Mineral physics of icy planetary bodies

Lead Research Organisation: University College London
Department Name: Earth Sciences

Abstract

The outer solar system contains a large number of ice-rich objects, ranging in size from a few km to a few thousand km across; the latter includes the Jovian satellites Ganymede and Callisto and the Saturnian moon Titan, each of which are larger than the planet Mercury. It has been recognised for many decades that the 'ice' portion of these large icy bodies will have inherited additional volatile and non-volatile constituents from their 'dirty snowball' accretionary precursors and will also have undergone substantial hydrothermal processing during core differentiation. The result of this is that the 'ice' layers will contain a range of hydrate compounds as 'rock-forming minerals'. However, it is only in the last 20 years that experimental and computational mineral physics methods have provided the tools to determine the behaviour of these materials under the relevant conditions of pressure and temperature (0 < P < 5 GPa, 100 < T < 400 K). Such work is essential to ensure an accurate basis for structural and evolutionary modelling, which in turn provides the means of interpreting observational data from remote and in situ planetary exploration.The aim of this studentship is to address long-standing problems in the structure and properties of high-pressure hydrate minerals, synthesising and recovering high-P polymorphs or dissociation products of materials such as meridianiite (MgSO4.11H2O), mirabilite (Na2SO4.10H2O), ammonia dihydrate (NH3.2H2O) and various sulfuric acid hydrates (H2SO4.nH2O).

Publications

10 25 50

Studentship Projects

Project Reference Relationship Related To Start End Student Name
ST/R50516X/1 01/10/2017 30/09/2021
1924469 Studentship ST/R50516X/1 25/09/2017 30/09/2021 Geoffrey Baron
 
Description Public Talks 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Public/other audiences
Results and Impact Short talks at the science museum in London on topics related to my research given to the general public.
Year(s) Of Engagement Activity 2019
 
Description School Visit 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Schools
Results and Impact General interest background to my research activities as part of a discussion about science.
Year(s) Of Engagement Activity 2019,2020