Magmatic evolution of the Andean Eastern Cordillera of Colombia during the Cretaceous: Influence of previous tectonic processes

Vásquez, Mónica; Altenberger, Uwe; Romer, Rolf L.; Sudo, Masafumi; Moreno-Murillo, Juan Manuel

doi:10.1016/j.jsames.2009.02.003

Cited by 37 publications

(32 citation statements)

References 28 publications

(58 reference statements)

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“…This interpretation is supported by the age around 110 Ma (Early Albian) obtained from metagabbros from the Birón Complex (Table and the supporting information). Such an Early Cretaceous extensional tectonics is also recorded in Colombia, by the opening of a marginal basin (Quebradagrande Fm) biostratigraphically dated as Valanginian to Albian [ Nivia et al ., ] and by a high subsidence and intraplate intrusions in the eastern Cordillera (136–97 Ma) [ Fabre , ; Vásquez et al ., ]. In this view, the D 3 event would comprise the rapid exhumation of the Raspas ophiolitic Complex to crustal root level at approximately 130–120 Ma [ Gabriele , ; John et al ., ] and the tilting of the El Oro Complex at approximately 110 Ma (Figure d).…”

Section: Discussionmentioning

confidence: 99%

Fore arc tectonothermal evolution of the El Oro metamorphic province (Ecuador) during the Mesozoic

et al. 2014

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The El Oro metamorphic province of SW Ecuador is a composite massif made of juxtaposed terranes of both continental and oceanic affinity that has been located in a fore-arc position since Late Paleozoic times. Various geochemical, geochronological, and metamorphic studies have been undertaken on the El Oro metamorphic province, providing an understanding of the origin and age of the distinct units. However, the internal structures and geodynamic evolution of this area remain poorly understood. Our structural analysis and thermal modeling in the El Oro metamorphic province show that this fore-arc zone underwent four main geological events. (1) During Triassic times (230-225 Ma), the emplacement of the Piedras gabbroic unit at crustal-root level (~9 kbar) triggered partial melting of the metasedimentary sequence under an E-W extensional regime at pressure-temperature conditions ranging from 4.5 to 8.5 kbar and from 650 to 900°C for the migmatitic unit. (2) At 226 Ma, the tectonic underplating of the Arenillas-Panupalí oceanic unit (9 kbar and 300°C) thermally sealed the fore-arc region. (3) Around the Jurassic-Cretaceous boundary, the shift from trench-normal to trench-parallel subduction triggered the exhumation and underplating of the high-pressure, oceanic Raspas Ophiolitic Complex (18 kbar and 600°C) beneath the El Oro Group (130-120 Ma). This was followed by the opening of a NE-SW pull-apart basin, which tilted the massif along an E-W subhorizontal axis (110 Ma). (4) In Late Cretaceous times, an N-S compressional event generated heterogeneous deformation due to the presence of the Cretaceous Celica volcanic arc, which acted as a buttress and predominantly affected the central and eastern part of the massif.

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Section: Discussionmentioning

confidence: 99%

Fore arc tectonothermal evolution of the El Oro metamorphic province (Ecuador) during the Mesozoic

et al. 2014

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“…High-K magmatism has been documented in the distal continentward side of volcanic arcs (Guillot et al, 2011;Kay & Mpodozis, 2002), and its origin has been related to either crustal or subcontinental mantle melting or to deeper mantle melting. The Mesozoic tectonomagmatic history recorded in the EC rocks may include an older Jurassic arc or rift-related record (Mantilla-Figueroa et al, 2013;Van der Lelij et al, 2016), followed by a major Cretaceous extensional phase that must have reduced the thickness of the former subduction related metasomatized mantle (Vásquez et al, 2010;Vásquez & Altenberger, 2005), therefore limiting the influence of an inherited subductionrelated signature on the Mio-Pliocene magmatism in the EC.…”

