@article{fdi:010077049,
  title = {{T}he {E}burnean magmatic evolution across the {B}aoule-{M}ossi domain : geodynamic implications for the {W}est {A}frican {C}raton},
  author = {{P}arra-{A}vila, {L}. {A}. and {B}aratoux, {L}enka and {E}glinger, {A}. and {F}iorentini, {M}. {L}. and {B}lock, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}aleoproterozoic igneous suites across the {W}est {A}frican {C}raton have previously been classified as {T}onalite-{T}rondhjemite-{G}ranodiorite ({TTG})-like, and in many cases this association has been used as a line of evidence to associate the tectonic evolution of the region with {A}rchean-style vertical accretion tectonics. {M}ore recently, these felsic intrusions have been classified to have evolved from calc-alkaline to more potassic granitic rocks. {T}he present study builds upon recent geochronological and isotopic studies by presenting a geochemical characterization of granitic rocks from the {B}aoule-{M}ossi domain, particularly from {B}urkina {F}aso, southern {M}ali and eastern {G}uinea, during the 2250-2000 {M}a period. {T}he studied samples were classified to be predominately magnesian, alkali-calcic to calc-alkalic and metaluminous to peraluminous. {T}he described characterization is similar to the main portion of {C}ordillera batholiths or inboard from the mentioned type batholiths or with plutons derived from over-thickened crust equivalent to {S} and {I} type pluton granites. {A} small portion of the studied samples were found to be predominately ferroan and alkali-calcic to calc-alkalic, which are commonly associated with {A} type granites. {T}race element characteristics suggest that the studied rocks originated from heterogeneous magmas which are characterized by {REE} anomalies consistent with an arc type system that was subject to crustal shortening and thickening. {S}patio-temporal characterization of the geochemical data presented as part of this study shows that magmatism evolved from east to west and from older to younger. {E}astern samples are predominately older (> ca. 2100 {M}a), in general are more sodic and present ({L}a/{Y}b)({N}) ratios that are equivalent to the ratios present in {A}rchean {TTG}s. {Y}ounger samples (< ca. 2100 {M}a) which are predominately concentrated in the western portion of the study area are more potassic. {T}hese geochemical differences from east to west support the notion that the {B}aoule-{M}ossi domain is the result of the amalgamation of at least two crustal blocks. {T}hese blocks are interpreted to have been indented by the {A}rchean {K}enema-{M}an domain after ca. 2100 {M}a, as suggested by a change in the {N}a2{O}/{K}2{O} ratio that indicates an evolution from magmatic accretion/crustal growth to crustal reworking.},
  keywords = {{P}aleoproterozoic ; {B}aoule-{M}ossi domain ; {C}rustal growth ; {G}eochemistry ; {BURKINA} {FASO} ; {MALI} ; {GUINEE} ; {AFRIQUE} {DE} l'{OUEST}},
  booktitle = {},
  journal = {{P}recambrian {R}esearch},
  volume = {332},
  numero = {},
  pages = {art. 105392 [20 p.]},
  ISSN = {0301-9268},
  year = {2019},
  DOI = {10.1016/j.precamres.2019.105392},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077049},
}