Copper isotope ratios across a hydrothermal chimney wall from the Roman Ruins site in the PACMANUS vent field in the Manus Basin

A hydrothermal chimney wall has been prepared into a thick section to evaluate the evolution of copper isotope accross the wall (from the inside where the wall is in contact with a hot hydrothermal fluid), to the outside (where the wall is in contact with cold seawater). On the thick section, powders have been collected using microdrilling along 2 transects (A and B). The powders and the hydrothermal fluid venting through this chimney have been analyzed for element concentrations and copper isotope ratios.

为评估铜同位素在烟囱壁（从内部与热液流体接触处）至外部（壁面与冷海水接触处）的演化过程，已将烟囱壁制备成厚切片。在厚切片上，沿两条剖面（A剖面和B剖面）通过微钻取粉末样品。对所采集的粉末以及通过该烟囱排放的热液流体进行了元素浓度和铜同位素比值的分析。