Radio-dating analysis and reconstruction of past events in a semi-closed deep basin, north Cretan Basin
Περίληψη
The present study investigates recent environmental variations and potential contamination within a semi-enclosed marine basin by examining sediment cores, which serve as both archives and ultimate sinks of particulate and dissolved matter. Sediment samples were retrieved using a box corer and analyzed through high-resolution gamma-ray spectrometry to quantify radionuclide activities and determine bulk density.
The sedimentation rate was derived from the depth distribution of excess 210Pb, with 226Ra used as a supporting radionuclide for equilibrium assessment. A distinct tephra layer identified at 10.5 cm depth was radiometrically dated to approximately 1650 CE, indicating deposition from the Kolumbo volcanic eruption. Notably, the peak activity of natural radionuclides occurs at 9.5 cm, reflecting post-eruptive sedimentary processes.
The lower values of the sedimentation rate observed in this deep basin, compared to the basins of the North and central Aegean Sea, is attributed to its remoteness from direct terrestrial inputs. Furthermore, the relationship between 226Ra and 212Pb delineates two distinct depositional regimes—one preceding and one following the tephra horizon—demonstrating differences in sediment dynamics and related processes.
Λεπτομέρειες άρθρου
- Πώς να δημιουργήσετε Αναφορές
-
Maniati, Z., Tsabaris, C., Androulakaki, E., Alexakis, S., Patiris, D., Manta, K., & Kokkoris, M. (2026). Radio-dating analysis and reconstruction of past events in a semi-closed deep basin, north Cretan Basin. Annual Symposium of the Hellenic Nuclear Physics Society, 32, 136–143. https://doi.org/10.12681/hnpsanp.8838
- Τεύχος
- Τόμ. 32 (2026): HNPS2025
- Ενότητα
- Oral contributions
Αυτή η εργασία είναι αδειοδοτημένη υπό το CC Αναφορά Δημιουργού – Μη Εμπορική Χρήση – Όχι Παράγωγα Έργα 4.0 4.0.
Αναφορές
Georgia Kousidou, Christos Tsabaris, Filothei Pappa, Effrosyni Androulakaki, Gerasimos Korres, and Evangelia Krassakopoulou. “Impact of climate change to sedimentation processes and microplastics gradients: a case study in a semi-closed deep ocean system, Lemnos basin, Greece”. In: 31 (2025), 96–101. doi: 10.12681/hnpsanp.7999
J. Liu, X. Zhao, N. Chen, Q. Liu, M. Zhang, L. Zhang, R. Novikau, and X. Hou. “The transport, distribution, and budget of anthropogenic 129I in the Bohai and North Yellow Seas, China”. In: Journal of Hazardous Materials 487 (2025), p. 137101. issn: 0304-3894. doi: 10.1016/j.jhazmat.2025.137101
A. Ghanem, A. Nada, H. Abozeid, S. Madcour W.and Shetaia, and N. Imam. “Historical trends of heavy metals applying radio-dating and neutron activation analysis (NAA) in sediment cores, Burullus Lagoon, Egypt”. In: Environmental Science and Pollution Research 31 (June 2024), pp. 43633–43658. doi: 10.1007/s11356-024-33761-5
F.K. Pappa, C. Tsabaris, D. Patiris, E. Androulakaki, G. Eleftheriou, C. Betsou, V. Michalopoulou, M. Kokkoris, and R. Vlastou. “Historical trends and assessment of radionuclides and heavy metals in sediments near an abandoned mine, Lavrio, Greece”. In: Environmental Science and Pollution Research 25 (Oct. 2018), pp. 1–17. doi: 10.1007/s11356-018-2984-0
F.K. Pappa, C. Tsabaris, D.L. Patiris, E.G. Androulakaki, A. Ioannidou, G. Eleftheriou, M. Kokkoris, and R. Vlastou. “Dispersion pattern of 226Ra and 235U using the ERICA Tool in the coastal mining area, Ierissos Gulf, Greece”. In: Applied Radiation and Isotopes 145 (2019), pp. 198–204. issn: 0969-8043. doi: 10.1016/j.apradiso.2018.12.021
A. Vinković et al. “Could atmospheric carbon be driving sedimentation?” In: Journal of Soils and Sediments 22 (July 2022). doi: 10.1007/s11368-022-03282-0
C. Tsabaris, G. Kousidou, E. Androulakaki, D. Patiris, F.K. Pappa, D. Marmara, and E. Krasakopoulou. “Reconstruction of radioactivity and microplastic particles studying sedimentation/accumulation in the deep Lemnos basin, North Aegean Sea, Greece”. In: Journal of Soils and Sediments 24 (Sept. 2024), pp. 3938–3952. doi: 10.1007/s11368-024-03907-6
G. Eleftheriou, C. Tsabaris, D. Papageorgiou, D. Patiris, E.G. Androulakaki, and F.K. Pappa. “Radiometric dating of sediment cores from aquatic environments of north-east Mediterranean”. In: Journal of Radioanalytical and Nuclear Chemistry 316 (Mar. 2018). doi: 10.1007/s10967-018-5802-8
S. E. Poulos. “Water Masses of the Mediterranean Sea and Black Sea: An Overview”. In: Water (Switzerland) 15.18 (2023). doi: 10.3390/w15183194.
