@article{PAR00000645,
  title = {{A}ge and significance of ruby-bearing marble from the {R}ed {R}iver {S}hear {Z}one, northern {V}ietnam},
  author = {{G}arnier, {V}. and {O}hnenstetter, {D}. and {G}iuliani, {G}. and {M}aluski, {H}. and {D}eloule, {E}. and {T}rong, {T}. {P}. and {V}an, {L}. {P}. and {Q}uang, {V}. {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}arble-hosted ruby deposits occur in the {L}o {G}am tectonic zone along the northeastern flank of the {D}ay {N}ui {C}on {V}oi {R}ange in the {R}ed {R}iver {S}hear {Z}one, in the northern part of {V}ietnam. {C}rystals of zircon included in ruby and spinel from {L}uc {Y}en and {A}n {P}hu deposits were dated in situ by the {U}-{P}b method with an ion microprobe. {T}he patchy zoning of the zircon crystals and the wide range of ages (266-38 {M}a) provide evidence for a complex metamorphic history, with at least two main thermal events: (1) {Z}ircon included in spinel crystals probably crystallized during the {P}ermian (256.6 +/- 9.4 {M}a), with a possible reopening of their {U}-{P}b system in the early {T}riassic (231.7 +/- 5.6 {M}a). (2) {R}uby formed at about 38 {M}a when the {R}ed {R}iver {S}hear {Z}one was the site of ductile deformation during the peak of metamorphism. {T}he dating of zircon and phlogopite syngenetic with ruby documents the temporal relationship between high-temperature metamorphism and the cooling history of the {R}ed {R}iver metamorphic belt. {R}uby deposits hosted by marble sequences, in central and southeastern {A}sia seem to be an excellent marker; they allow an interpretation of the timing of the activity of {C}enozoic structures linked to the collision between {I}ndian and {E}urasian continents.},
  keywords = {ruby deposits ; marble ; zircon ; in situ {U} {P}b dating ; {C}enozoic ages ; ion probe data ; electron microprobe data ; cathodoluminescence ; northern {V}ietnam},
  booktitle = {},
  journal = {{C}anadian {M}ineralogist},
  volume = {43},
  numero = {{P}art 4},
  pages = {1315--1329},
  ISSN = {0008-4476},
  year = {2005},
  DOI = {10.2113/gscanmin.43.4.1315},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00000645},
}