@article{fdi:010074907,
  title = {{T}ransport of volatile-rich melt from the mantle transition zone via compaction pockets : implications for mantle metasomatism and the origin of alkaline lavas in the {T}urkish-{I}ranian plateau},
  author = {{S}oltanmohammadi, {A}. and {G}r{\'e}goire, {M}. and {R}abinowicz, {M}. and {G}erbault, {M}uriel and {C}euleneer, {G}. and {R}ahgoshay, {M}. and {B}ystricky, {M}. and {B}enoit, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study is based on an integrated approach combining results from petrology, geophysics and modeling to explain the origin of continental alkaline magmatism in the {T}urkish-{I}ranian plateau ({TIP}). {S}ynthesis of the petrological and chemical characteristics of the alkaline magmatism of the {TIP}, extending from 80 {M}a to the present, shows that the alkaline lavas can be classified as ultrapotassic ({UK}), transitional potassic to sodic ({TK}) and sodic-high-potassium ({HK}) and sodic-low-potassium ({LK}) lavas, all derived from a heterogeneous mantle source. {S}ynthesis of the most recent seismic tomography images for the region shows the presence of a large set of low-velocity elliptical bodies, similar to 100 km in size, referred to as '{C}ompaction {P}ockets' ({CP}), scattered from the top of the mantle transition zone ({MTZ}) to the base of the lithosphere beneath the {TIP}. {A} model is developed, which shows that the low velocities in these {C}ompaction {P}ockets result from the percolation and concentration of volatile-rich melts liberated from the {MTZ}. {T}hese volatile-rich melts interact with their surrounding mantle, which has a temperature similar to 100 degrees {C} lower than the usual subcontinental mantle adiabat. {I}t is argued that this results in the precipitation of hydrated and carbonated mineral phases (at similar to 8-6.5 {GP}a and <4 {GP}a, respectively), and partial melting of the resulting heterogeneous mantle (6.5-4 {GP}a) at critical depths. {M}elt extraction via dykes occurs when the top of the {C}ompaction {P}ocket successively crosses these critical depths. {T}he three groups of {UK}, sodic-{LK} and sodic-{HK} lavas may be linked to distinct melt extraction events. {T}he chemical composition of {TK} melts may result from the mixing of {UK} and sodic melts, or partial melting of metasomatized mantle at lithospheric depths. {T}he '{C}ompaction {P}ocket' model offers a robust new concept to explain alkaline magmatism in the context of continental orogeny.},
  keywords = {{C}ompaction {P}ocket ; volatile-rich melt ; alkaline lava ; mantle transition zone ; orogenic belt ; {IRAN} ; {TURQUIE}},
  booktitle = {},
  journal = {{J}ournal of {P}etrology},
  volume = {59},
  numero = {12},
  pages = {2273--2309},
  ISSN = {0022-3530},
  year = {2018},
  DOI = {10.1093/petrology/egy097},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074907},
}