Overview
- Rice University summarized the peer‑reviewed findings Tuesday, following the Feb. 26 publication in Geochimica et Cosmochimica Acta.
- Using the chemically reduced Indarch meteorite as a stand‑in for Mercury, researchers mixed a model melt and ran high‑pressure, high‑temperature experiments to mimic the planet’s interior.
- Because Mercury is iron‑poor, sulfur bonds with magnesium and calcium and takes oxygen’s place in the silicate framework that normally holds rock structures together.
- This sulfur substitution weakens the silicate network and lowers the temperature at which the melt begins to crystallize, so Mercury‑like magmas can stay liquid at cooler conditions than on Earth.
- The team says this mechanism explains Mercury’s unusual surface chemistry and calls for planet‑specific models to interpret mission data, with the work supported by NASA grants.