Publication Date:
2023-11-20
Description:
Key Points
High-resolution reflection seismic data reveals that the internal architecture of the
Kolumbo Volcanic Chain
The Kolumbo Volcanic Chain evolved during two episodes along NE-SW striking normal
faults
A prominent volcanic ridge connects the Kolumbo Volcanic Chain with Santorini
highlighting a former connection between both systems
Abstract
The Christiana-Santorini-Kolumbo volcanic field in the southern Aegean Sea is one of the most
hazardous volcanic regions in the world. Forming the northeastern part of this volcanic field, the
Kolumbo Volcanic Chain (KVC) comprises more than
submarine volcanic cones. However,
due to their inaccessibility, little is known about the spatio-temporal evolution and tectonic control
of these submarine volcanoes and their link to the volcanic plumbing system of Santorini. In this
study, we use multichannel reflection seismic imaging to study the internal architecture of the
KVC and its link to Santorini. We show that the KVC evolved during two episodes, which initiated
at ~1 Ma with the formation of mainly effusive volcanic edifices along a NE-SW trending zone.
The cones of the second episode were formed mainly by submarine explosive eruptions between
0.7 and 0.3 Ma and partly developed on top of volcanic edifices from the first episode. We identify
two prominent normal faults that underlie and continue the two main trends of the KVC, indicating
a direct link between tectonics and volcanism. In addition, we reveal several buried volcanic
centers and a distinct volcanic ridge connecting the KVC with Santorini, suggesting a connection
between the two volcanic centers in the past. This connection was interrupted by a major tectonic
event and, as a result, the two volcanic systems now have separate, largely independent plumbing
systems despite their proximity
Type:
Article
,
NonPeerReviewed
,
info:eu-repo/semantics/article
Format:
text
Format:
text