@article{fdi:010067612,
  title = {{C}rustal evolution of the {P}aleoproterozoic {B}irimian terranes of the {B}aoule-{M}ossi domain, southern {W}est {A}frican {C}raton : {U}-{P}b and {H}f-isotope studies of detrital zircons},
  author = {{P}arra-{A}vila, {L}. {A}. and {B}elousova, {E}. and {F}iorentini, {M}. {L}. and {B}aratoux, {L}enka and {D}avis, {J}. and {M}iller, {J}. and {M}c{C}uaig, {T}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {P}aleoproterozoic {B}aoule-{M}ossi domain of the southern {W}est {A}frican {C}raton is regarded as the result of juvenile crust formation during the 2.3-1.9 {G}a period. {H}owever, little is known about the complex processes that led to the formation of this highly metal endowed lithospheric block. {H}ence, in order to better constrain its geodynamic evolution, small catchments within modern drainage basins of the {N}iger and {B}ani {R}ivers were sampled for detrital zircons for {U}-{P}b and {H}f-isotope analyses, following {T}errane{C}hron ({R}) methodology. {T}he study area stretches across southern {M}ali over 40,000 km(2) between the {Y}anfolila (west) and {S}yama (east) belts, from where more than 1000 zircons representing eight different sub-basins have been analyzed. {T}he results of this study identified 2 main zircon age populations. {T}he older population with ages between 3.6 and 2.7 {G}a represents approximately 10% of the total of the analyzed zircons, and is mainly restricted to the western margin of the study area across the {Y}anfolila {B}elt sampling sites. {T}he {H}f-isotope data from this zircon population yielded model ages between 3.7 and 3.6 {G}a and suggest a common evolution. {C}onversely, the main zircon population is dominated by {P}aleoproterozoic age zircons ranging between 2.4 and 2.1 {G}a. {M}ain peaks within this age group were identified at ca. 2161, 2121 and 2084 {M}a, and minor peaks at ca. 2343, 2263 and 2200 {M}a. {T}he {H}f-isotope data of this age group indicate that the zircons are derived from a mainly juvenile source, but were contaminated with crustal rocks potentially as old as 2.8 {G}a. {H}owever, a group (approximately 10%) of {P}aleoproterozoic age zircons, which is interpreted to be the result of stream sediment transport from distal sources or the result of multiple cycles of sedimentation, displays a minor but significant older component, up to 4.0 {G}a. {T}his study also highlights the occurrence of >2.7 {G}a detrital zircons, which are of an unknown source as no rock unit in the region has been identified to yield similar {A}rchean ages. {M}oreover, some {P}aleoproterozoic zircons show {H}f-isotope composition that indicates reworking of an older crustal component. {A}lthough zircons of the {B}aoule-{M}ossi domain generally confirm its juvenile origin, they also indicate reworking of an older crust at a much larger scale than previously recognized. {T}he identification of {A}rchean zircons in the region argues for greater interaction between the {B}aoule-{M}ossi domain and the {A}rchean {K}enema-{M}an domain.},
  keywords = {{T}errane{C}hron ({R}) ; {U}-{P}b zircon dating ; {L}u-{H}f isotopes ; {S}outhern {W}est {A}frica {C}raton ; {B}aoule-{M}ossi domain ; {M}ali ; {AFRIQUE} {DE} {L}'{OUEST}. {MALI}},
  booktitle = {},
  journal = {{P}recambrian {R}esearch},
  volume = {274},
  numero = {},
  pages = {25--60},
  ISSN = {0301-9268},
  year = {2016},
  DOI = {10.1016/j.precamres.2015.09.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067612},
}