Multi-proxy isotopic tracing of magmatic sources and crustal recycling in the Palaeozoic to Early Jurassic active margin of North-Western Gondwana

Lelij, Roelant van der; Spikings, Richard; Gerdes, Axel; Chiaradia, Massimo; Vennemann, Torsten; Mora, Andrés

doi:10.1016/j.gr.2018.09.007

Cited by 13 publications

(6 citation statements)

References 70 publications

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“…In fact, in the Th/La vs. Ba/La plot (Figure 13D), the samples define a gently sloped positive trend that is suggestive of higher crustal contamination in the most siliceous rocks, as it is also suggested by their peraluminous character (Figure 8D). This agrees with Maze (1984) and van der Lelij et al (2019), who obtained values of 87Sr/86Sri (0.706-0.711) and εHfi (-5.76) in volcanic rocks from the La Quinta Formation in the eastern flank of the Serranía del Perijá and the Mérida Andes, indicative of conspicuous crustal assimilation. In addition, the low variation in Ba/La ratios points toward inconstant influence of slab-derived fluids; although Pb positive tendencies found in most rocks (Figure 10-12) mark the incorporation of crustal derived sediments via subduction recycling (Wilson, 1989;Class et al, 2000;Sen, 2014;Winter, 2014).…”

Section: Petrogenesis Of the Igneous Rocks From The La Quinta Formationsupporting

confidence: 91%

“…In the discrimination diagram of Hollocher et al (2012) for basalts, all the samples (differentiated rocks included for comparison) plot in the "Alkaline arcs" field (Figure 16A), in agreement with trace element classification schemes (Figure 8B-C). Likewise, the mafic rocks plot above the MORB-OIB array (high Th and Nb) (Figure 16B), which is normally found in arcrelated rocks subjected to interaction with the continental crust during ascent (Pearce, 2008), consistent with isotopic ratios (Maze, 1984;van der Lelij et al, 2019). Combined, both diagrams define two features commonly found in early stages of continental rifting: alkaline tendencies and contamination by a thick continental crust (Winter, 2014).…”

Section: Tectonic Model and Regional Implicationsmentioning

confidence: 60%

“…Low Th/Hf and Ta/Hf ratios (Figure 13C) in the mafic and intermediate rocks suggest a hybrid signature between arc and intraplate, as well as limited contribution from calc-alkaline or enriched mantle sources. However, rhyolites and the ignimbrite display a greater influence of a calc-alkaline reservoir, probably acquired during assimilation of older arcs (e.g., Paleozoic granitoids) (Maze, 1984;van der Lelij et al, 2016a;van der Lelij et al, 2019) . On the other hand, andesites and rhyolites studied by Jiménez (2010) have an intraplate affinity and perhaps had a more enriched source or higher degrees of middle-toupper crustal contamination.…”

Section: Petrogenesis Of the Igneous Rocks From The La Quinta Formationmentioning

confidence: 99%

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Petrogenetic constraints of the La Quinta Formation igneous rocks, Serranía del Perijá, northern Colombian Andes

2022

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La Quinta Formation is a Triassic-Jurassic volcano-sedimentary unit that crops out along both flanks of the Serranía de Perijá, in Cesar and La Guajira departments of Colombia, and Zulia state in Venezuela. It is mainly composed of red clastic sedimentary rocks (siltstones, sandstones, and minor conglomerates), interbedded with volcanic rocks and cut by small stocks. The volcanic horizons are mainly formed by rhyolitic tuffs and lava flows (basalts and andesites). Andesites and basalts are constituted by plagioclase, clinopyroxene, biotite, magnetite, apatite, and zircon, whereas rhyolites and tuffs are formed by plagioclase, ß quartz, biotite, and sanidine. EMPA analyses revealed that plagioclase display varying compositions from labradorite-andesine in intermediate and basic rocks to oligoclase in rhyolites. Besides, clinopyroxene from basalts was classified as augite, and several hydrothermal mineral phases were also recognized, such as epidote, Ca-zeolites, and andradite-grossular. Using ILMAT (ilmenite-magnetite) geothermometer, temperature and oxygen fugacity conditions of 700-730°C and +1.2 ∆NNO were determined for dolerite. Whole-rock geochemistry results evidence that La Quinta Formation volcanic rocks belong to the sub-alkaline (calc-alkaline) series, displaying compositions from basaltic andesites to rhyolites. Chondrite normalized REE and incompatible elements spidergrams show typical features of subduction-related magmatism and depict three groups of rocks (basic, intermediate, and acid) with contrasting geochemical behaviors. Hence, each group could have formed during single magmatic events associated with different magmatic suites. Nevertheless, the three groups have features that suggest a genesis related to an Andean-type supra-subduction zone, which agrees with the regional tectonic assemblage during Triassic-Jurassic times.

