Dynamic of Mud Volcanoes and Seeps in the Calabrian Accretionary Prism, Ionian Sea - Cruise No. M112 - November 06 - December 15, 2014 - Catania (Italy) - Catania (Italy)

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Dokumentinformationen

  • Schriftenreihe:
  • Format / Umfang:
    63 pages
  • ISSN:
  • DOI:
  • Medientyp:
    Report
  • Format:
    Elektronische Ressource
  • Sprache:
    Englisch
  • Klassifikation:
    DDC:    550 Earth sciences and geology

Abstract

R/V METEOR cruise M112 is a contribution to the project GB3 within the research program "The Ocean in the Earth System", MARUM Center for Marine Environmental Sciences of the University of Bremen funded through the Cluster of Excellence EXC 3009 / FTZ 15. Within project GB3 of Research Area "Geosphere-Biosphere Interactions" the contributions of cold seeps to geological processes, carbon fluxes, and ecosystem diversity is the topic and mud volcanoes of the Anaximander Mountains in the Mediterranean Sea are forming hot spots in the colonization of chemosynthetic seep animals. The cruise planned to follow the hypothesis that gas hydrates formed from high methane flux rates combined with freshwater fluids in the mud volcanoes are influencing the high abundance of chemosynthetic live in that submarine mountain area. Due to unforeseen problems in getting the research permission in Turkish waters the program to investigate mud volcanoes was shifted to mud volcanoes of the Calabrian Arc in Italian waters, where 54 potential mud volcanoes have been documented from which it was not clear how active the volcanism was. After detailed hydro-acoustic surveys during M112 in the inner and outer pre-Messinian and in the youngest part of post-Messinian accretionary prism, the cruise documented more than 70 mud volcanoes from which only Venere Mud Volcano was currently active forming 5 distinct gas emission sites with well-established seeps in the center and at the rim of the caldera. 28 hydro-cast stations document how expelled methane is distributed in the surrounding water column and gravity cores and sampling during ROV dives is showing the rapid flow rates of mud emission at the volcano. Other mud volcanoes like Cetus, Satori, Pythagoras, and Nikolaus mud volcanoes have been recently active.


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