EGU25-4561, updated on 14 Mar 2025
https://doi.org/10.5194/egusphere-egu25-4561
EGU General Assembly 2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Poster | Thursday, 01 May, 08:30–10:15 (CEST), Display time Thursday, 01 May, 08:30–12:30
 
Hall X2, X2.54
Low heat flow in the northeastern Anhydros Basin, Aegean Sea, recorded by deep subsurface temperatures
Michael Manga1 and the IODP Expedition 398 Scientists*
Michael Manga and the IODP Expedition 398 Scientists
  • 1University of California, Berkeley, Berkeley, United States of America (manga@seismo.berkeley.edu)
  • *A full list of authors appears at the end of the abstract

International Ocean Discovery Program (IODP) Expedition 398 to the South Aegean Volcanic Arc measured subseafloor temperatures in a drilled hole in the Anhydros Basin, Aegean Sea. The coldest and highest temperatures were 13.9 oC at 52.5 meters below seafloor (mbsf) and 15.5 oC for the deepest measurement at 360.4 mbsf, respectively. The modeled heat flow is low (~0.023 W/m2) despite active magmatism and rifting in the region.  The cool subsurface temperatures to depths exceeding 300 m also record cold seafloor temperatures during the last glacial period. The low heat flow reflects a combination of recent Pliocene initiation of rifting, thin crust that is less radiogenic than average continental crust, and tectonic separation from the Christiana-Santorini-Kolumbo volcanic field such that there are minimal magmatic influences on heat flow.

IODP Expedition 398 Scientists:

Michael Manga, Masako Tominaga, Jonas Preine, Thomas A. Ronge, Sarah Beethe, Christian Hübscher, Iona McIntosh, Paraskevi Nomikou, Steffen Kutterolf, Tim Druitt, Alexis Bernard, Carole Berthod, Hehe Chen, Acacia Clark, Susan DeBari, Tatiana I. Fernandez-Perez, Ralf Gertisser, Raymond M. Johnston, Christopher K. Jones, K. Batuk Joshi, Günther Kletetschka, Olga, Koukousioura, Molly McCanta, Antony Morris, Katharina Pank, Ally Peccia, Paraskevi N. Polymenakou, Adam Woodhouse, Yuzuru Yamamoto

How to cite: Manga, M. and the IODP Expedition 398 Scientists: Low heat flow in the northeastern Anhydros Basin, Aegean Sea, recorded by deep subsurface temperatures, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-4561, https://doi.org/10.5194/egusphere-egu25-4561, 2025.