D. Kassis, E. Krasakopoulou, G. Korres, G. Petihakis, and G. Triantafyllou. “Hydrodynamic features of the South Aegean Sea as derived from Argo T/S and dissolved oxygen profiles in the area”. In: Ocean Dynamics 66 (Sept. 2016). doi: 10.1007/s10236-016-0987-2
F. Fouque and A. R. McBirney. “Santorini and its eruptions”. In: 1998. url: https://api.semanticscholar.org/CorpusID:127842208
U. Barnekow, S. Fesenko, V. Kashparov, G. Kis-Benedek, G. Matisoff, Yu. Onda, N. Sanzharova, S. Tarjan, A. Tyler, and B. Varga. Guidelines on Soil and Vegetation Sampling for Radiological Monitoring, Technical Reports Series No. 486. Tech. rep. International Atomic Energy Agency, 2019.
E. Georgali and ... et al. “Characterization of the Canberra BE5030 Broad Energy High Purity Germanium Detector by means of the GEANT4 Monte Carlo simulation package”. In: HNPS Advances in Nuclear Physics 27 (2020), 152–154. doi: 10.12681/hnps.3002
C.A. Kalfas, M. Axiotis, and C. Tsabaris. “SPECTRW: A software package for nuclear and atomic spectroscopy”. In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 830 (2016), pp. 265–274. issn: 0168-9002. doi: 10.1016/j.nima.2016.05.098.
G. Eleftheriou, C. Tsabaris, E.G. Androulakaki, F.K. Pappa, and D.L. Patiris. “High resolution gamma-ray spectrometry for routine measurements of environmental samples”. In: Applied Radiation and Isotopes 206 (2024), p. 111234. issn: 0969-8043. doi: 10.1016/j.apradiso.2024.111234.
Tim Vidmar. “EFFTRAN—A Monte Carlo efficiency transfer code for gamma-ray spectrometry”. In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 550.3 (2005), pp. 603–608. issn: 0168-9002. doi: 10.1016/j.nima.2005.05.055
F.K. Pappa, C. Tsabaris, D. Patiris, E. Androulakaki, G. Eleftheriou, C. Betsou, V. Michalopoulou, M. Kokkoris, and R. Vlastou. “Historical trends and assessment of radionuclides and heavy metals in sediments near an abandoned mine, Lavrio, Greece”. In: Environmental Science and Pollution Research 25 (Oct. 2018), pp. 1–17. doi: 10.1007/s11356-018-2984-0
J.A. Sanchez-Cabeza and A.C. Ruiz-Fernández. “210Pb sediment radiochronology: An integrated formulation and classification of dating models”. In: Geochimica et Cosmochimica Acta 82 (2012). Environmental Records of Anthropogenic Impacts, pp. 183–200. issn: 0016-7037. doi: 10.1016/j.gca.2010.12.024.
Zhi-jun Dai, Jinzhou Du, Ao Chu, and Xiao-Ling Zhang. “Sediment characteristics in the North Branch of the Yangtze Estuary based on radioisotope tracers”. In: Environmental Earth Sciences - ENVIRON EARTH SCI 62 (Apr. 2011), pp. 1629–1634. doi: 10.1007/s12665-010-0647-7.
M. Klaver, S. Carey, P. Nomikou, I. Smet, A. Godelitsas, and P.Z. Vroon. “A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc”. In: Geochemistry, Geophysics, Geosystems 17 (July 2016). doi: 10.1002/2016GC006398
