Experimental Stability of Hydrous Phases in Subduction Zones

British Geological Survey research project investigates the pressure-temperature stability of hydrous phases in ultramafic compositions. The study aims to determine conditions for H2O release in subduction zones through reversed phase-equilibrium experiments in systems like MgO-SiO2-H2O. It seeks to extract thermodynamic data and constrain the equation of state of H2O at high pressures.

Use Cases

• Analyze phase-equilibrium experimental results from the MgO-SiO2-H2O system to model dehydration reactions.
• Use in situ volume measurements of hydrous phases to constrain thermodynamic equations of state.
• Apply thermodynamic data from solid-solid reactions to model H2O storage and release in subduction zone conditions.
• Integrate p-t stability data for hydrous phases into geophysical models of subduction zone processes.

Strengths

• Research conducted by the authoritative British Geological Survey (BGS).
• Focus on experimentally derived thermodynamic data for hydrous phases.
• Aims to provide constraints on the equation of state of H2O at high pressures relevant to subduction zones.

Limitations

• Dataset details such as row count, column structure, and file formats are unknown.
• The input describes a project plan, not a finalized, available dataset for direct analysis.
• Potential limitation in direct applicability if the final experimental data is not publicly shared.

Provenance

Source

British Geological Survey (BGS)

Collection Method

Reversed phase-equilibrium experiments and in situ volume measurements using synchrotron radiation.

Time Range

null

Freshness

Project metadata last updated March 2026.

Geography

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