Abstract The study aims to fill the gap of knowledge in the literature concerning submarine hydrothermal activity on the eastern part of Hellenic Volcanic Arc. Hydrothermal fluids were collected by scuba diving in active shallow hydrothermal venting areas on Kos Island in the Aegean Sea in East Mediterranean. Analysis was carried out in suspended particles for Fe, Mn, Cu, Pb, Cd, Ca, Ba, Sr, Li, Al and Si. During sampling, gas and water flux was measured and gas/water ratios were estimated. The data presented significant time and spatial variability. The gas flux values in Kephalos Bay varied from 2 to 126 L/h and water flux varied from 60 to 122 L/h. In Bros Thermi the gas flux values varied from 4.5 to 60 L/h and the water flux was found to be from 16.5 to 96 L/h. The suspended particulate matter (SPM) flux varied from 0.93 to 8.64 mg/L and between 0.21 and 20.94 mg/L respectively at two sites studied. Metal/Al ratios also varied significantly within a short distance. The pH of hydrothermal waters was from 5.50 to 5.95 in Kephalos Bay and from 6.09 to 6.53 in Bros Thermi suggesting either different mixing of fluids with seawater deeper in the substrate or perhaps that gases CO 2 and H 2 S control pH values. The main scope of this research is to evaluate the fluxes of gas and water and study the main particulate geochemistry of hydrothermal venting fluids. Hydrothermal particles from the submarine vents studied were dominated by Fe, Ca, Si and Al and strongly enriched in Mn, Cu, Pb and Ba. Based on Metal/Al ratios, it is suggested that there are two distinct hydrothermal reservoirs in Kos. The chemistry of the particles emitted from seeps strongly influence both the marine sediment geochemistry and element distribution locally on the sea bottom while subjected to further transportation, hydrothermal particulates could also affect a much greater region.

中文翻译：

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爱琴海东地中海科斯岛海底喷口的热液流体粒子地球化学

摘要 本研究旨在填补希腊火山弧东部海底热液活动文献中的知识空白。通过在东地中海爱琴海科斯岛上活跃的浅层热液喷口区进行水肺潜水收集热液流体。在悬浮颗粒中对 Fe、Mn、Cu、Pb、Cd、Ca、Ba、Sr、Li、Al 和 Si 进行分析。在取样过程中，测量了气体和水的通量并估计了气体/水的比率。数据呈现出显着的时间和空间变异性。Kephalos Bay 的气体通量值从 2 到 126 L/h 不等，而水通量值从 60 到 122 L/h 不等。在 Bros Thermi 中，气体通量值在 4.5 到 60 L/h 之间变化，而水通量值在 16.5 到 96 L/h 之间变化。悬浮颗粒物 (SPM) 通量从 0.93 到 8 不等。在研究的两个地点分别为 64 mg/L 和 0.21 至 20.94 mg/L。金属/铝比率在短距离内也有显着变化。Kephalos Bay 的热液 pH 值从 5.50 到 5.95，Bros Thermi 的从 6.09 到 6.53，这表明流体与海底深处海水的不同混合，或者气体 CO 2 和 H 2 S 可能控制 pH 值。本研究的主要范围是评价气水通量，研究热液喷出流体的主要颗粒地球化学。研究的海底喷口的热液颗粒以 Fe、Ca、Si 和 Al 为主，富含 Mn、Cu、Pb 和 Ba。根据金属/铝比率，建议在科斯有两个不同的热液储层。