}ordillera. {L}ike most other {N}eoproterozoic examples, iron in the {R}apitan {IF} resides almost exclusively as hematite. {T}his mineralogical simplicity compared to {A}rchean and {P}aleoproterozoic banded iron formations is attributed to a limited supply of organic carbon to the {R}apitan glacial ocean that inhibited diagenetic production of reduced iron phases. {S}edimentological considerations indicate that the {R}apitan {IF} was deposited during a rise in relative sea level related to a period of glacial advance and isostatic subsidence. {T}race element data, including rare earth element plus yttrium ({REE} + {Y}) patterns, suggest an anoxic deep ocean dominated by low-temperature hydrothermal input and capped by a weakly oxic surface ocean. {T}he iron isotope data show a trend of increasing delta(57){P}e (versus {IRMM}-14) up-section from similar to-0.7 parts per thousand to 1.2 parts per thousand, corresponding to a shift from a muddy {IF} facies to a dominantly jaspilitic {IF} facies. {T}his distinct isotopic pattern likely records a steep isotopic gradient across the iron chemocline in {R}apitan seawater.},
  keywords = {(banded) iron formation ; iron isotopes ; {R}apitan {G}roup ; {N}eoproterozoic glaciation ; rare earth elements},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {309},
  numero = {1-2},
  pages = {100--112},
  ISSN = {0012-821{X}},
  year = {2011},
  DOI = {10.1016/j.epsl.2011.06.021},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053860},
}