Chemosynthetic habitats and biogeochemical processes at the Chilean methane seepage area – preliminary results from the SO210 expedition.

Treude, Tina , Scholz, Florian, Steeb, Philip, Domeyer, Bettina, Surberg, Regina, Lomnitz, Ul and Linke, Peter (2010) Chemosynthetic habitats and biogeochemical processes at the Chilean methane seepage area – preliminary results from the SO210 expedition. [Talk] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .

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Abstract

The Chilean methane seepage area (CMSA) is characterized by patchy islands of chemosynthetic communities embedded in carbonate outcrops or plain sediment areas. The communities were often found to be dominated by one type of chemosynthetic organism: bacterial mat (Beggiatoa Sp.), clam
fields (Calyptogena Sp., Archivesica Sp.), tubeworms (Lamellibrachia), and pogonophorans. Some samples revealed chemosynthetic organisms below the surface such as the clam Tyosira Sp. and the sulfur bacteria Thioploca.
Other sites revealed indications of successions from a less to a more active seepage site (e.g., high-sulfidic sediments containing clam shells) or vice versa (e.g., sulfide-free sediments containing clam shells). This presentation will provide a preliminary overview of chemosynthetic communities and geochemical profiles at the CMSA and their implications for methane seepage and consumption activity in sediments.

Document Type: Conference or Workshop Item (Talk)
Keywords: Meeresgeologie; subduction
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-JRG-A2 Seafloor Warming
OceanRep > SFB 574
OceanRep > SFB 574 > B3
Date Deposited: 07 Dec 2010 12:49
Last Modified: 23 Feb 2012 05:38
URI: http://oceanrep.geomar.de/id/eprint/10376

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