@article{PAR00007997,
  title = {{I}nsights into the origin of primitive silica-undersaturated arc magmas of {A}oba volcano ({V}anuatu arc)},
  author = {{S}orbadere, {F}. and {S}chiano, {P}ierre and {M}etrich, {N}. and {G}araebiti, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}oba picrites in {V}anuatu arc ({S}outhwestern {P}acific) offer the opportunity to address the question of the origin of {S}i-undersaturated arc magmas, through the geochemical study of their olivine-hosted melt inclusions. {T}hese latter delineate a differentiation trend of calc-alkaline silica-undersaturated basalts, with typical trace-element patterns of arc magmas. {T}he most primitive melt inclusions, preserved in olivines with {F}o a parts per thousand yen 89, have normative nepheline compositions with {C}a{O}/{A}l2{O}3 > 0.8, but belong to three distinct populations differing in their enrichment or depletion in {LILE}, {C}l, and alkalis ({R}b, {K}). {T}he dominant population is characterized by medium-{LILE} concentrations ({L}a/{Y}b similar to 7-8) and represents the parental magma of the {A}oba lavas. {T}he two others ({L}a/{Y}b similar to 20 and 2) are either significantly enriched or extremely depleted in {LILE}, {C}l, and alkalis. {T}his compositional variability of primitive magma batches requires the multi-stage mixing between melts generated by partial melting of both peridotite and clinopyroxene-rich lithologies. {M}edium-{LILE} magma derives from the mixing between peridotite- and clinopyroxenite-derived melts, whereas the high- and low-{LILE} melts involve amphibole-bearing and amphibole-free clinopyroxenite sources, respectively.},
  keywords = {{P}icrite ; {V}anuatu arc ; {A}oba {I}sland ; {S}i-undersaturated melts ; {M}elt inclusions},
  booktitle = {},
  journal = {{C}ontributions to {M}ineralogy and {P}etrology},
  volume = {162},
  numero = {5},
  pages = {995--1009},
  ISSN = {0010-7999},
  year = {2011},
  DOI = {10.1007/s00410-011-0636-1},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007997},
}