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Section: Petrogenesis Of the Igneous Rocks From The La Quinta Formationsupporting

confidence: 91%

Section: Tectonic Model and Regional Implicationsmentioning

confidence: 60%

Section: Petrogenesis Of the Igneous Rocks From The La Quinta Formationmentioning

confidence: 99%

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Petrogenetic constraints of the La Quinta Formation igneous rocks, Serranía del Perijá, northern Colombian Andes

2022

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“…These granitoids were generated by the fusion of rocks of the Paleozoic metamorphic basement of the Famatinian Orogen (Leal et al, 2019;López and Zuluaga, 2020;Rodríguez et al, 2017;Van der Lelij et al, 2016;Zuluaga and López., 2019), as suggested by the abundance of inherited zircons from the basement in these plutons (Rodríguez et al, 2020a) and the isotopic data (Leal et al, 2019;Van der Lelij et al, 2019).…”

Section: Triassic To Early Jurassic (Ca 234 To Ca 197)mentioning

confidence: 83%

Evolution of arc magmatic cycles from the Carboniferous to the Early Cretaceous in the western paleomargin of Gondwana, north of the Andes

et al. 2022

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This work presents a considerable volume of new and compiled data indicating that arc magmatism in the western paleomargin of Gondwana began in the Carboniferous and continued during the Permian and Early Triassic. Subsequently, the magmatism reactivated during the Early and Middle Jurassic due to the subduction of the Farallon Plate under the continental paleomargin. The arc pluton belts are distributed from the edge of the paleomargin toward the interior of the continent in the same orientation as the slab (west–east direction). During the Carboniferous, between ca. 333 Ma and ca. 300 Ma, magmatism formed small calcic metaluminous gabbro and leucotonalite plutons of tholeiitic to calc-alkaline affinity on the western margin of Gondwana. Later, the second belt of arc plutons formed during the Permian/Triassic (between ca. 300 Ma and ca. 234 Ma) and are represented by metaluminous to peraluminous calc-alkaline to high-K calc-alkaline batholiths and stocks of heterogeneous composition (granites, granodiorites, diorites, quartz monzonites, and monzonites), which were intruded by dikes and minor granite bodies during the Middle Triassic. Between ca. 214 Ma and ca. 186 Ma, peraluminous plutons of batholithic dimensions of monzogranitic to syenogranitic composition developed in the back-arc. Between ca. 197 Ma and ca. 186 Ma, back-arc magmatism occurred, while a new magmatic cycle began along the arc axis. At the end of the Jurassic, the magmatic arc cycle ended in the northwestern paleomargin of Gondwana (ca. 164 Ma). The intrusion ca. 159 Ma of porphyritic bodies of alkaline andesitic basalts toward the edge of the continental margin suggests the strangulation and collapse of the subduction zone in the mantle. To the west, off the continental margin, a new arc magmatic cycle began over a different continental terrane ca. 171 Ma and extended to ca. 138 Ma, giving rise to a belt of calcic to calcic-alkaline plutons emplaced in the Ordovician metamorphic (Anacona Terrane), Triassic (Tahamí Terrane), and Upper Jurassic (Tierradentro Orogen) rocks. The assemblage amalgamated to the western margin of Gondwana in this period.

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“…The oldest arc units (plutons with dates spanning between 499-414 Ma) exposed in the Mérida Andes and the Santander Massif yield whole rock εNdi values (Figure 6A) ranging between −8.71 and 3.06 [71], while present day whole rock Pb isotopic compositions (Figure 6B) vary between 6D). εHft (zircon) values (average values from a single rock with indistinguishable values from single ablation spots) from Cambrian-Earliest Devonian magmatic or metamorphic rims range between −10.40 ± 0.53 and 5.26 ± 0.44 [3,71], which correspond to Lu-Hf model ages of ~1.7 to ~0.80 Ga (Figure 6C). There are no clear differences in the isotopic compositions of Palaeozoic arc intrusions in the Mérida Andes and the Santander Massif.…”

Section: Radiogenic and Stable Isotopic Compositions: Arcsmentioning

confidence: 99%

The Geochemical and Isotopic Record of Wilson Cycles in Northwestern South America: From the Iapetus to the Caribbean

Spikings

Lelij

2021

Geosciences

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Isotopic and geochemical data delineate passive margin, rift and active margin cycles in northwestern South America since ~623 Ma, spanning from the Iapetus Wilson Cycle. Ultramafic and mafic rocks record rifting associated with the formation of the Iapetus Ocean during 623–531 Ma, while the initiation of subduction of the Iapetus and Rheic oceans is recorded by continental arc plutons that formed during 499–414 Ma, with alternating compressive and extensional stages. Muscovite 40Ar/39Ar dates suggest there may have been a phase of Carboniferous metamorphism, although this remains tentative. A Passive margin was modified by active margin magmatism that started at ~294 Ma and culminated with collisional tectonics that signaled the final stages of the amalgamation of western Pangaea. Early Pangaea fragmentation included back-arc rifting during 245–216 Ma, leading to a Pacific active margin that spanned from 213–115 Ma. Trench retreat accelerated during 144–115 Ma, forming a highly attenuated continental margin prior to the collision of the Caribbean Large Igneous Province at ~75 Ma.

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Multi-proxy isotopic tracing of magmatic sources and crustal recycling in the Palaeozoic to Early Jurassic active margin of North-Western Gondwana

Cited by 13 publications

References 70 publications

Petrogenetic constraints of the La Quinta Formation igneous rocks, Serranía del Perijá, northern Colombian Andes

Petrogenetic constraints of the La Quinta Formation igneous rocks, Serranía del Perijá, northern Colombian Andes

Evolution of arc magmatic cycles from the Carboniferous to the Early Cretaceous in the western paleomargin of Gondwana, north of the Andes

The Geochemical and Isotopic Record of Wilson Cycles in Northwestern South America: From the Iapetus to the Caribbean

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