新聞動(dòng)態(tài)2025.09.16?Mantle redox heterogeneities revealed by mineral inclusions in (sub)lithospheric diamonds and laboratory HP-T experiments
? ? ???應(yīng)王錦團(tuán)副研究員邀請(qǐng)， 羅馬薩皮恩扎大學(xué)Vincenzo Stagno 教授將于9月16日（下周二）訪問我所并在標(biāo)本樓503會(huì)議室做學(xué)術(shù)報(bào)告，歡迎大家參加并積極討論！
? ? ? ? 報(bào)告題目：Mantle redox heterogeneities revealed by mineral inclusions in (sub)lithospheric diamonds and laboratory HP-T experiments
? ? ? ??報(bào) 告 人：Vincenzo Stagno 教授
? ? ? ? 報(bào)告時(shí)間：9月16日（下周二）下午15:00
? ? ? ? 報(bào)告地點(diǎn)：標(biāo)本樓503會(huì)議室? ? ? ??
? ? ? ? 騰訊會(huì)議：664-839-667（同步進(jìn)行線上報(bào)告）
? ? ? ?報(bào)告人簡(jiǎn)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.?
? ? ?? ?報(bào)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.?
