Multiple plume events in the genesis of the peri‐Caribbean Cretaceous oceanic plateau province

Lapierre, Henriette; Bosch, Delphine; Dupuis, Vincent; Polvé, Mireille; Maury, René C.; Hernandez, Jean; Monié, Patrick; Yeghicheyan, Delphine; Jaillard, Étienne; Tardy, Marc; Lépinay, Bernard Mercier de; Mamberti, Marc; Desmet, Alain; Keller, Francine; Sénebier, François

doi:10.1029/1998jb900091

Cited by 96 publications

(90 citation statements)

References 56 publications

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“…9). The fact that the eastern and western units of the Pallatanga terrane experienced distinct tectonic histories during the latest Cretaceous supports the idea that these units belonged to distinct oceanic plateaus, as suggested by their distinct petrographic, geochemical and isotopic signatures (Lapierre et al, 2000;Mamberti, 2001;Mamberti et al, 2003).…”

Section: Discussionmentioning

confidence: 62%

“…We propose to refer to the eastern Pallatanga unit as the San Juan-Multitud terrane, the basement of which has been dated Southwest of Quito at 123±12 Ma (Lapierre et al, 2000), and to the western Pallatanga unit as the Guaranda terrane, of probable early Late Cretaceous age (Mamberti et al, 2003;Fig. 9).…”

Section: Discussion Geodynamic Implicationsmentioning

confidence: 99%

“…-East of 78°50'W , the oceanic magmatic basement consists of deformed Mg-rich basalts, which are assumed to be part of the Caribbean Oceanic Plateau (Lapierre et al, 2000;Mamberti, 2001;Kerr et al, 2002;Mamberti et al, 2003), dated radiometrically elsewhere as Turonian-Coniacian (92-85 Ma, Sinton et al, 1998).…”

Section: Latacunga Traverse (0°40's-1°15'smentioning

confidence: 99%

“…2). Based on geochemistry studies, Lapierre et al (2000) and Mamberti (2001) proposed also to subdivide the Pallatanga terrane into an eastern Early Cretaceous terrane (San Juan-Multitud oceanic plateau), and a western Late Cretaceous terrane, which is part of the Caribbean plate.…”

Section: Introductionmentioning

confidence: 99%

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Stratigraphy of the late Cretaceous–Paleogene deposits of the cordillera occidental of central ecuador: geodynamic implications

Jaillard

Ordóñez²,

Suárez³

et al. 2004

Journal of South American Earth Sciences

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Two accreted oceanic terranes are classically recognized in the Cordillera Occidental of Central Ecuador, the Macuchi island arc to the West, and the Pallatanga oceanic terrane to the East. Detailed stratigraphic studies of the sedimentary cover of the "Pallatanga terrane" show that it actually comprises two terranes. During the late Campanian-early Maastrichtian, the eastern terrane received partially continent-derived turbidites, demonstrating that it was accreted to the Andean margin before mid Campanian times, i.e. 85-80 Ma ago. Meanwhile, the western terrane received fine-grained, pelagic siliceous black cherts indicating that it still belonged to the oceanic realm during mid Campanian-Maastrichtian times. Both series are unconformably overlain by a thick, coarsening upward siliciclastic series of Paleocene age, demonstrating that the western terrane accreted to the eastern one during the late Maastrichtian (≈ 69-65 Ma). The thick Paleocene clastic series recorded the uplift of the Eastern Cordillera, which was triggered by the latter accretion, and enhanced by the Late Paleocene accretion (≈ 58 Ma) of the Piñón oceanic terrane of southern coastal Ecuador.

