Abstract The 2018 eruption of Kīlauea was associated with massive input of molten lava into the coastal ocean, which altered seawater chemistry and increased phytoplankton production. In seawater plumes advected away from the site of lava entry, we observed elevated concentrations of over a dozen metals relative to background seawater and unique isotopic compositions of Fe, Cu, Ni, Cd and Zn. The δ56Fe of iron released from lava was lower than basaltic, riverine and coastal iron from Hawaiʻi, but similar to observations of other high-temperature hydrothermal vent fluids. However, rapid precipitation led to only modest enrichments in dissolved iron (

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2018 年基拉韦厄火山喷发期间熔岩-海水相互作用的金属同位素特征

摘要 2018 年基拉韦厄火山喷发与大量熔岩流入沿海海洋有关，这改变了海水化学并增加了浮游植物的产量。在远离熔岩入口的海水羽流中，我们观察到相对于背景海水和铁、铜、镍、镉和锌的独特同位素组成，十几种金属的浓度升高。熔岩释放的铁的δ56Fe低于夏威夷的玄武岩、河流和沿海铁，但与其他高温热液喷口流体的观察结果相似。然而，快速沉淀仅导致溶解铁的适度富集（