Geochemistry of hydrothermal fluids at the Lucky Strike Hydrothermal Field data from the EMSO-Azores observatory, 2023

high temperature hydrothermal fluids are collected during the momarsat 2023 cruise by gas-tight fluid sampler manipulated and triggered by the hydraulic arm of the submarine vehicle (rov victor). several hydrothermal vents are sampled, namely : aisics, eiffel tower, montsegur, montserrat, isabel, sintra, y3, white castle, cypress, south crystal, capelinhos.several chemical analyses are performed aboard the research vessel: such as salinity and d20/20 by refractometer, conductivity, salinity and total dissolved solid (tds) by electrode (standard solution at 1413 µs/cm), ph and eh by electrode (ph standard 4.01 and 7; eh standard solution at -220mv), iron concentration by photometer (up to 5 ppm), h2s and total s concentrations measured by electrode (aquams, amperometric method) at measured ph value.regional node: emso-azoresvent field : lucky strikelatitude : 37º17’nlongitude : 32º16’w1600 – 1750 m depth

在 Momarsat 2023 考察巡航期间，通过潜水器（ROV Victor）的液压臂操控并触发的气密式流体采样器，收集了高温海底热液。对多个海底热液喷口进行了采样，包括：Aisics、埃菲尔铁塔、Montsegur、Montserrat、Isabel、Sintra、Y3、白城堡、Cypress、南水晶、Capelinhos。在研究船上进行了多项化学分析：如使用折射仪进行的盐度及d20/20测定，电导率、盐度及总溶解固体（TDS）的测定（1413 µs/cm标准溶液），pH值及氧化还原电位（EH）的测定（pH标准值为4.01和7；EH标准溶液为-220mv），铁浓度的测定（光度计，高达5 ppm），在测量pH值时，使用电极法（Aquams，电化学法）测定H2S及总硫浓度。区域节点：EMSO-亚速尔，热液场：幸运打击，纬度：37º17'n，经度：32º16'w，深度：1600 – 1750米。