Abstract

Six cores, up to 2 m thick, were drilled during a multibeam and high-resolution seismic survey guided in the Vlora Bay with multidisciplinary objectives. In this work the results of grain size and mineralogical analyses of 29 samples are presented. The samples were collected from each core at the top and bottom, further at different depths where any textural changes were evident. Results from grain size analyses allow the comparison of the sediments both in the time (stratigraphic sense) and in the space among different cores. The samples show a good homogeneity: clayey silts in most parts of the core. Only one core presents some intervals with 70% sand and gravel. These samples have mainly a biogenic component, which suggest reworking and mechanical concentrations. The greatest amounts of bioclasts in the core closer to the eastern coast is significant. Results from mineralogical analyses show some differences only in the composition of sands , whereas the clays and silts are mainly composed of clay minerals and secondarily of quartz, feldspar, calcite, and dolomite.The sandy fractions are composed of quartz, muscovite, monazite, and particularly of bioclasts (locally covered with pyrite coatings), clay aggregates, coal, and anthropic material. The results indicate a basin supplied by a mainly terrigenous source, represented by many rivers of the eastern side. Coarse-grained sediments are lacking and are only documented by bioclastic concentrations. The pyrite coatings may indicate only a low rate of anoxic conditions.

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