Subduction zones are critically involved in recycling of volatiles and elements between the surface and planetary interior and play a key role in climate stability and planetary habitability. Both in the forearc and backarc regions the lithosphere is affected by the deformation induced by the plate movements, generally favouring lithosphere fractures formations and the widespread origination of deeply-sourced springs, hot or cold, that carry deep fluids and gases up to the surface. These fluids and gases originate from the subducting slab as well as from the interaction of the rising fluids and melting with the overlying crust, and generate "hot spots" of microbial diversity and activity driven by the sharp redox, geochemical and often thermal gradients. Given their direct connection with the subsurface, deeply-sourced springs can be used as a window into the deep to understand processes happening at depth. To be able to use deeply-sourced springs as conduits to the subsurface we need to be able to deconvolve the surface signals from the deep subsurface ones. Despite the abundance of studies looking at the microbiology of hot springs globally, there are relatively few studies linking microbial diversity to the underlying geological processes, and especially in the backarc regions information are scarce. Here we present data on the microbial diversity of the deeply sourced springs along the backarc of the volcanic complex of Puna, Argentina, and assess the extent of influence from surface processes of the spring communities. We conclude that surrounding soil and shallow subsurface microbial communities minimally contribute to the diversity of the deeply sourced fluids that thus represent key samples to investigate the deep continental subsurface.

Deeply-sourced springs microbial diversity: a window into the deep of the Earth 


<i>**Session Chairs: **Giuliana Panieri (CAGE - Tromso), Patrizia Fumagalli (University of Milano - Statale), Marcello Natalicchio (University of Torino)</i><br><br>


S16. Extreme environments

technical paper

**Attenzione, gli orari riportati nel PROGRAMMA (icona calendario) si riferiscono al fuso orario locale dell’utente. Il fuso orario ufficiale del Congresso è Central European Time (CET).**

L'Istituto Nazionale di Oceanografia e Geofisica Sperimentale - OGS e il Dipartimento di Matematica e Geoscienze dell'Università di Trieste sono orgogliosi di ospitare il 90° Congresso della Società Geologica Italiana a Trieste dal 14 al 16 settembre 2021. La modalità del congresso è interamente online.

Con il motto "Geologia senza frontiere" questo evento mira a promuovere le Scienze della Terra come disciplina scientifica proiettata nel futuro, oltre i confini geografici, politici e disciplinari, per comprendere meglio l'interno del Pianeta Terra e la struttura del sottosuolo, difendere la società da pericolosi eventi geologici, comprendere meglio la variabilità climatica, pianificare l'utilizzo delle georisorse in modo etico e nel rispetto dell'ambiente.


**Please note, times listed in the SCHEDULE tab (calendar icon) reflect YOUR LOCAL TIME ZONE. The main timezone for this conference will be Central European Summer Time.**

The National Institute of Oceanography and Experimental Geophysics - OGS and the Department of Mathematics and Geosciences of the University of Trieste are proud to host the 90th Congress of the Italian Geological Society in Trieste on 14-16 September 2021.  The Congress will be held entirely online.

With the motto "Geology Without Borders" this event aims to promote Earth Sciences as a scientific discipline projected into the future, beyond geographical, political and disciplinary boundaries, to better understand the interior of Planet Earth and the structure of the subsurface, defend society from dangerous geological events, better understand climatic variability, plan the use of geo-resources in an ethical way and respecting the environment.


Welcome to the SGI2021 virtual conference.  In order to access the conference and content, [please register for the meeting here](https://www.geoscienze.org/trieste2021/index.php/registrazioni/registrati)

Please register for the SGI conference to join the event.

SGI 2021

Earth Sciences should be understood not only as necessary for a better understanding of the interior of the planet Earth, but also as a defense of society from dangerous geological events, for the understanding of climatic variations, for the planning and use of georesources in a ethical and respecting and protecting the environment.

Martina Cascone

1

SHORT BIO

Presentations

Deeply-sourced springs microbial diversity: a window into the deep of the Earth

Stay up to date with the latest Underline news!

PRESENTATIONS

CONFERENCES

COMPANY

RESOURCES