ChiFlux - Identification and investigation of fluid flux, mass wasting and sediments in the forearc of the central Chilean subduction zone – First results from SONNE cruise SO-210.

Linke, Peter, Freundt, Armin, Geersen, Jacob, Kutterolf, Steffen, Liebetrau, Volker, Rovelli, Lorenzo, Scholz, Florian, Sommer, Stefan, Steeb, Philip, Treude, Tina and Völker, David (2010) ChiFlux - Identification and investigation of fluid flux, mass wasting and sediments in the forearc of the central Chilean subduction zone – First results from SONNE cruise SO-210. [Talk] In: SFB 574 SUBDUCTION WORKSHOP. , 04.-07.11.2010, Pucon, Chile .

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Abstract

The overarching goal of SFB 574 is to understand the role and fate of volatiles and fluids in subduction zones. Both components have a major influence on, e.g., short- and long-term climate change, the geochemical evolution of the
hydrosphere and atmosphere, as well as subduction-related natural hazards, such as earthquakes, volcanic eruptions and tsunamis, because they are cycled through the entire subduction system. The Chilean margin, which switched from erosion to accretion within the last several million years, has been chosen for the remainder of the SFB. Major goals of cruise SO-210 are:
1) to investigate and quantify the dewatering processes in the forearc of the central Chilean subduction zone, in particular the origin and output flux of vent
fluids and volatiles, 2) to study biological processes fuelled by this discharge, 3) to use cold seep carbonates as a geochemical archive of cold seep activity, 4) to evaluate the role of forearc fluids in triggering mass wasting events that could generate tsunamis, 5) to characterize geochemically the subducting sediments to determine the input flux of climate-relevant volatiles and a
variety of trace elements, and 6) to investigate the distribution of volcanic ashes to improve estimates on the volume of material emitted by volcanic eruptions and to date distinct events within the sedimentary sequence.
Preliminary investigations by Chilean colleagues revealed definite indications of fluid venting which together with recent geophysical investigations are the basis for the present cruise. Here, we will present preliminary results and new discoveries made during the cruise.

Document Type: Conference or Workshop Item (Talk)
Keywords: Meeresgeologie; subduction zone
Research affiliation: OceanRep > SFB 574 > C4
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-JRG-A2 Seafloor Warming
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
OceanRep > SFB 574 > A1
OceanRep > SFB 574 > B6
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
OceanRep > SFB 574 > B3
Date Deposited: 07 Dec 2010 12:42
Last Modified: 23 Feb 2012 04:58
URI: http://oceanrep.geomar.de/id/eprint/10374

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