Τίτλος:
The Medial Offshore Record of Explosive Volcanism Along the Central to
Eastern Aegean Volcanic Arc: 1. Tephrostratigraphic Correlations
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The Milos, Christiana-Santorini-Kolumbo (CSK) and Kos-Yali-Nisyros (KYN)
volcanic complexes of the Aegean Volcanic Arc have repeatedly produced
highly explosive eruptions from at least similar to 360 ka into historic
times and still show recent unrest. We present the marine tephra record
from an array of 50, up to 7.4 m long, sediment cores along the arc
collected in 2017 during RV Poseidon cruise POS513, which complements
earlier work on distal to ultra-distal eastern Mediterranean sediment
cores. A unique set of glass-shard trace element (LA-ICPMS) compositions
complements our major element (EMP) data on 220 primary ash layers and
40 terrestrial samples to support geochemical fingerprinting for
correlations with 19 known tephras from all three volcanic complexes and
with the 39 ka Campanian Ignimbrite from the Campi Flegrei, Italy. The
correlations include 11 eruptions from CSK (Kameni, Kolumbo 1650,
Minoan, Cape Riva, Cape Tripiti, Upper Scoriae 1 and 2, Middle Pumice,
Cape Thera, Lower Pumice, Cape Therma 3). We identify a previously
unknown widespread tephra from a plinian eruption on Milos (Firiplaka
Tephra). Near the KYN we correlate marine tephras with the Kos Plateau
Tuff, the Yali 1 and Yali 2 tephras, and the Upper and Lower Pumice on
Nisyros. Between these two major tephras, we found two tephras from
Nisyros not yet observed on land. The four Nisyros tephras form a
systematic trend toward more evolved magma compositions. In the
companion paper we use the tephrostratigraphic framework established
here to constrain new eruption ages and magnitudes as a contribution to
volcanic hazard assessment.
Συγγραφείς:
Kutterolf, S.
Freundt, A.
Hansteen, T. H.
Dettbarn, R. and
Hampel, F.
Sievers, C.
Wittig, C.
Allen, S. R.
Druitt,
T. H.
McPhie, J.
Nomikou, P.
Pank, K.
Schindlbeck-Belo,
J. C.
Wang, K-L
Lee, H-Y
Friedrichs, B.
Περιοδικό:
Geochemistry, Geophysics, Geosystems
Εκδότης:
AMER GEOPHYSICAL UNION
Λέξεις-κλειδιά:
Tephrostratigraphy; Aegean Arc; Chemical fingerprinting; volcanology
DOI:
10.1029/2021GC010010