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Section: Discussionmentioning

confidence: 62%

Section: Discussion Geodynamic Implicationsmentioning

confidence: 99%

Section: Latacunga Traverse (0°40's-1°15'smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stratigraphy of the late Cretaceous–Paleogene deposits of the cordillera occidental of central ecuador: geodynamic implications

Jaillard

Ordóñez²,

Suárez³

et al. 2004

Journal of South American Earth Sciences

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“…1), systematic sampling and analysis of magmatic rocks (Reynaud et al 1999;Lapierre et al 2000;Kerr et al 2002;Mamberti et al 2003Mamberti et al , 2004, associated with radiometric dating (Spikings et al 2001(Spikings et al , 2005Vallejo et al 2006) and stratigraphic and sedimentological studies Toro & Jaillard 2005) allowed to recognise several tectonic units and to refine their Late Cretaceous and Paleogene, pre-to post-accretion, evolution. Two oceanic plateaus have been identified, each one overlain by more differenciated lavas and volcaniclastic deposits of island arc affinity (Fig.…”

Section: Fig 1: Geological Map Of Western Ecuador (Simplified Frommentioning

confidence: 99%

Accreted oceanic terranes in Ecuador: southern edge of the Caribbean Plate?

Jaillard

Lapierre²,

Ordóñez

et al. 2009

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The western part of Ecuador is made from several oceanic terranes, which comprise two oceanic plateaus, of Early (c. 120 Ma) and Late Cretaceous age (c. 90 Ma), respectively. The older oceanic plateau was accreted to the Andean margin in the Late Campanian (c. 75 Ma). Fragments of the Turonian–Coniacian plateau were accreted to the Ecuadorian margin in the Late Maastrichtian (c. 68 Ma, Guaranda terrane) and Late Paleocene (c. 58 Ma, Piñón–Naranjal terrane). The Guaranda terrane received either fine-grained oceanic sediments of Coniacian–Maastrichtian age, or island arc/back-arc volcanic suites of Middle Campanian–Middle Maastrichtian age. The Piñón–Naranjal terrane recorded a comparable history, completed in the Maastrichtian–Paleocene, either by pelagic cherts, or by island arc products (Macuchi arc). The Late Cretaceous plateau of Ecuador is interpreted as part of the Caribbean oceanic plateau (COP), because their evolutions are comparable. If so, the COP was not formed by the Galápagos hotspot, but on the Farallón oceanic plate, south of Ecuador and close to the South American margin. The COP belonged to the Farallón plate, until a subduction zone separated both plates in the Middle Campanian, giving way to a well-developed Mid Campanian–Mid Maastrichtian island arc. Accretion in the Late Maastrichtian triggered a change in the subduction system, and the development of a new arc system of Late Maastrichtian–Late Paleocene age, which crosscut the South America–COP plate boundary. The last accretion occurred in the Late Paleocene.

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Three-dimensional velocity structure of the outer fore arc of the Colombia-Ecuador subduction zone and implications for the 1958 megathrust earthquake rupture zone

Cano

Galvé

Charvis

et al. 2014

J. Geophys. Res. Solid Earth

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In 2005, an onshore, offshore 3-D refraction and wide-angle reflection seismic experiment was conducted along the convergent margin at the border between Colombia and Ecuador, over the rupture zone of the 1958, M w 7.6 subduction earthquake. A well-defined Vp velocity model of the plate boundary and upper and lower plates was constructed, down to 25 km depth, using first arrival traveltimes inversion. The model reveals a several kilometers thick, low-velocity zone in the upper plate, located immediately above the interplate contact. This low-velocity zone might be related to alteration and fracturing of the mafic and ultramafic rocks, which composed the upper plate in this area by fluids released by the lower plate with possible contributions from sediment underplating. Near the toe of the margin, the model shows a low-velocity gradient in the outer wedge, which is interpreted as highly faulted and fractured rocks. This low-velocity/low-gradient region appears to limit the oceanward extension of the rupture zones of the 1958 and 1979 earthquakes, possibly because coseismic deformation and uplift of the outer margin wedge dissipates most of the seismic energy.

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Multiple plume events in the genesis of the peri‐Caribbean Cretaceous oceanic plateau province

Cited by 96 publications

References 56 publications

Stratigraphy of the late Cretaceous–Paleogene deposits of the cordillera occidental of central ecuador: geodynamic implications

Stratigraphy of the late Cretaceous–Paleogene deposits of the cordillera occidental of central ecuador: geodynamic implications

Accreted oceanic terranes in Ecuador: southern edge of the Caribbean Plate?

Three-dimensional velocity structure of the outer fore arc of the Colombia-Ecuador subduction zone and implications for the 1958 megathrust earthquake rupture zone

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