Origin and Distribution of Clay Minerals in the Alexandroupolis Gulf, Aegean Sea, Greece

Pehlivanoglou, K.; Tsirambides, A.; Trontsios, G.

doi:10.1006/ecss.1999.0620

Cited by 19 publications

(13 citation statements)

References 13 publications

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“…The major sources for the illites are abundant metamorphic rocks and clastic post-alpidic formations and their soils that occur in the drainage basin of the major rivers. Large quantities of illite can be supplied from the gneisses, schists, phyllites, and the easily erodable flysch and molasse sediments (Lykousis et al 1981;Conispoliatis and Lykousis 1986;Poulos et al 1996;Pehlivanoglou et al 2000;Karageorgis et al 2005). The delivery of illite by rivers is evident, because highest concentrations of up to 80% are found close to the river mouths in the northwest Aegean Sea.…”

Section: Northwest Aegean Province (I)mentioning

confidence: 94%

Distribution of clay minerals in surface sediments of the Aegean Sea: a compilation

Ehrmann

Schmiedl

Hamann

et al. 2006

Int J Earth Sci (Geol Rundsch)

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Section: Northwest Aegean Province (I)mentioning

confidence: 94%

Distribution of clay minerals in surface sediments of the Aegean Sea: a compilation

Ehrmann

Schmiedl

Hamann

et al. 2006

Int J Earth Sci (Geol Rundsch)

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“…However, the low content of kaolinite may be due to unfavorable climatic and physicochemical conditions, as well as to the detrital origin, rapid transport and deposition of the weathered material in the Gulf. Furthermore, the low percentage of the interstratified illite/smectite, as well as some presence of amphiboles even in the clay fractions of the discharged material, confirm the limited reworking and weathering of the primary ferromagnesian minerals because of the high river discharge over short time periods and rapid deposition in the Gulf (Pehlivanoglou et al, 2000).…”

Section: Alexandroupolis Gulfmentioning

confidence: 72%

“…This flocculation process is enhanced by the physico-chemical conditions of the seawater (e.g. salinity, temperature, pH, and Eh) (Pehlivanoglou et al, 2000).…”

Section: Alexandroupolis Gulfmentioning

confidence: 99%

“…The hydrodynamic regime and physical grain size are the main mechanisms, which control the distribution of the clay minerals in the Gulf. The low content of kaolinite in all samples and the presence in traces of chlorite and amphiboles in some coarse clay fractions may be due to the unfavourable climatic and physicochemical conditions, as well as to the rapid transport and deposition of the weathered material(Pehlivanoglou et al, 2000).The abundance of illite and smectite in the sediments is mainly due to the weathering of primary Fe-Mg minerals of the drainage basin rocks and their transport and deposition in the Gulf. Especially, the abundance of smectite is enhanced by the high Fe and organic content, which results in a rapid flocculation and settling out of smectite Volume 55…”

mentioning

confidence: 94%

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Texture and mineralogical composition of Quaternary terrestrial and marine sediments from Macedonia and Thrace, Greece

Tsirambides

2019

geosociety

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Clastic sediments collected from land and gulfs of Macedonia and Thrace in Greece are examined on the basis of their texture and mineral composition. All terrestrial samples are coarse-grained and poorly sorted, with angular to sub-angular grains. These are mainly composed of quartz and feldspars, followed by micas, calcite and Fe-Mg minerals. Among the clay minerals illite predominates over smectite and smectite over vermiculite (+chlorite+kaolinite). In addition, the interstratified phases illite/smectite, chlorite/vermiculite, and smectite/vermiculite are present in significant amounts in the clay fraction (<2 μm), signifying the incomplete weathering of the primary minerals. Mixing during transportation, flocculation, differential settling processes and organic matter are the main mechanisms for the distribution of the discharged terrigenous load into the North Aegean Gulfs. All gulf bottom samples are coarse to fine grained and medium sorted, and their grains are angular to sub-angular. Quartz and feldspars predominate. In addition, biogenic calcite, micas and various Fe-Mg minerals exist as primary and/or accessory minerals. Among clay minerals, illite predominates over smectite and smectite over kaolinite (+chlorite+vermiculite). Almost in all gulf sediments the interstratified phase illite/smectite is apparent. The presence of feldspars and Fe-Mg minerals, as well as the high content of clay minerals and the polymodal grain-size distribution with angular to sub-angular grains, signify mineralogical and textural immaturity of all the examined sediments, as well as predominance of mild climatic conditions and thus mild weathering processes. The quartz content in these sediments is usually <70%. Therefore, a sedimentation cycle of these materials has not been completed.

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“…The rapid economic growth and settlement can drive the release of waste materials into the coastal area and accumulate into the sediment. Later, the chemicals and their compounds can re-circulate into the water column through the absorption onto the suspended particulate matter [1][2][3][4][5]. Most particles transformed into various chemical species before reaching the seafloor.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Brunei Bay Sediment Cores Sedimentation Rate Using 210Pb Radiometric Dating Technique

Joseph

Ghazali

Shazili

et al. 2018

IJET

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The use of radioisotopes 210Pb and 226Ra in establishing the geochronology of pollutants in the sediment core and sediment dating is being widely used in the world. The present study was conducted in Brunei Bay region of Malaysian waters to define the sedimentation rate and sediment age as well as to investigate the possible sources of pollutants into this bay. Sediment core samples were cut by layers, dried and analyzed using High Purity Germanium (HPGe) Spectrometer. Results obtained marked the time interval of 1875, 1956, 1962 and 1945 for sediment core B5, B9, B13 and LB consecutively. Sediment core of B9 and LB showed higher sedimentation rate compared to B5 and B13 due to the rapid development of urban and industrial. The increasing of sedimentation rate over the last 25 years was in line with the increasing of human activities surround the bay. Additionally, the health and distribution of mangroves surround Brunei Bay were important to determine the sediment movement which will affect the sedimentation rate in the bay. Overall, by controlling human activities as well as sustaining the mangroves population, could maintain and preserve the natural and unique environment of Brunei Bay.

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Origin and Distribution of Clay Minerals in the Alexandroupolis Gulf, Aegean Sea, Greece

Cited by 19 publications

References 13 publications

Distribution of clay minerals in surface sediments of the Aegean Sea: a compilation

Distribution of clay minerals in surface sediments of the Aegean Sea: a compilation

Texture and mineralogical composition of Quaternary terrestrial and marine sediments from Macedonia and Thrace, Greece

The Evaluation of Brunei Bay Sediment Cores Sedimentation Rate Using 210Pb Radiometric Dating Technique

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