Spyros Sergiou- PhD
- Research Associate at University of Patras
Spyros Sergiou
- PhD
- Research Associate at University of Patras
Marine Geologist, Researcher
About
40
Publications
8,030
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
158
Citations
Introduction
Spyros Sergiou currently works as a researcher at the Lab. of Marine Geology and Physical Oceanography, University of Patras. Spyros holds a PhD on 'Stratigraphy and Paleoceanography of semi-enclosed marine basins'. His research interests regard geological and environmental oceanography with a special focus on the investigation of recent and former sedimentary processes in the coastal and marine environment through lithological, geochemical and micropaleontological proxies.
Current institution
Education
January 2016 - October 2022
University of Patras
Field of study
- Stratigraphy and Paleoceanography of semi-enclosed marine basins
November 2013 - June 2015
September 2008 - September 2012
Publications
Publications (40)
The southern Red Sea is a key region for investigating the effect of climate forces on a semi-closed basin. Detailed micropaleontological (planktic foraminifera) and isotopic (δ 18 Ο, δ 13 C) analyses along with reconstructions of sea surface temperature and salinity on a sediment core from the Farasan banks revealed the imprints of sea level chang...
The southern Red Sea is affected by intense interactions between monsoon and sea level changes in a semi-closed environment. Still, the impacts on the wide shelves remain poorly documented. We investigate the seafloor environmental conditions on the southern Red Sea shelf over the last 30 ka through sedimentological (visual inspection, granulometry...
The island of Astypalea (Greece), known for its rich and pristine archeological sites, encompasses a semi-enclosed silled basin that has been very susceptible to global sea levels and regional climate changes due to its relatively modern shallow sill of 4.7 m water deep that connects the Vathy bay with the adjacent Aegean Sea. To identify the causa...
The Patras Gulf Pockmark field is located in shallow waters offshore Patras City (Greece) and is considered one of the most spectacular and best-documented fluid seepage activities in the Ionian Sea. The field has been under investigation since 1996, though surveying was partially sparse and fragmentary. This paper provides a complete mapping of th...
The Gulf of Corinth represents an ideal setting for studying the impact of sea level changes and regional climate
on a semi-enclosed, syn-rift basin. Here we investigate the stratigraphic and paleoceanographic variability
recorded in the sedimentary succession of the basin over the Marine Isotope Stage (MIS) 5 period when global sea
level and clima...
Sedimentation in the Red Sea basin is governed by the complex interplay between regional atmospheric circulation , precipitation patterns, and sea level fluctuations, which altogether exert a profound control on the detrital and biogenic components of the sedimentary record. To gain a comprehensive understanding of these controls on the southern Re...
![Map modified by Griggs et al. [23] with locations of the existent point...](publication/390396571/figure/fig2/AS:11431281372581951@1744412464257/Map-modified-by-Griggs-et-al-23-with-locations-of-the-existent-point-sources-in-the_Q320.jpg)
Among Greece’s coastal areas, the Saronikos Gulf encounters the highest environmental challenges due to heavy metal contamination, caused by extensive urbanization and industrialization. In the present study, online databases were used to identify research articles focusing on the levels, patterns, and origins of the heavy metals on the gulf’s seaf...
The timing and causes for erosional events at the Kastrouli (Greece) archeological site – a Late Myceneaen with reuse in later periods – are presented. Two borehole sediment cores (max 6 m depth), collected from the footsteps of the settlement hill plain, were studied. Sedimentary analysis and luminescence dating techniques investigate and identify...
This study describes the prevalent sedimentological and geochemical patterns and investigates the environmental status of the bottom of Gialova lagoon, a highly vulnerable coastal site of the EU’s Natura 2000 network. For this task, lithological, geochemical, and microfaunal analyses of sediment samples were combined with a high-resolution bathymet...
Grain-size analysis of the sediments in borehole M0079A, which is located in the Corinth Rift, was used to explore hydrodynamic conditions and provenance in the Late Pleistcene Corinth Rift. Grain-size populations that were sensitive to the sedimentary environments were characterized by frequency distribution, particle size-standard deviation, and...
In this study we examine the paleoceanographic conditions within the Corinth Rift basin (CRb) during the last interglacial (MIS 5e; ca. 130-116 ka); a period of high sea level and enhanced humidity and increased temperature along the eastern Mediterranean region leading to the formation of sapropel S5. For this purpose, we used micropaleontological...
Research Highlights The Holocene paleoenvironmental evolution of a small semi-enclosed silled marine basin in the South Aegean Sea is controlled by both climatic and sea level variability. Within the general South Aegean region, the Holocene presents a general aridification trend toward the present. Background Coastal restricted basins are sensitiv...
The evolution of the bottom water in Amvrakikos Gulf in Ionian Sea at western Greece for a 50-year timespan was assessed by benthic foraminifera assemblages. The degradation of the bottom water of Amvrakikos has been a catalyst for the surface water degradation. The east basin has shown permanent low environmental quality in bottom waters since 198...
