Targeting deeply-sourced seeps along the Central Volcanic Zone

At convergent margins, plates collide producing a subduction process. When an oceanic plate collides with a continental plate, the denser (i.e., oceanic) plate subducts beneath the less dense (continental) plate. This process results in the transportation of carbon and other volatiles into Earth's deep interior and is counterbalanced by volcanic outgassing. Sampling deeply-sourced seeps and fumaroles throughout a convergent margin allows us to assess the processes that control the inventory of volatiles and their interaction with the deep subsurface microbial communities. The Andean Convergent Margin is volcanically active in four distinct zones: the Northern Volcanic Zone, the Central Volcanic Zone, the Southern Volcanic Zone and the Austral Volcanic Zone, which are each characterised by significantly different subduction parameters like crustal thickness, age of subduction and subduction angle. These differences can change subduction dynamics along the convergent margin, possibly influencing the recycling efficiency of carbon and volatiles and its interaction with the subsurface microbial communities. We carried out a scientific expedition, sampling along a ~800 km convergent margin segment of the Andean Convergent Margin in the Central Volcanic Zone of northern Chile, between 17 °S and 24 °S, sampling fluids, gases and sediments, in an effort to understand interactions between microbiology, deeply-sourced fluids, the crust, and tectonic parameters. We collected samples from 38 different sites, representing a wide diversity of seep types in different geologic contexts. Here we report the field protocols and the descriptions of the sites and samples collected.

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Publication Details

Journal
Open Research Europe
Published
2024-10-18
DOI
https://doi.org/10.12688/openreseurope.17806.1
Primary Topic
Hydrocarbon exploration and reservoir analysis
Type
article
Field-Weighted Citation Impact
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article

Targeting deeply-sourced seeps along the Central Volcanic Zone

Alfredo Esquivel, Deborah Bastoni, Gerdhard L Jessen, Agostina Chiodi et al.
Open Research Europe
Hydrocarbon exploration and reservoir analysis
article

Targeting deeply-sourced seeps along the Central Volcanic Zone

Alfredo Esquivel, Deborah Bastoni, Gerdhard L Jessen, Agostina Chiodi, Susana Layana, Felipe Aguilera, Marco Giardina, Timothy J. Rogers, Angelina Cordone, Peter H. Barry, Cristóbal González Díaz, Joaquín Jesús Blanca Gutiérrez, J. Maarten de Moor, Jenny M. Blamey, Joy Buongiorno, Mauricio Aguilera, Matthew O. Schrenk, Jorge Sánchez-SanMartín, Alejandro Rodríguez, Claudia Milena Navarrete Rojas, Nahun Irarrázabal, C. J. Ramírez, Viola Krukenberg, Jacopo Pasotti, Hector Vallejos
article en

Abstract

At convergent margins, plates collide producing a subduction process. When an oceanic plate collides with a continental plate, the denser (i.e., oceanic) plate subducts beneath the less dense (continental) plate. This process results in the transportation of carbon and other volatiles into Earth's deep interior and is counterbalanced by volcanic outgassing. Sampling deeply-sourced seeps and fumaroles throughout a convergent margin allows us to assess the processes that control the inventory of volatiles and their interaction with the deep subsurface microbial communities. The Andean Convergent Margin is volcanically active in four distinct zones: the Northern Volcanic Zone, the Central Volcanic Zone, the Southern Volcanic Zone and the Austral Volcanic Zone, which are each characterised by significantly different subduction parameters like crustal thickness, age of subduction and subduction angle. These differences can change subduction dynamics along the convergent margin, possibly influencing the recycling efficiency of carbon and volatiles and its interaction with the subsurface microbial communities. We carried out a scientific expedition, sampling along a ~800 km convergent margin segment of the Andean Convergent Margin in the Central Volcanic Zone of northern Chile, between 17 °S and 24 °S, sampling fluids, gases and sediments, in an effort to understand interactions between microbiology, deeply-sourced fluids, the crust, and tectonic parameters. We collected samples from 38 different sites, representing a wide diversity of seep types in different geologic contexts. Here we report the field protocols and the descriptions of the sites and samples collected.

Open Research EuropeVol. 4
National University of Salta (AR), Rutgers, The State University of New Jersey (US), Universidad de Santiago de Chile (CL), Tokyo Institute of Technology (JP), University of Southern California (US), Universidad de Antofagasta (CL), Planetary Science Institute (US), Maryville College (US), Austral University of Chile (CL), University of New Mexico (US), University of Concepción (CL), Universidad Nacional (CR), Fundación Chile (CL), Montana State University (US), Universidad Católica del Norte (CL), Life Science Institute (JP), National Research Council (RO), Millennium Institute for Integrative Biology (CL), Woods Hole Oceanographic Institution (US), University of Naples Federico II (IT), University of Tennessee at Knoxville (US), Michigan State University (US)
Horizon 2020 Framework Programme
Life below water
Openalex Percentile: Top 81%
Hydrocarbon exploration and reservoir analysis
DOIOpen Access PDFOpenAlex
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