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Santorini's eruptive past from new deep-drilled marine tephra records. IODP Expedition 398 Hellenic Arc Volcanic Field.

^^Katharina Pank^1^, Steffen Kutterolf1, Abigail Metcalfe2, Tim Druitt2, Axel Schmitt32,33, Kuo-Lung Wang30,31, Hao-Yang Lee30, Thomas Ronge3, Sarah Beethe4, Alexis Bernard5, Carole Berthod6, Hehe Chen7, Shun Chiyonobu8, Acacia Clark9, Susan DeBari10, Ralf Gertisser11, Christian Hübscher12, Raymond Johnston13, Christopher Jones14, Kumar Batuk Joshi15, Günther Kletetschka16, Olga Koukousioura17, Xiaohui Li18, Michael Manga19, Molly McCanta20, Iona McIntosh21, Antony Morris22, Paraskevi Nomikou23, Ally Peccia24, Tatiana Fernandez Perez25, Paraskevi Polymenakou26, Jonas Preine12, Masako Tominaga27, Adam Woodhouse28, Yuzuru Yamamoto29

  • Affiliations:  1GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1-3, D-24148 Kiel, Germany; 2University Clermont-Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, Clermont-Ferrand, France; 3International Ocean Discovery Program, Texas A&M University, College Station TX 77845, USA; 4College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis OR 97333, USA; 5Laboratoire des Fluides Complexes et leurs Réservoirs, Université de Pau et des Pays de l'Adour, F-64000 Pau, France; 6Institut De Physique Du Globe De Paris, Centre National de la Recherche Scientifique (CNRS), 75005 Paris, France ; 7School of Ocean Sciences, China University of Geosciences, 100083 Haidan District, Beijing, China; 8Faculty of International Resource Sciences, Akita University, Akita, Akita Prefecture 0108502, Japan; 9School of Natural Sciences/CODES, University of Tasmania, Hobart 7005, Australia; 10Geology Department, Western Washington University, Bellingham WA 98225, USA 11School of Geography, Geology and the Environment, Keele University, Staffordshire ST5 5BG, UK; 12Institute of Geophysics, University of Hamburg, Bundesstrasse 55, D-20146 Hamburg, Germany; 13School of Geosciences, University of South Florida, Tampa FL 33620, USA; 14Department of Earth and Planetary Sciences, University of California, Riverside CA 92506, USA; 15Solid Earth Research Group, National Centre for Earth Science Studies, Thiruvananthapuram, Kerala 695011, India; 16Geophysical Institute, University of Alaska Fairbanks, 324 Reichard Building, Fairbanks Alaska 99709, USA; 17Key Laboratory of Submarine Geoscience and Prospecting Techniques, Ocean University of China, Qingdao, China; 18School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; 19Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, USA; 20Department of Earth and Planetary Sciences,University of Tennessee, Knoxville TN 37996-1526, USA; 21Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka Kanagawa 237-0061, Japan; 22School of Geography, Earth and Environmental Sciences, Plymouth University, Drake Circus, Plymouth PL4 8AA, UK; 23Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15784 Athens, Greece; 24Lamont-Doherty Earth Observatory, Columbia University, Palisades NY 10964, USA; 25Department of Geology, Kent State University, 221 McGilvrey Hall, 325 S Lincoln Street, Kent OH 44242, USA; 26Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece; 27Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole MA 02543, USA; 28School of Earth Sciences, University of Bristol, BS8 1RJ, Bristol, UK; 29Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan; 30Institute of Earth Sciences, Academia Sinica, Taipei, 11529, Taiwan; 31Department of Geosciences, National Taiwan University, Taipei, Taiwan; 32 John de Laeter Centre, Curtin University, Perth, WA, 6845, Australia; 33 Institut für Geowissenschaften, Universität Heidelberg, Heidelberg, Germany 

  • Presentation type: Poster

  • Presentation time: Tuesday 16:30 - 18:30, Room Poster Hall

  • Poster Board Number: 144

  • Programme No: 3.13.13

  • Theme 3 > Session 13

Abstract

Santorini Volcano belongs to the Christiana-Santorini-Kolumbo Volcanic Field (CSKVF), the southernmost volcanic field of the South Aegean Volcanic Arc. Known for its highly explosive volcanism and caldera-forming eruptions, Santorini's terrestrial volcanic deposits have been extensively studied, revealing activity from c. 650 ka to present. While terrestrial records show that Santorini's volcanism evolved from predominantly  phreatomagmatic and effusive eruptions (650-360 ka) to more explosive activity including several Plinian and caldera forming events (360 -- 3.6 ka), only the last 200 kyr of volcanic activity are well constrained. The early history of the volcanic field, however, lacks a continuous eruption record. Here, we present the revised tephrochronostratigraphy of Santorini Volcano using marine sediments from eight drill sites within the CSKVF drilled during IODP Expedition 398. Geochemical fingerprinting of the tephras enabled the identification of most of the known Plinian eruptions of young Santorini, as well as numerous "new" volcanic events related to interplinian phases. Furthermore, our results show that explosive volcanism occurred long before 360 ka. These findings highlight the importance of complementary (marine-terrestrial) studies to reveal the most complete eruption history of volcanic systems.