@article{fdi:010019064, title = {{E}meralds in the {E}astern cordillera of {C}olombia : two tectonic settings for one mineralization}, author = {{B}ranquet, {Y}. and {L}aumonier, {B}. and {C}heilletz, {A}. and {G}iuliani, {G}aston}, editor = {}, language = {{ENG}}, abstract = {{C}olombian emeralds are formed through a hydrothermal-sedimentary process. {O}n the western side of the {E}astern {C}ordillera, the deposits are linked by tear faults and associated thrusts developed during a compressive tectonic phase that occurred at the time of the {E}ocene-{O}ligocene boundary, prior to the major uplift of the {C}ordillera during the {A}ndean phase (middle {M}iocene). {O}n the eastern side of the {C}ordillera, emerald mineralization occurred earlier, at the time of the {C}retaceous-{T}eritary boundary, during a thin-skinned extensional tectonic event linked to evaporite dissolution. {T}his event predates the {A}ndean phase, during which this part of the chain was folded and thrust over the {L}lanos foreland. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{MINERAI} ; {GISEMENT} {ENDOGENE} ; {GEOCHIMIE} ; {MINERALISATION} ; {EVAPORITE} ; {TECTONIQUE} ; {CRETACE} ; {TERTIAIRE} ; {EOCENE} ; {OLIGOCENE} ; {EMERAUDE} ; {COLOMBIE}}, booktitle = {}, journal = {{G}eology}, volume = {27}, numero = {7}, pages = {597--600}, ISSN = {0091-7613}, year = {1999}, DOI = {10.1130/0091-7613(1999)027<0597:{EITECO}>2.3.{CO};2}, URL = {https://www.documentation.ird.fr/hor/fdi:010019064}, }