%0 Journal Article %T The Medial Offshore Record of Explosive Volcanism Along the Central to Eastern Aegean Volcanic Arc: 2. Tephra Ages and Volumes, Eruption Magnitudes and Marine Sedimentation Rate Variations %+ Helmholtz Centre for Ocean Research [Kiel] (GEOMAR) %+ Laboratoire Magmas et Volcans (LMV) %+ School of Natural Sciences and ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Tasmania, Hobart, Tasmania, 7001, Australia %+ National and Kapodistrian University of Athens (NKUA) %A Kutterolf, S. %A Freundt, A. %A Druitt, T. %A Mcphie, J. %A Nomikou, P. %A Pank, K. %A Schindlbeck‐belo, J., C %A Hansteen, T., H %A Allen, S., R %Z co-auteur étranger %< avec comité de lecture %Z Challenge 4 %@ 1525-2027 %J Geochemistry, Geophysics, Geosystems %I AGU and the Geochemical Society %V 22 %N 12 %8 2021-12-02 %D 2021 %R 10.1029/2021GC010011 %Z Sciences of the Universe [physics]/Earth Sciences/VolcanologyJournal articles %X We use the tephrostratigraphic framework along the Aegean Volcanic Arc established in Part 1 of this contribution to determine hemipelagic sedimentation rates, calculate new tephra ages, and constrain the minimum magnitudes of (sub)plinian eruptions of the last 200 kyrs. Hemipelagic sedimentation rates range from ∼0.5 cm/kyr up to ∼40 cm/kyr and vary laterally as well as over time. Interpolation between dated tephras yields an eruption age of ∼37 ka for the Firiplaka tephra, showing that explosive volcanism on Milos is ∼24 kyrs younger than previously thought. The four marine Nisyros tephras (N1 to N4) identified in Part 1 (including the Upper (N1) and Lower (N4) Pumice) have ages of ∼57 ka, ∼63 ka, ∼69 ka, and ∼76 ka, respectively. Eruption ages for the Yali-1 and Yali-2 tephras are ∼55 ka and ∼34 ka, respectively. The Yali-2 tephra comprises two geochemically and laterally distinct marine facies. The southern facies is identical to the Yali-2 fall deposit on land but the western facies has slightly less evolved glass compositions. Overall, erupted plinian and co-ignimbrite fall tephra volumes range from <1 to 56 km3 (excluding possible caldera fillings and ignimbrite volumes), and 80% of the eruptions had magnitude 5.5 < M ≤ 7.2 (M = log(m)-7; m = erupted magma mass in kg). Twenty percent of the tephras represent 3.2 < M < 5.5 eruptions. The long-term average tephra magma mass flux through highly explosive eruptions of Santorini is estimated at ∼40 kg/s. The analogous data for the Kos-Yali-Nisyros volcanic complex is less-well constrained but similar to Santorini. %G English %2 https://uca.hal.science/hal-03554038/document %2 https://uca.hal.science/hal-03554038/file/Geochem%20Geophys%20Geosyst%20-%202021%20-%20Kutterolf%20-%20The%20Medial%20Offshore%20Record%20of%20Explosive%20Volcanism%20Along%20the%20Central%20to%20Eastern.pdf %L hal-03554038 %U https://uca.hal.science/hal-03554038 %~ IRD %~ INSU %~ PRES_CLERMONT %~ CNRS %~ LMV %~ ACL-SF %~ OPGC %~ CAP20-25 %~ ANR %~ TEST3-HALCNRS