应王锦团副研究员邀请， 罗马萨皮恩扎大学Vincenzo Stagno 教授将于9月16日（下周二）访问我所并在标本楼503会议室做学术报告，欢迎大家参加并积极讨论！

        报告题目：Mantle redox heterogeneities revealed by mineral inclusions in (sub)lithospheric diamonds and laboratory HP-T experiments

        报 告 人：Vincenzo Stagno 教授
        报告时间：9月16日（下周二）下午15:00

        报告地点：标本楼503会议室        

        腾讯会议：664-839-667（同步进行线上报告）

       报告人简介：       

      Professor Vincenzo Stagno (Sapienza University of Rome) integrates high pressure experiments and natural samples to investigate the behaviors or carbon in deep Earth and the redox conditions of the Earth’s mantle. His research activity has been devoted to: a) calibration of oxybarometers relevant for the stability of elemental carbon (graphite/diamond) and carbonate within peridotite and eclogite rocks; b) origin of CO2-rich magmas in the mantle and related rocks (carbonatites, carbonate-silicate magmas, kimberlites) and their rheological properties; c) the stability of carbides, diamonds and carbonates in the lower/upper mantle as function of P-T-fO2; d) the Fe oxidation state of mantle minerals and diamond inclusions as redox marker. He has authored more than 60 peer-reviewed papers in leading journals such as Nature, Nature Comm., and Journal of Petrology. 

        报告摘要：    

      The chemical composition of the terrestrial atmosphere has changed through time as result of the composition of the gaseous species released by volcanic eruptions accompanied by the emergence of life that, in turn, reflected the gradual oxygenation of the interior of Earth. Such O2 increase in the interior of Earth has been often referred to 1) late-stage impact of oxidized meteoritic bodies, 2) core-mantle differentiation associated with Fe disproportionation, and 3) early subduction processes transporting oxidized elements from the surface to the interior. Mineral inclusions in (sub)lithospheric diamonds keep memory of the primitive mantle redox state much more efficiently than the mantle rocks and, surprisingly, provide evidence of coexistence with volatile-bearing magmas in contrast to thermodynamic predictions that, coupled with experimental studies, open new scenarios on the redox state of Earth’s mantle.