This contribution focuses on a multidisciplinary research showing the geomorphological evolution and the beach sand composition of the Tyrrhenian shoreline between Capo Suvero promontory and Gizzeria Lido village (Calabria, southern Italy). The aim of the geomorphological analysis was to reconstruct the evolutionary shoreline stages and the present-day sedimentary dynamics along approximately 6 km of coastline. The results show a general trend of beach nourishment during the period 1870–2019. In this period, the maximum shoreline accretion value was estimated equal to + 900 m with an average rate of + 6.5 m/yr. Moreover, although the general evolutionary trend is characterized by a remarkable accretion, the geomorphological analysis highlighted continuous modifications of the beaches including erosion processes. The continuous beach modifications occurred mainly between 1953 and 1983 and were caused mainly by human activity in the coastal areas and inside the hydrographic basins. The beach sand composition allowed an assessment of the mainland petrological sedimentary province and its dispersal pattern of the present coastal dynamics. Petrographic analysis of beach sands identified a lithic metamorphi-clastic petrofacies, characterized by abundant fine-grained schists and phyllites sourced from the crystalline terrains of the Coastal Range front and carried by the Savuto River. The sand is also composed of a mineral assemblage comparable to that of the Amato River provenance. In terms of framework detrital constituents of QFL (quartz:feldspars:aphanitic lithic fragments) and of essential extraclasts, such as granitoid:sedimentary:metamorphic phaneritic rock fragments (Rg:Rs:Rm), sand maturity changes moderately from backshore to shoreface, suggesting that transport processes had a little effect on sand maturity. Moreover, the modal composition suggests that the Capo Suvero promontory does not obstruct longshore sand transport from the north. Indeed, sands displaced by currents driven by storm-wave activity bypass this rocky headland.

中文翻译：

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意大利南部第勒尼安海沿岸的海岸线演变和现代海滩沙子成分

这项贡献集中在一项多学科研究上，该研究显示了Capo Suvero海角和Gizzeria Lido村（意大利南部的卡拉布里亚）之间的第勒尼安海岸线的地貌演化和海滩沙子成分。地貌分析的目的是重建沿海岸线约6 km的演化海岸线阶段和当今的沉积动力学。结果表明，在1870年至2019年期间，海滩营养状况呈总体趋势。在此期间，最大海岸线吸积值估计等于+ 900 m，平均速率为6.5 m / yr。此外，尽管总体演化趋势以增生为特征，但地貌学分析强调了海滩的持续变化，包括侵蚀过程。连续的海滩改造主要发生在1953年至1983年之间，主要是由于沿海地区和水文盆地内部的人类活动造成的。沙滩砂的组成可以评估大陆岩石学沉积省及其目前沿海动力的扩散模式。沙滩砂岩的岩石学分析确定为岩性变质碎屑岩相，其特征是丰富的细片岩片和千枚岩，这些片岩和片岩取自沿海山脉前缘的结晶地形，由萨武托河携带。沙子还由与阿马托河（Amato River）物源相当的矿物组成。就QFL的骨架碎屑成分（石英：长石：甲壳石质碎屑）和必要的碎屑岩（如花岗质：沉积岩）而言：变质的白云岩碎屑（Rg：Rs：Rm），砂的成熟度从后岸到岸面变化适中，这表明运输过程对砂的成熟度影响很小。此外，模态组成表明，卡波苏韦罗海角不妨碍北部的长岸沙运。确实，由风暴波活动驱动的洋流驱使的沙子绕过了这个多岩石的岬角。