Origin of ammoniated phyllosilicates on dwarf planet Ceres and asteroids.

ABSTRACT: The surface mineralogy of dwarf planet Ceres is rich in ammonium (NH₄⁺) bearing phyllosilicates. However, the origin and formation mechanisms of ammoniated phyllosilicates on Ceres's surface are still elusive. Here we report on laboratory simulation experiments under astrophysical conditions mimicking Ceres' physical and chemical environments with the goal to better understand the source of ammoniated minerals on Ceres' surface. We observe that thermally driven proton exchange reactions between phyllosilicates and ammonia (NH₃) could trigger at low temperature leading to the genesis of ammoniated-minerals. Our study revealed the thermal (300 K) and radiation stability of ammoniated-phyllosilicates over a timescale of at least some 500 million years. The pre

SUBMITTER: Singh SK 

PROVIDER: S-EPMC8113531 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature