@article{fdi:010058813,
  title = {{S}patial and temporal evolution of {L}iassic to {P}aleocene arc activity in southern {P}eru unraveled by zircon {U}-{P}b and {H}f in-situ data on plutonic rocks},
  author = {{D}emouy, {S}. and {P}aquette, {J}. {L}. and de {S}aint {B}lanquat, {M}. and {B}enoit, {M}. and {B}elousova, {E}. {A}. and {O}'{R}eilly, {S}. {Y}. and {G}arcia, {F}. and {T}ejada, {L}. {C}. and {G}allegos, {R}. and {S}emp{\'e}r{\'e}, {T}hierry},
  editor = {},
  language = {{ENG}},
  abstract = {{C}ordilleran-type batholiths are built by prolonged arc activity along active continental margins and provide detailed magmatic records of the subduction system evolution. {T}hey complement the stratigraphic record from the associated forearcs and backarcs. {W}e performed in-situ {U}-{P}b geochronology and {H}f isotope measurements on zircon grains from a large set of plutonic rocks from the {C}oastal {B}atholith in southern {P}eru. {T}his batholith emplaced into the {P}recambrian basement and the {M}esozoic sedimentary cover. {W}e identify two major periods of voluminous arc activity, during the {J}urassic (200-175 {M}a) and the {L}ate {C}retaceous-{P}aleocene (90-60 {M}a). {J}urassic arc magmatism mainly resulted in the emplacement of a dominantly mafic suite with epsilon({H}f) values ranging from -9.5 to +0.1. {P}ublished ages south of the {A}requipa area suggest that the arc migrated southwestward out of the study area during the {M}iddle {J}urassic. {A}fter a magmatic gap of 85 {M}a, arc activity abruptly resumed 90 {M}a ago in {A}requipa. {I}ntrusive bodies emplaced into both basement and older {J}urassic intrusions and strata. {T}his activity culminated between 70 and 60 {M}a with the emplacement of very large volumes of dominantly quartz-dioritic magmas. {T}his last episode may be considered as a flare-up event, characterized by intense magmatic transfers into the crust and rapid relief creation. {T}he {L}ate {C}retaceous-{P}aleocene initial {EH}( are shifted toward positive values (up to +3.3 and +2.6) compared to the {J}urassic ones, indicating either a larger input of juvenile magmas, a lesser interaction with the ancient crust, or an increase of re-melting of young mantle-derived mafic lower crust. {T}hese magmatic fluxes with juvenile component are coeval with the onset of the crustal thickening at 90 {M}a and represent a significant ontribution to the formation of the continental crust in this area.},
  keywords = {{A}ndes ; {B}atholith ; {F}lare-up ; {C}rustal growth ; {Z}ircon ; {A}ges ; {PEROU} ; {ANDES}},
  booktitle = {},
  journal = {{L}ithos},
  volume = {155},
  numero = {},
  pages = {183--200},
  ISSN = {0024-4937},
  year = {2012},
  DOI = {10.1016/j.lithos.2012.09.001},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058813},
}