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The early interaction between the Caribbean plateau and the NW South American Plate

Vallejo, Cristian ; Spikings, Richard A. ; Luzieux, Leonard ; Winkler, Wilfried ; Chew, David and Page, Laurence LU (2006) In Terra Nova: the European journal of geosciences 18(4). p.264-269
Abstract
The determination of accurate and precise ages for the timing of collision between oceanic plateaus and continental crust requires an understanding of how the indenting and buttressing plates respond to the collision. We present geochronological, thermochronological, geochemical and isotopic analyses of magmatic rocks from the Ecuadorian Andes, which relate to the collision of the Late Cretaceous Caribbean Plateau and Great Arc sequence with NW South America. The cessation of subduction magmatism during 65-64 Ma beneath the eastern edge of Caribbean Plateau was synchronous with accelerated surface uplift and exhumation within the buttressing continental margin during 75-65 Ma. We interpret this as the collision of the leading edge of the... (More)
The determination of accurate and precise ages for the timing of collision between oceanic plateaus and continental crust requires an understanding of how the indenting and buttressing plates respond to the collision. We present geochronological, thermochronological, geochemical and isotopic analyses of magmatic rocks from the Ecuadorian Andes, which relate to the collision of the Late Cretaceous Caribbean Plateau and Great Arc sequence with NW South America. The cessation of subduction magmatism during 65-64 Ma beneath the eastern edge of Caribbean Plateau was synchronous with accelerated surface uplift and exhumation within the buttressing continental margin during 75-65 Ma. We interpret this as the collision of the leading edge of the Caribbean Plateau and arc sequence with the South American Plate at 75-65 Ma. A U/Pb (zircon) SHRIMP age of 87.10 +/- 1.66 (2 sigma) Ma, yielded by an accreted fragment of the plateau, precludes previous estimates of collision at 85-80 Ma if the plateau erupted above the Galapagos hotspot. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Terra Nova: the European journal of geosciences
volume
18
issue
4
pages
264 - 269
publisher
Wiley-Blackwell
external identifiers
  • wos:000239161800005
  • scopus:33746185450
ISSN
0954-4879
DOI
10.1111/j.1365-3121.2006.00688.x
language
English
LU publication?
yes
id
039102ad-e650-478d-8321-9a61e725809d (old id 401505)
date added to LUP
2016-04-01 17:05:55
date last changed
2021-10-03 04:43:17
@article{039102ad-e650-478d-8321-9a61e725809d,
  abstract     = {The determination of accurate and precise ages for the timing of collision between oceanic plateaus and continental crust requires an understanding of how the indenting and buttressing plates respond to the collision. We present geochronological, thermochronological, geochemical and isotopic analyses of magmatic rocks from the Ecuadorian Andes, which relate to the collision of the Late Cretaceous Caribbean Plateau and Great Arc sequence with NW South America. The cessation of subduction magmatism during 65-64 Ma beneath the eastern edge of Caribbean Plateau was synchronous with accelerated surface uplift and exhumation within the buttressing continental margin during 75-65 Ma. We interpret this as the collision of the leading edge of the Caribbean Plateau and arc sequence with the South American Plate at 75-65 Ma. A U/Pb (zircon) SHRIMP age of 87.10 +/- 1.66 (2 sigma) Ma, yielded by an accreted fragment of the plateau, precludes previous estimates of collision at 85-80 Ma if the plateau erupted above the Galapagos hotspot.},
  author       = {Vallejo, Cristian and Spikings, Richard A. and Luzieux, Leonard and Winkler, Wilfried and Chew, David and Page, Laurence},
  issn         = {0954-4879},
  language     = {eng},
  number       = {4},
  pages        = {264--269},
  publisher    = {Wiley-Blackwell},
  series       = {Terra Nova: the European journal of geosciences},
  title        = {The early interaction between the Caribbean plateau and the NW South American Plate},
  url          = {http://dx.doi.org/10.1111/j.1365-3121.2006.00688.x},
  doi          = {10.1111/j.1365-3121.2006.00688.x},
  volume       = {18},
  year         = {2006},
}