Late Cenozoic to Modern-Day Volcanism in the Northern Andes: A Geochronological, Petrographical, and Geochemical Review

Marín-Cerón, María Isabel; Leal-Mejía, Hildebrando; Bernet, Matthias; Mesa-García, J.

doi:10.1007/978-3-319-76132-9_8

Cited by 18 publications

(33 citation statements)

References 92 publications

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“…, the Amaga basin samples fall as expected within the field defined by the NVZ (see compilation ofMarín-Cerón et al, 2019). It is worth noting that the Amaga Basin samples correspond to the most depleted part of the isotopic range observed along the Andes, suggesting limited crustal contamination during magma ascent and/or limited contribution of subducted sedimentary material to the mantle wedge.…”

supporting

confidence: 77%

“…As was the case for Sr and Nd isotopic data, the Amaga basin samples fall in the field defined by the northern volcanic zone and differ drastically from fields defined by central and southern volcanic zones(Fig. 11A) (see compilations made byMarín-Cerón, 2007 andMarín-Cerón et al, 2010;2019). The rather radiogenic values of Pb isotopes for the northern volcanic zone have been interpreted as being due either to an enriched mantle reservoir or to continental crust assimilation.…”

mentioning

confidence: 77%

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Thermochronological, petrographic and geochemical characteristics of the Combia Formation, Amagá basin, Colombia

Bernet

García

Chauvel

et al. 2020

Journal of South American Earth Sciences

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The Amagá basin between the Western and Central Cordilleras of the Northern Andes of Colombia host the Neogene volcanic and volcaniclastic Combia Formation. At this stage it is not clear how the formation of this unit is related to arc volcanism and which role the Nazca plate subduction beneath the western margin of South America plays. The timing, petrography and geochemical characteristics of Combia Formation rocks were studied in the western and eastern parts of the Amagá basin, in order to gain more information on the type of magma generation and volcanic activity that led to the deposition of the Combia Formation. Apatite and zircon fission-track dating largely confirm a 12-6 Ma age for the deposition of the Combia Formation. Petrographic and major element analyses show that mainly trachy-andesite ignimbrites with a calc-alkaline composition were deposited in the western Amagá basin, whereas the volcanic rocks of the eastern Amagá basin are lava flow and fallout deposits of basaltic andesites or of tholeiitic composition. Trace element and isotopic analyses show that slab dehydration and sediment melting were important in primary magma generation in the mantle wedge, but the primary magma was mixed with lower continental crustal melts, resulting in characteristic isotope signatures in the western and eastern Amagá basin. All this points to subduction driven arc volcanism with slab dehydration, sediment melting magma mixing.

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supporting

confidence: 77%

mentioning

confidence: 77%

Thermochronological, petrographic and geochemical characteristics of the Combia Formation, Amagá basin, Colombia

Bernet

García

Chauvel

et al. 2020

Journal of South American Earth Sciences

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“…As stated by Marín-Cerón et al (2019), Neogene volcanism and hypabyssal porphyritic magmatism within Colombia's Central Cordillera is the product of an intricate evolution of the Nazca plate and its subduction history under the NW margin of continental South America. These authors suggest, that the evolution of the volcanic calc-alkaline arc starts in the mid-Miocene and continues up to nowadays.…”

Section: Geotectonic Settingmentioning

confidence: 98%

“…Based upon the presence of adakite-like characteristics in the Neogene volcanic rocks of this region, Marín-Cerón et al (2019) proposed a model for the production of primary subductionrelated magmas, which includes dehydration/decarbonization and melting of the subducted plate. In this petrogenetic proposal, the lower crust promotes a significant effect upon rock composition during magma rise, and the possible retention of the primary mantle-derived magmas (including slab fluids/melts) within lower crustal magma chambers located along the entire volcanic arc.…”

Section: Geotectonic Settingmentioning

confidence: 99%

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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“…There is an absence of volcanism in the Northern Cordillera of the Andes because of the shallow or blocked subduction of the Nazca Plate (Vargas and Mann, 2013). According to Marin‐Ceron et al (2019), there are 63 volcanoes in Colombia, of which 17 are active stratovolcanoes. Most of these are surrounded by densely populated areas with a long history of disasters, such as the eruption of the Nevado del Ruiz volcano on 13 November 1985, spawning the most catastrophic landslide in Colombia and the second largest volcanic disaster of the twentieth century.…”

Section: Colombia: Geographical and Hydroclimatological Featuresmentioning

confidence: 99%

Spatial and temporal patterns and the socioeconomic impacts of landslides in the tropical and mountainous Colombian Andes

Aristizábal

Sánchez

2020

Disasters

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Landslides are a natural hazard that presents a major threat to human life and infrastructure. Although they are a very common phenomenon in Colombia, there is a lack of analysis that entails national and comprehensive spatial, temporal, and socioeconomic evaluations of such events based on historical records. This study provides a detailed assessment of the spatial and temporal patterns and the socioeconomic impacts associated with landslides that occurred in the country between 1900 and 2018. Two national landslide databases were consulted and this information was complemented by local and regional landslide catalogues. A total of 30,730 landslides were recorded in the 118-year period. Rainfall is the most common trigger of landslides, responsible for 92 per cent of those registered, but most fatalities (68 per cent) are due to landslides caused by volcanic activity and earthquakes. An 'fN curve' revealed a very high frequency of small and moderate fatal landslides in the time frame.

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Late Cenozoic to Modern-Day Volcanism in the Northern Andes: A Geochronological, Petrographical, and Geochemical Review

Cited by 18 publications

References 92 publications

Thermochronological, petrographic and geochemical characteristics of the Combia Formation, Amagá basin, Colombia

Thermochronological, petrographic and geochemical characteristics of the Combia Formation, Amagá basin, Colombia

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

Spatial and temporal patterns and the socioeconomic impacts of landslides in the tropical and mountainous Colombian Andes

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