The central sewer of Athens had been discharging untreated sewage from 1950 until 1995 in the marine area between the island of Psyttalia and Keratsini. As a result, a surficial layer of organic mud was formed covering the seafloor. To assess the spatial and temporal distribution of metal contaminants in the area, six sediment cores were collected...
The spatial distribution of lithological characteristics, organic carbon and major / trace elements was studied in the surface sediments of the Gialova lagoon, a shallow water lagoon (<1.0 m) which is located at southwestern Peloponnesus (Greece). The sediment samples were collected on the basis of a detailed bathymetric map and the backscatter p r...
The Corinth Gulf is a semi-closed active rift basin, which alternated between marine and isolated/semi-isolated conditions as sea level fluctuated with respect to basin sills during Quaternary glacial/interglacial cycles. Results from the recent IODP Expedition 381 reveal cyclic variations of 10s-100s of kyr in sedimentation rates and basin paleoen...
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
p>This Article contains errors in Reference 40 which is incorrectly given as: Palyvos, N., Pantosti, D. & Zabci, C. Paleoseismological evidence of recent earthquakes on the 1967 Mudurnu Valley earthquake segment of the North Anatolian fault. Bull. Seis. Soc. Am. 97, 1646–1661 (2007).</p
Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present the longest and highest resolution record of sediment flux and paleoenvironmental changes when a young rift connects to the global...
The primary objective of International Ocean Discovery Program Expedition 381 was to retrieve a record of early continental rifting and basin evolution from the Corinth rift, central Greece. Continental rifting is fundamental for the formation of ocean basins, and active rift zones are dynamic regions of high geohazard potential. However, the detai...
This study presents results of an examination of planktonic and benthic foraminiferal assemblages from the upper half of a 2.64 m-long sediment gravity core retrieved from the southern Red Sea continental shelf. The examined interval corresponds to the time period of the last 16 kyr. The microfaunal associations show concurrent and concomitant vari...
Comparison of the Upper Quaternary evolution of these basins through sedimentological, chronological and paleoceanographical/paleoclimatic proxies.
Since 2006, a systematic underwater archaeological survey has been taking place around the Mazotos ancient shipwreck, dated to the fourth century BC. As this is a rare case of a coherent shipwreck site under excavation, the study of its formation processes was set as one of the main objectives of the project. For this purpose seismic profiles and c...
The Corinth rift is counted among the most active tectonic grabens in the world, with extension rates up to 15 mm/yr (Western part). These high extension rates are associated with very strong seismic events that are, occasionally, responsible for submarine mass movements. These movements, their consequential bottom currents, and the differential ri...
Geometry and kinematics of the active submarine faults over the North Aegean Trough
The Corinth rift is counted among the most active tectonic grabens in the world, with extension rates up to 15 mm/yr (Western part). These high extension rates are associated with very strong seismic events that are, occasionally, responsible for submarine mass movements. These movements, their consequential bottom currents, and the differential ri...
Questions
Questions (5)
Is there a way to descriminate detrital from biogenic calcite on an polarization microscope?
Regarding a sediment sample (sampled from >500 mbsf) of well sorted subrounded to rounded -calcareous fine silt sized- grains.
Major presence (~90% on a smear slide) of trigonal-rhomboedral calcite (3-10 microns, fine silt to clay) minerals with no associated microfossil fragments or individuals
*The area is sourounded by limestones and marl lithologies of equivalent age estimated (indicate possible detrital crabonate provinence)
Hi everyone,
Does anyone know which is the effect of hydrothermal activity in a marine sediment concerning the XRF analysis? In the case of a core of marine sediments which are the element ratios that indicate this effect? I study a region with high hydrothermal prespectives and i wonder if i can recognize them in my XRF results.
Hi everyone,
I would like to ask, which is the variance of Total Organic Carbon (T.O.C.) in a lagoon sediment. Could you refer any papers or studies relative to that subject? I would like to have a general idea about non-polluted lagoon sediments and not about the human-effective and stressed enviroments.
Thank you
Hi everyone!
I am preparing some samples for XRD (X-ray diffraction) of marine sediments in the area of Mazotos bay, Gulf of Larnaka, Cyprus. Can anyone suggest some recent papers about the petrography and mineralogy of the source rocks in this area (sedimentary cover of the Troodos' ophiolite complex, Lefkara formation, quartenary deposits)? I am asking this, in order to be aware and to compare the existing data with my results.
Thanks!
Hi. I wonder if someone could recommend to me some specific methods for a complete analysis project of a sediment core from a submarine canyon (depth: 300 m). So far, i have applied grain-size analysis and X-ray diffraction. My next steps will be: sediment dating (210Pb), X-ray fluorescence analysis and Corg as well. I would like to know what other methods are used in order to identify recent sedimentation processes in a marine area in the best way
