The role of subducted sediments in the formation of intermediate mantle-derived magmas from the Northern Colombian Andes

Errázuriz-Henao, Carlos; Gómez-Tuena, Arturo; Duque-Trujillo, José; Weber, Marion

doi:10.1016/j.lithos.2019.04.007

Cited by 23 publications

(31 citation statements)

References 113 publications

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“…The temperature range of the north and south segments of the volcanic arc satisfices the description of high-temperature gases produced in-depth and proposed by Aiuppa et al (2017). According to Errázuriz-Henao et al (2019), all this volcanic arc is almost founded by rich-Mg# calc-alkaline intermediate volcanic material related to continental arcs, but with distinct trace element and isotopic features that could be associated with contamination by fluids and melts of diverse kinds of subducted sediments detached from the plate and raised as diapirs at distinct depths. Their approach suggests a reprocessing of refractory carbonates into the magmatic arc and propose that the geochemical variety of the magmatic arc is mostly governed by the subducted materials and their exhumation routes inside the mantle wedge.…”

Section: The Geometry Of Isotherms and Implicationssupporting

confidence: 66%

Estimation of the Thermal Structure Beneath the Volcanic Arc of the Northern Andes by Coda Wave Attenuation Tomography

2019

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In the Northern Andes, the magmatic arc rises from a broad area of active volcanism in the South, at the border between Ecuador and Colombia, to a linear north-directed trend of active and inactive volcanic cones. A ∼240-km-long west-east-striking slab tear (Caldas Tear) located approx. 5.5 • N creates an offset in the volcanic arc. This tear looks like a significant controller of volcanic activity: its quasi-WE structure separates inactive magmatic bodies of late Miocene age or older in the North from Quaternary magmatic activity in the South. Coda wave attenuation tomography applied on seismic waveforms recorded between 1993 and 2018 illuminates the volcanic arc, which appears as a segmented structure derived from the complex process of subduction of the Nazca and Caribbean plates under the South America Continent. The attenuation measurements are transformed into thermal measurement using standard rock physics relationships, supported by thermal estimations and geothermal gradient observations measured in wells. Active and inactive magmatic belts are associated with a range of relatively low temperatures (∼640 to ∼810 • C in the depth range of 25-100 km), which may be a consequence of the fluid content in hydrous minerals. Along the volcanic arc, the isotherms become shallower from South to North and are interrupted by a cold structure; this structure may reflect a lateral change of the mantle viscosity that prevents the continuity of the volcanic arc. Our estimations show an irregular depth-geometry of the isotherms, probably associated with recent slip events that have perturbed the thermal state along the study area. The isotherms also deepen to the West, probably due to the subduction process of the Nazca Plate (∼0-5 • N). In some areas, the isotherms follow a trend similar to that of a thrust fault-related folding geometry, which suggests a recent process of regional perturbation. We hypothesize that the Panama Arc collision at the north and the effect that imprint the Carnegie Ridge against the continent at the South are responsible for these thermal effects. The northern anomaly suggests thickening of the lithospheric system that prevents the development of the volcanic arc at the north of the Caldas Tear.

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Section: The Geometry Of Isotherms and Implicationssupporting

confidence: 66%

Estimation of the Thermal Structure Beneath the Volcanic Arc of the Northern Andes by Coda Wave Attenuation Tomography

2019

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“…However, the rhyolites (ε Nd (t) = −7.9; zircon ε Hf (t) = −10.0 to −0.5) show similar ε Nd (t) and higher zircon ε Hf (t) than those of the andesites (ε Nd (t) = −9.7 to −8.7; zircon ε Hf (t) = −13.3 to −8.2; Figure b and Tables S3 and S4). The high‐Mg intermediate‐felsic rocks could be generated by partial melting of mélange diapirs in the mantle wedge where sediments, altered oceanic crust, and ultramafics have physically mixed (Castro et al, ; Codillo et al, ; Gerya & Yuen, ), for example, in the North Volcanic Province of Colombia (Errázuriz‐Henao et al, ) and in the western Trans‐Mexican Volcanic Belt (Parolari et al, ). A sediment‐dominated mélange (Castro & Gerya, ) is consistent with the evolved isotopic compositions of the volcanic rocks in this study (Figures a and b).…”

