Triassic metamorphism in the northern part of the Tahamí Terrane of the central cordillera of Colombia

Restrepo, Jorge Julián; Ordóñez-Carmona, Oswaldo; Armstrong, Richard; Pimentel, Márcio Martins

doi:10.1016/j.jsames.2011.04.009

Cited by 55 publications

(62 citation statements)

References 21 publications

(23 reference statements)

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“…The Central Cordillera has an extensive Mesozoic-Cenozoic magmatic record characterized by a series of plutonic bodies considered to be Late Jurassic to Late Cretaceous in age (Aspden et al, 1987;Villagómez et al, 2011). These rocks intrude the Permian-Triassic and older metamorphic basement (Vinasco et al, 2006;Restrepo et al, 2011;Villagómez et al, 2011;Martens et al, 2014). The Mesozoic magmatic record is related to a volcanic arc formed by the subduction of the Farallon plate beneath the NW margin of South America (Aspden et al, 1987;Villagómez et al, 2011;Cochrane et al, 2014a).…”

Section: Geological Settingmentioning

confidence: 99%

“…During the Permian-Triassic, the Central Cordillera and the Cordillera Real of Colombia and Ecuador experienced the last phases of the agglomeration of Pangea and the beginning of its breakup, which is reflected in bimodal S-type and gabbroic syntectonic magmatism (Vinasco et al, 2006;Restrepo et al, 2011;Cochrane et al, 2014b;Martens et al, 2014). 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%

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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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Section: Geological Settingmentioning

confidence: 99%

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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“…14; Table 1). Permian to Middle Triassic igneous and metamorphic rocks are widespread in the Central Cordillera of Colombia and the Sierra Nevada de Santa Marta (e.g Vinasco et al, 2006;Montes et al, 2010;Restrepo et al, 2011;Villagómez et al, 2011;Spikings et al, 2014)…”

mentioning

confidence: 99%

Palaeozoic to Early Jurassic history of the northwestern corner of Gondwana, and implications for the evolution of the Iapetus, Rheic and Pacific Oceans

et al. 2016

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The Palaeozoic to Mesozoic igneous and metamorphic basement rocks exposed in the Mérida Andes of Venezuela and the Santander Massif of Colombia are generally considered to define allochthonous terranes that accreted to the margin of Gondwana during the Ordovician and the Carboniferous. However, terrane sutures have not been identified and there are no published isotopic data that support the existence of separate crustal domains. A general paucity of geochronological data led to published tectonic reconstructions for the evolution of the north- western corner of Gondwana that do not account for the magmatic and metamorphic histories of the basement rocks of the Mérida Andes and the Santander Massif. We present new zircon U–Pb (ICP-MS) data from 52 igneous and metamorphic rocks, which we combine with whole rock geochemical and Pb isotopic data to constrain the tectonic history of the Precambrian to Mesozoic basement of the Mérida Andes and the Santander Massif. These data show that the basement rocks of these massifs are autochthonous to Gondwana and share a similar tectono- magmatic history with the Gondwanan margin of Peru, Chile and Argentina, which evolved during the subduc- tion of oceanic lithosphere of the Iapetus Ocean. The oldest Palaeozoic arc magmatism is recorded at ~500 Ma, and was followed shortly by Barrovian metamorphism. Peak metamorphic conditions at upper amphibolite facies are recorded by anatexis at ~477 Ma and the intrusion of synkinematic granitoids until ~472 Ma. Subsequent retrogression resulted from localised back-arc or intra-arc extension at ~453 Ma, when volcanic tuffs and interfingered sedimentary rocks were deposited over the amphibolite facies basement. Continental arc magmatism dwindled after ~430 Ma and terminated at ~415 Ma, coevally with most of the western margin of Gondwana. After Pangaea amalgamation in the Late Carboniferous to Early Permian, a magmatic arc developed on its western margin at ~ 294 Ma as a result of subduction of oceanic crust of the palaeo-Pacific ocean. Intermittent arc magmatism recorded between ~ 294 and ~ 225 Ma was followed by the onset of the Andean subduction cycle at ~ 213 Ma, in an extensional regime. Extension was accompanied by slab roll-back which led to the migration of the arc axis into the Central Cordillera of Colombia in the Early Jurassic

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“…Considering also interaction with Central America blocks during the Triassic, some authors propose terrane accretion or strong plate coupling implying large migration from the south of the Arquia and Tahami Terranes (e.g., Cardona et al, ; Kennan & Pindell, ). Also, recent geochronological studies have hypothesized a Triassic Andean‐type orogeny on the western side of Pangea, as part of an orogenic belt that affected rocks presently in the NW SA (Restrepo et al, ). Similarly, paleogeographic models for Pangea, considering a strong paleomagnetic data input, suggest a subduction zone along a relatively continuous and regular western margin of Pangea during middle‐late Triassic (Golonka & Ford, ; Scotese, ).…”

Section: Introductionmentioning

confidence: 99%

“…The Arquia Terrane and the Quebradagrande Terrane make up the Romeral Suture, which lies sandwiched between the continental Tahami Terrane and the accreted oceanic Caribe Terrane (Figure ; Gómez et al, ). Over the past decade, geochronological and geochemical works focusing on the genesis and tectonic affinity of the terranes affected by Triassic magmatism have been performed (e.g., González, ; Martens et al, ; Nivia et al, ; Restrepo et al, ; Spikings et al, ; Vinasco et al, ; Villagómez et al, ); however, conclusions of these studies contain contradicting interpretations about the tectonic framework during the Triassic in NW SA.…”

Section: Introductionmentioning

confidence: 99%

Emplacement of the Triassic Pueblito Pluton, NW Colombia: Implications for the Evolution of the Western Margin of Pangea

2018

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We present the first structural geology focused study of a Triassic pluton in the Northern Andes, which provides new insights into the understanding of the tectonically complex northwestern corner of South America. Based on a combination of field structural data (377 stations) and a detailed magnetic susceptibility survey, 159 sites, we studied the structure of the Pueblito Pluton (PP), an original suprasubduction mafic cumulate structure emplaced in the northern part of the Arquia Terrane (western margin of Central Cordillera of Colombia). Even though the PP has resided along an active margin for over 230 million years ago, geochronology suggests no postcrystallization Ar‐loss and, probably, no major reset of the original emplacement fabric. The PP magnetic fabric is dominatly parallel to the measured field foliation and formed under submagmatic to high‐temperature conditions, at the final stages of cooling. The pluton internal contacts, mylonitic structures along the western margin, shape of the pluton, scalar parameters of the magnetic fabric, the directional field/magnetic data, and the geochronological data are compatible with a sinistral transpressional tectonic regime of emplacement by ca 233 Ma. This regime was regionally extended in the Arquia and Tahami Terranes (western margin of Pangea).

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Triassic metamorphism in the northern part of the Tahamí Terrane of the central cordillera of Colombia

Cited by 55 publications

References 21 publications

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

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

Palaeozoic to Early Jurassic history of the northwestern corner of Gondwana, and implications for the evolution of the Iapetus, Rheic and Pacific Oceans

Emplacement of the Triassic Pueblito Pluton, NW Colombia: Implications for the Evolution of the Western Margin of Pangea

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