@article{fdi:010086467,
  title = {{A}rchean to {P}aleoproterozoic crustal evolution in the {S}assandra-{C}avally domain ({C}{\^o}te d'{I}voire, {W}est {A}frica) : insights from {H}f and {U}-{P}b zircon analyses},
  author = {{K}offi, {A}. {Y}. and {T}hebaud, {N}. and {K}ouamelan, {A}. {N}. and {B}aratoux, {L}enka and {B}ruguier, {O}. and {V}anderhaeghe, {O}. and {P}itra, {P}. and {K}emp, {A}. {I}. {S}. and {E}vans, {N}. {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}rustal evolution in the south {W}est {A}frican {C}raton is dominated by a significant input of juvenile material into the crust at ca. 2.1 {G}a and it remains unclear how much of the {P}aleoproterozoic continental mass was influenced by the presence of pre-existing {A}rchean crustal domains. {T}he {S}assandra-{C}avally ({SASCA}, {C}{\^o}te d'{I}voire) domain is strategically located east of the {S}assandra shear zone at the transition of the {P}aleoproterozoic and {A}rchean terranes of the {L}eo-{M}an shield. {C}ombined {U}-{P}b and {L}u-{H}f isotopic analyses by {LA}-({MC}-){ICP}-{MS} were acquired on zircon grains extracted from migmatitic gneisses, metasedimentary rocks and a granitic intrusion. {T}he migmatitic gneisses, yield {A}rchean ages between ca. 3330 and 2810 {M}a with epsilon {H}f ranging from -9.4 to + 3.3 and a metamorphic age at 2076 +/- 6 {M}a. {T}hey are tentatively interpreted as orthogneisses extracted from the mantle during the {P}aleoarchean and reworked substantially in the {M}esoarchean. {D}etrital zircon grains from metasedimentary units adjacent to the {A}rchean migmatitic gneisses yield ages ranging from ca. 2213 to 2088 {M}a with epsilon {H}f ranging from + 0.0 to + 5.5, indicating derivation from juvenile {P}aleoproterozoic source rocks. {A} granite intrusion was dated within uncertainty of the metamorphic age at 2084 +/- 6 {M}a. {I}t exhibits a hybrid isotopic signature with epsilon {H}f forming two distinct clusters between -4.9 and -8.5, and between + 2.2 and + 6.5 for inherited zircon grains dated between ca. 2343 to 2100 {M}a. {T}he near continuous {U}-{P}b age record from this early {M}esoarchean event to the {N}eoarchean is associated with constant initial 176{H}f/177{H}f suggesting for an ancient lead loss event at ca. 2800 {M}a or a prolonged period of zircon dissolution/precipitation and/or crystallization. {T}his early period is followed by peaks of zircon dates highlighting crustal extraction during the {E}oeburnean (ca. 2250 to 2150 {M}a) and {E}burnean orogenies (ca. 2140 to 2100 {M}a). {T}he absence of detrital zircon of the ages similar to those of migmatitic gneisses (-3200-2800 {M}a) in {P}aleoproterozoic metasediments suggests their deposition distal from the {A}rchean terranes followed by a tectonic assemblage of the {SASCA} domain during the later stages of the {E}burnean orogeny.},
  keywords = {{Z}ircon geochronology ; {U}-{P}b and {L}u-{H}f isotopes ; {J}uvenile crustal growth ; {C}rustal growth and reworking ; {A}rchean ; {W}est {A}frican {C}raton ; {C}{\^o}te d'{I}voire ; {COTE} {D}'{IVOIRE}},
  booktitle = {},
  journal = {{P}recambrian {R}esearch},
  volume = {382},
  numero = {},
  pages = {106875 [23 p.]},
  ISSN = {0301-9268},
  year = {2022},
  DOI = {10.1016/j.precamres.2022.106875},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086467},
}