{"ok":true,"nota":{"id":"c7fdb2621eaec734","slug":"mercurio-tiene-azufre-en-su-superficie-aunque-casi-no-tiene-hierro-y-l-c7fdb2","titulo":"Mercurio tiene azufre en su superficie aunque casi no tiene hierro, y los experimentos explican por qué","resumen":"Investigadores recrearon en laboratorio condiciones parecidas a las del interior de Mercurio, a altas temperaturas y presión, para entender cómo se formó su superficie rica en azufre. Observaron que al enfriarse se forman sulfuros de calcio y magnesio que contienen algo de hierro.","fuente":"hal","fuenteNombre":"HAL · Ciencia abierta","color":"#b06000","autor":"Malavergne, Valérie, Cordier, Patrick, Righter, Kevin","url":"https://hal.science/hal-00999438","imagen":"/hoy/portada/c7fdb2621eaec734","tema":"ciencia","subtemas":["mercurio","geologia planetaria","sulfuros","sistema solar","experimentos de laboratorio"],"entidades":["Mercurio","MESSENGER","HAL"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-23T00:00:00.000Z","indexTs":"2026-10-23T12:03:18.527Z","hash":"d22974b56c5091be9da2d33be2e3b4874688481eaf6350e3c6c88810b5c67f54","tsa":{"time":"Oct 23 12:04:20 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"El planeta más chico del sistema solar tiene una superficie con mucho más azufre del que sería esperable, algo que no se ve en los otros planetas rocosos. Esto obliga a revisar cómo se armó Mercurio desde el principio, y muestra que los planetas pueden tener historias muy distintas aunque estén en el mismo sistema. Lo que hoy sabemos sale de un modelo de laboratorio, no de una observación directa del planeta, y eso deja preguntas abiertas que la misión MESSENGER no alcanzó a responder del todo.","quienFirma":"HAL (repositorio abierto de publicaciones científicas francesas)","confianza":"revisado","consulta":null},"sello":{"hash":"d22974b56c5091be9da2d33be2e3b4874688481eaf6350e3c6c88810b5c67f54","sello":"339f220537475fa7e03ca8d00cc64d08e5a7858701e22f70013e3a2ebdf23c56","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6577534,"aleatorio":"c9e07c4a7baaade0e8acc56f64536cbb18d3ad1e3d8c1ae5596009491ca1c705","tiempo":"2026-10-23T12:04:00.000Z"},"nist":{"cadena":2,"pulso":1995961,"salida":"F41B5D0D554B9AA93D86596521336D547B043E4F52A3C280F10F60EAE511ED1743D3E56670D4E53EB431734AC5B1B8CB5DCF96D1DB26F562D058604979415129","tiempo":"2026-10-23T12:03:00.000Z"},"noAntes":"2026-10-23T12:04:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 23 12:04:20 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"How Mercury can be the most reduced terrestrial planet and still store iron in its mantle","descripcion":"Mercury is notorious as the most reduced planet with the highest metal/silicate ratio, yet paradoxically data from the MESSENGER spacecraft show that its iron-poor crust is high in sulfur (up to ∼6 wt%, ∼80× Earth crust abundance) present mainly as Ca-rich sulfides on its surface. These particularities are simply impossible on the other terrestrial planets. In order to understand the role played by sulfur during the formation of Mercury, we investigated the phase relationships in Mercurian analogs of enstatite chondrite-like composition experimentally under conditions relevant to differentiation of Mercury (∼1 GPa and 1300–2000 °C). Our results show that Mg-rich and Ca-rich sulfides, which both contain Fe, crystallize successively from reduced silicate melts upon cooling below 1550 °C. As the iron concentration in the reduced silicates stays very low (≪1 wt%), these sulfides represent ne","pubDate":"2026-10-23","url":"https://hal.science/hal-00999438"},"indexado":"2026-10-23T12:03:18.527Z"}}