@article{PAR00029552,
  title = {{P}etrogenesis of volcanogenic sedimentary lithium ore in the neogene {M}acusani volcanic field, {P}uno, {P}eru},
  author = {{R}amirez-{B}riones, {J}. {S}. and {T}orro, {L}. and {C}hiaradia, {M}. and {L}aurent, {O}. and {M}androu, {S}. and {T}avazzani, {L}. and {C}helle-{M}ichou, {C}. and {V}allance, {J}. and {B}aby, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he recently discovered {F}alchani volcanogenic sedimentary lithium deposit, situated within the {N}eogene {M}acusani {V}olcanic {F}ield in {SE} {P}eru, represents one of the world's most significant resources of this metal. {T}he {L}i ore is mainly hosted in the so-called lithium-rich tuff, a tuffaceous mudstone that is sandwiched between two {L}i-rich volcaniclastic units ({U}pper and {L}ower {B}reccia). {T}he major and trace element composition of the {L}i-ore units differs from that of previously reported ash-flow tuff in the {M}acusani {V}olcanic {F}ield. {R}ather, it approximates the chemistry of highly evolved peraluminous obsidian glasses, known as macusanite, and exhibits the characteristic geochemical fingerprint of peraluminous rare-metal granites and {L}i-{C}s-{T}a pegmatites. {T}he parental magmas of the {L}i-ore units have been modeled as containing <25% of a mantle component with the isotopic signature of potassic to ultra-potassic basaltic melts. {T}he remaining is attributed to partial melts of {P}roterozoic and {P}aleozoic paragneiss and metapelites. {H}igh fluorine activity in the melt lowered the solidus and delayed fluid-melt immiscibility, promoting high degrees of differentiation through fractional crystallization. {P}re-eruptive metasomatic processes in the upper part of the crystal mush could have increased the concentration of {L}i and other fluid-mobile elements. {C}ontrary to many volcanogenic sedimentary lithium deposits worldwide, in situ post-depositional metasomatic processes associated with the formation of secondary clay and zeolite assemblages did not result in lithium enrichment, but in its partial leaching. {F}alchani represents a first documentation of a volcanogenic sedimentary deposit where the primary lithium enrichment to economic grades was related to pre-eruptive magmatic processes.},
  keywords = {{C}entral andes ; macusanite ; peraluminous ; rare metal granites ; volcanogenic sedimentary lithium deposits ; {PEROU}},
  booktitle = {},
  journal = {{J}ournal of {P}etrology},
  volume = {66},
  numero = {5},
  pages = {egaf041},
  ISSN = {0022-3530},
  year = {2025},
  DOI = {10.1093/petrology/egaf041},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00029552},
}