Universidad de ConcepciónSociedad Chilena de Ciencias del Mar


E2.3-VOLC Volcanology

The Andean volcanic arc is an outstanding natural laboratory for studying the dynamics and structure of active volcanoes at different spatio-temporal scales and from multiple methodological perspectives. Into this context, we encourage session proposals considering topics such as: assessment of modern volcanic processes and products; instrumental monitoring of volcanic systems and characterization of their activity; conceptual and numerical models on the internal dynamics of active systems, among others. Session proposals on multidisciplinary studies of recent eruptive or critical events of Andean volcanoes are also welcome.

Plenary Speaker: Dr. Jan Marie Lindsay, The University of Auckland, New Zealand. View Profile

VOLC-GS: General Session Volcanology

Convenors: Luis Lara, José L. Palma.

Description: This session will receive abstracts related to Volcanology that cannot be included in one of the specific sessions of this thematic area

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VOLC-1: Volcanism of the Central Andean Volcanic Zone (CAVZ)

Convenors: Felipe Aguilera, Philippe Robidoux.

Description: The Central Andean Volcanic Zone (CAVZ) is an extensive active volcanic chain that covers southern Peru, western Bolivia, northwestern Argentina and northern Chile. In the CAVZ exists a wide range of eruptive products, various types of volcanic edifices and a complex historical evolution. Additionally, several eruptions have been recorded in the last 30 years, especially in southern Peru volcanoes in the past 10 years. The objective of this scientific session is receive works related to the all topics associated to the study of the CAVZ volcanism, including physical volcanology, petrology, fluid geochemistry, geodesy, volcanic hazards and risks, volcanic monitoring, among others, considering volcanoes from all countries (Argentina, Bolivia, Chile and Peru).

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VOLC-2: Quaternary Volcanism and Tectonics of the Southern Andes

Convenors: José Cembrano, Luis Lara

Description:  Almost 10 years ago, the conveners of this session published an article (Cembrano and Lara, 2009. Tectonophysics) aimed to, building on previous pioneer contributions, to summarize what we understand about the relationship between Quaternary tectonics and volcanism in Southern Andes. More recently, a number of studies have addressed this topic moving the frontier much beyond our modest interpretations with new ideas and research questions. In this session we welcome contributions that address the causal connections between tectonics and active volcanism, with emphasis on the processes and from a wide range of perspectives and geodynamic settings, from those based on instrumental data to geological, petrological or structural studies, including numerical modeling.

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VOLC-3: Submarine volcanism and geology of oceanic islands

Convenors: Luis Lara, Javier Reyes, Juan Díaz Naveas, Cristian Rodrigo.

Description: Globally, less than 10% of the seafloor has been mapped and less than 5% of the already known seamounts have high resolution bathymetry. Thus, there is scarce or imprecise information about the seamounts and oceanic islands, which make difficult to understand primary processes and even to promote the environmental protection of these unique habitats. But this situation is changing because of new research efforts and the availability of a modern oceanographic vessel in Chile. In this session we welcome contributions on geological (petrology, geochronology, etc.) and geophysical (bathymetry, etc.) studies recently performed at seamounts and islands of the Nazca Plate, or nearby the Antarctic Plate, especially those aimed to understand the processes involved in the genesis of this style of volcanism.

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VOLC-4: Monogenetic volcanism: Origins and related processes

Convenors: Lucy E. McGee, Luis Lara

Description: Volcanism at convergent margins is represented essentially by stratovolcanoes, while monogenetic volcanism in these settings appears subordinate. The style of monogenetic volcanism in intraplate regions is quite distinct to convergent margins, in addition to the dominant processes of petrogenesis of the magmas. In the last few years there has been a notable increase in the production of information regarding monogenetic volcanism in South America, despite it being a less frequent eruption style. Various studies have noted the spatial and temporal co-existence of such volcanoes with stratovolcanoes, although the latter are associated with different geological processes (from their genesis in the mantle to the mechanism of their ascent through the crust). We seek contributions for this session which document monogenetic volcanism in different environments and from different perspectives. We encourage studies related to petrology, reconstructions of physical volcanology, studies based on instrumental data and/or numerical modelling of magma ascent and its conditions.

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VOLC-5: Characterization, assessment and communication of volcanic hazard and risk

Convenors: Álvaro Amigo, José L. Palma.

Description: Volcanic eruptions can trigger a wide variety of natural phenomena that significantly affect human population and infrastructure: lahars, pyroclastic density currents, lava flows, tephra falls and detritus avalanches, among others. This session aims to assess the volcanic hazard through different methodological approaches focused on volcanic deposit characterization, field observations, numerical modeling of volcanic material dispersion, as well as probabilistic evaluation of hazards.

Las erupciones volcánicas son capaces de generar una variedad importante de fenómenos que afectan la población e infraestructura que los rodea: lahares, corrientes de densidad piroclásticas, flujos de lava, caída de tefra, avalanchas de detritos, entre otros. Esta sesión abordará análisis de peligrosidad volcánica a través de diferentes metodologías, enfocados a la caracterización de depósitos volcánicos, observaciones de campo, modelado numérico de inundación o dispersión de material volcánico, así como evaluaciones probabilísticas.

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VOLC-6: Dynamic of volcanic activity: observations, monitoring and modeling

Convenors: Luis E. Franco, Cindy Mora-Stock, José L. Palma.

Description: Volcanic monitoring, modeling and observations collected during eruptions allow us to infer characteristics of the volcanic processes generated by the different activity styles. This knowledge is fundamental to improve and complement our monitoring capacity and determine the most probable development of volcanic activity allowing to improve forecast times. This session will focus on studies that describe and characterize the evolution of volcanic eruptions, investigations that identify the distribution and characteristics of reservoirs and magmatic conduits, as well as the description of premonitory aspects. We invite contributions that include instrumental observations of seismicity, emissions of volcanic gases, infrasound, and deformation -among others-; studies that show changes in degassing and petrological analyzes that indicate or suggest a dynamics in magmas; and studies that describe advances in the monitoring of specific volcanic phenomena.

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