@article{PAR00009442,
  title = {{O}smium isotope systematics of historical lavas from {P}iton de la {F}ournaise ({R}{\'e}union {I}sland, {I}ndian {O}cean)},
  author = {{S}chiano, {P}ierre and {D}avid, {K}. and {V}lastelic, {I}. and {G}announ, {A}. and {K}lein, {M}. and {N}auret, {F}. and {B}onnand, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{R}e-{O}s isotope and elemental data have been obtained for 20 historical picrites and basalts (1931-2006) from the {P}iton de la {F}ournaise volcano on {R},union {I}sland and two old (> 0.78 {M}a) cumulates from a drill hole in the eastern part of the volcano. {T}he {O}s-187/{O}s-188 ratios of the historical lava samples, selected to cover the {M}g{O} concentration and {P}b isotopic ranges of {P}iton de la {F}ournaise lavas, range from 0.1311 to 0.1374. {T}his result, together with previous results on 66-{M}a-old lavas from the {D}eccan {T}raps ({A}ll{S}gre et al. in. {E}arth {P}lanet {S}ci {L}ett, 170:197-204, 1999), supports the idea that the {O}s isotopic signature of the {R},union plume is relatively uniform and is at the less radiogenic end of the ocean island basalt spectrum. {I}n detail, lavas erupted before 1992 seem to have higher {O}s-187/{O}s-188 than the lavas erupted after the 1992-1998 period of quiescence. {C}omparison of {O}s-187/{O}s-188 ratios with {P}b, {S}r and {N}d isotopic data on the same set of samples shows no correlation between {O}s and {S}r-{N}d isotopes, whereas a broad positive relationship with {P}b isotopes is observed, which is interpreted to reflect coupled fractionation of {R}e/{O}s and {U}-{T}h/{P}b in the mantle due to the partitioning of {P}b and {O}s into sulphides. {L}avas inferred to be recording the {O}s isotopic signature of the {R},union plume source have higher {O}s-187/{O}s-188 ratios than the primitive mantle values. {W}hile this might be ascribed to melting of a lithologically heterogeneous source comprising recycled oceanic crust and/or continental sediment, the expected coupled {O}s-{S}r-{N}d-{P}b isotopic variations are not observed. {I}t is thus proposed that the mantle source for {P}iton de la {F}ournaise has inherently slightly radiogenic {O}s-187/{O}s-188 values that could reflect a mantle domain almost isolated from recycling processes.},
  keywords = {{G}eochemistry ; {R}eunion ; {P}iton de la {F}ournaise ; {O}s isotopes ; {P}lume composition},
  booktitle = {},
  journal = {{C}ontributions to {M}ineralogy and {P}etrology},
  volume = {164},
  numero = {5},
  pages = {805--820},
  ISSN = {0010-7999},
  year = {2012},
  DOI = {10.1007/s00410-012-0774-0},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00009442},
}