@article{fdi:010091867,
  title = {{C}rustal thickness constraints on the geodynamic evolution of the {G}alapagos {V}olcanic {P}rovince},
  author = {{S}allar{\`e}s, {V}alenti and {C}harvis, {P}hilippe},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e developed a simple quantitative framework based on crustal thickness estimations along the {C}arnegie, {C}ocos and {M}alpelo ridges, to place first-order constraints on the tectonic evolution of the {G}alapagos {V}olcanic {P}rovince and on the along-axis intensity of the {G}alapagos melt anomaly during the last



20 m.y. {O}ur results suggest that the {C}ocos-{N}azca spreading centre has migrated northwards at 26±4 km/m.y. with respect to the {G}alapagos hotspot ({GHS}) during this period of time. {A}t ?20 m.y., the {GHS} was approximately ridge-centered, and thus the along-axis intensity of the melt anomaly at this time



was the maximum. {A}t ?11.5 m.y. the hotspot was located 106±27 km north of the spreading center, and the along-axis intensity of the melt anomaly was 0.54±0.04 of that estimated at 20 {M}a. {A}t present day it is located at ?190 km south of the spreading center and the along-axis intensity is only 0.19±0.03 of that estimated at 20 {M}a. {T}hese results are used to reconstruct the relative position between the {GHS} and the {C}ocos-{N}azca {S}preading {C}enter. {T}he spreading center passed over the {GHS} for the last time at 7.4±1.3 {M}a. {T}he {P}anama fracture zone was initiated at 8.9±1.6 {M}a, leading to the separation between the {C}ocos and {M}alpelo ridges. {T}he present configuration of the {G}alapagos {V}olcanic {P}rovince and the plate velocities are consistent with symmetric spreading with a mean full spreading rate of ?60 km/m.y. along the {CNSC} during the last 20 m.y. {A} melt flux for excess crustal production of 9.4±5.1 m3/s is obtained for the {G}alapagos melt anomaly at 20 {M}a, implying that the maximum potential intensity of the {G}alapagos plume is similar to that of the {I}celandic plume and twice smaller than the {H}awaiian one.},
  keywords = {{COLON} {ARCHIPIELAGO} ; {CARNEGIE} ; {COCOS} ; {MALPELO}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {214},
  numero = {3-4},
  pages = {545--559},
  ISSN = {0012-821{X}},
  year = {2003},
  DOI = {10.1016/s0012-821x(03)00373-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091867},
}