Section: 1029/2019jb017835mentioning

confidence: 99%

Deep Crustal Faults, Shear Zones, and Magmatism in the Eastern Cordillera of Colombia: Growth of a Plateau From Teleseismic Receiver Function and Geochemical Mio‐Pliocene Volcanism Constraints

et al. 2019

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The Eastern Cordillera of Colombia, in the northern Andes, is an example of an orogen in which Mesozoic basins were compressed during the Cenozoic, forming a ~2,500‐m‐high plateau in its northern portion. Significant shortening and crustal thickening have contributed to the construction of the present topography and elevation. In this contribution, we combine the use of teleseismic receiver functions, Hf isotopes, whole‐rock geochemistry, and U‐Pb dating to help elucidate the main mechanisms that played a role in the crustal thickening and uplift of the cordillera. Receiver functions calculated for three stations on top of the plateau are consistent with the presence of thrusts that converge into major crustal interfaces at upper‐middle crustal depths; they also suggest the existence of two crustal anisotropic layers beneath the western flank of the cordillera, which we interpret to have formed as a result of shearing. In the northern portion of the plateau, in the area where two Mio‐Pliocene volcanic domes and their related deposits outcrop, a lower crustal high seismic velocity layer is suggested by the receiver functions; we propose magmatic underplating for the origin of this layer. The geochemical characteristics of the volcanic rocks in the area are consistent with partial melt in a mantle influenced by slab‐related fluids; this magma could have been added to the crust and portions of it ascended and reached the surface, experiencing assimilation and differentiation during the process. We hypothesize that this Mio‐Pliocene volcanism was related to flattening of the Nazca subducting slab.

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“…The Eastern Cordillera also includes a more limited Late Triassic to Early Jurassic siliciclastic series covered by an extensive Early Cretaceous transgressive sequence, with welldefined extensional structures (Sarmiento-Rojas et al, 2006) and limited small gabbroic plutons of Early to Late Cretaceous in age (Vásquez and Altenberger, 2005;Vásquez et al, 2010).…”

Section: Geological Settingmentioning

confidence: 99%

“…Following this event, there was an apparent magmatic and tectonic quiescence, reflected in the formation of significant carbonate platforms until the Late Triassic to Early Jurassic (Cediel et al, 2003;Ramos, 2009), until subduction resumed in the Early Jurassic (Ramos, 2009;Vásquez et al, 2010).…”

Section: Jurassic Tectonomagmatic Evolution Of the Northern Andesmentioning

confidence: 99%

Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

Bustamante

Archanjo

Cardona

et al. 2016

Geological Society of America Bulletin

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Integrated geochemical, isotopic, and geochronological constraints from Jurassic plutonic rocks of the Central Cordillera in Colombia were used to determine the tectonic setting and long-term tectonomagmatic evolution of the Northern Andes. We examined three plutonic units with compositions that vary from diorite to granite and with U-Pb zircon crystallization ages from 165 Ma to 129 Ma. These units are interpreted as subduction-related magmas, as indicated by their K 2 O, Na 2 O contents, light to heavy rare earth element (LREE/HREE) ratios, and Pb isotope signatures. The Nd and Hf isotope compositions of these magmatic events become more juvenile (radiogenic) with time. This compositional record suggests an arc maturity trend in which partial melting of basaltic and peridotitic sources becomes more significant than radio genic subducted sediments or the ancient continental crust. Global-scale tectonic reconstructions suggest that Late Jurassic to Early Cretaceous subduction of the Farallon oceanic plate under the Andean continental margin became highly oblique. The consequence was a reduction of the fusible sedimentary budget commonly incorporated during subduction into the mantle, leaving a more refractory mantle with a more primitive compositional signature, and a major decrease in magmatic activity in the Early Cretaceous. In addition, the magmatic evolution recorded in the North Andean Jurassic arc shows that long-term source evolution and regionalscale plate-tectonic processes also play an important role in the compositional evolution and volumes of magmatic products in convergent settings.

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Magmatic evolution of the Andean Eastern Cordillera of Colombia during the Cretaceous: Influence of previous tectonic processes

Cited by 37 publications

References 28 publications

Fore arc tectonothermal evolution of the El Oro metamorphic province (Ecuador) during the Mesozoic

Fore arc tectonothermal evolution of the El Oro metamorphic province (Ecuador) during the Mesozoic

Deep Crustal Faults, Shear Zones, and Magmatism in the Eastern Cordillera of Colombia: Growth of a Plateau From Teleseismic Receiver Function and Geochemical Mio‐Pliocene Volcanism Constraints

Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

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