Section: Discussionmentioning

confidence: 99%

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

Wang

Zhu

et al. 2020

Tectonics

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Identifying arc-trench systems along with spatial and temporal variations in their record of tectono-magmatic events is crucial for determining the orogenic divers and evolution of orogenic systems. New geochronological and geochemical data of Jurassic igneous rocks, as well as detrital zircon data from contemporaneous sedimentary units, within the eastern Bangong-Nujiang suture in central Tibet indicate the existence of an approximately 1,200-km Middle-Late Jurassic magmatic arc system. This arc system can be divided into two distinct along-strike segments, which are characterized by magmatic activity extending from 166 to 160 Ma in the east and 170-148 Ma in the west, followed by magmatic gaps at 160-120 and 148-125 Ma, respectively. An accretionary prism, magmatic arc, and retro-arc sedimentary units are identified from south to north in the eastern segment. The 166-160 Ma arc includes high-K calc-alkaline granitoids, and high-Mg andesites, dacites, and rhyolites, which collectively can be interpreted to originate from partial melting of ancient lower crust and mélange diapirs above a north dipping subduction zone. Our analysis reveals the existence of an overall compressional arc-trench system along strike, which overlaps with a phase of 170-160 Ma ophiolite generation and a rock association of 160-148 Ma slab-derived adakites and oceanic island basalt-type rocks, and is followed by an overall magmatic gap during 148-125 Ma with subsequent 125-105 Ma extensive magmatism. We infer that these records may reflect sequential tectonic events, including subparallel ridge-trench collision (170-160 Ma), slab window formation (160-148 Ma), subsequent subduction termination (148-125 Ma), and final Lhasa-Qiangtang amalgamation (125-105 Ma).

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“…Unfortunately, to our knowledge, there are no experimental studies describing the behavior of barite during melting of high‐grade metamorphic assemblages, but it is interesting to observe that barite has been reported in the deep mantle xenoliths from the Colombian SVP (Weber, 1998) and in multiphase solid inclusions of partially molten UHP eclogites (Wang et al., 2014). If the Colombian xenoliths are indeed residuals of partially molten mélange diapirs as previously suggested (Errázuriz‐Henao et al., 2019), then is likely that the gradual dissolution and potential breakdown of refractory barite deep in the subduction zone could be modulating the along arc Ba concentrations of NVP volcanoes.…”

Section: Discussionmentioning

confidence: 58%

“…In Nd‐Hf isotopic space, volcanoes at the edges follow the so‐called “terrestrial array” (Vervoort et al., 1999), while the rest of the volcanoes follow a shallower slope that subtly trends to the so‐called “seawater array” (Albarède et al., 1998) (Figure 5d). As a whole, the isotopic compositions are bracketed between a depleted end‐member similar to the Nazca Plate mid‐ocean ridge basalts (MORB) and two enriched end‐members that can be well represented by a mixture between sediments of the Western Equatorial Atlantic, including the Colombian Caribbean, and sediments of the PB (Carpentier et al., 2009; Errázuriz‐Henao et al., 2019; Osborne et al., 2014; and this study) (Figure 5). Basement rocks show more variable Sr‐Nd ratios than the volcanic rocks but display different Pb‐Pb isotopic trends.…”

Section: The Continental Realmmentioning

confidence: 99%

A Biogeochemical Imprint of the Panama Basin in the North Andean Arc

Errázuriz-Henao

Gómez-Tuena

Parolari

et al. 2021

Geochem Geophys Geosyst

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The biological and sedimentological surface-processes recorded in the compositions of seafloor sediments are transferred to the Earth's interior at convergent margins. These materials can be either recycled into the deep mantle forming long-term compositional heterogeneities (Stracke et al., 2005), or be reworked shallowly into arc magmas giving shape to the continental masses (Behn et al., 2011). While it has been long recognized that subducted sediments exert an important control in the compositions of island arcs (Plank, 2005), less is known about the geochemical imprint of the oceanic realm in thick-crusted continental arc sections. This is because subducting sediments (i.e., GLOSS; Plank, 2013) are compositionally very similar to the overriding continental crust with which ascending magmas may interact, and because forearc subduction erosion may introduce a volumetrically higher crustal influx at most continental margins that could overwhelm the oceanic inputs (Straub et al., 2020).

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The role of subducted sediments in the formation of intermediate mantle-derived magmas from the Northern Colombian Andes

Cited by 23 publications

References 113 publications

Estimation of the Thermal Structure Beneath the Volcanic Arc of the Northern Andes by Coda Wave Attenuation Tomography

Estimation of the Thermal Structure Beneath the Volcanic Arc of the Northern Andes by Coda Wave Attenuation Tomography

Reconciling Orogenic Drivers for the Evolution of the Bangong‐Nujiang Tethys During Middle‐Late Jurassic

A Biogeochemical Imprint of the Panama Basin in the North Andean Arc

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