Institute of Geophysics and Tectonics (IGT)

High Temperature Geochemistry

The High Temperature Geochemistry Group studies the role of water and other fluids in the Earth’s crust and mantle, where they have a major impact on both physical and chemical processes. We have close links with the Volcanology Group and with the low-T geochemists in ESSI.

Our current research projects reflect our interest in these themes:

(i) Water-rock interactions at both mid-ocean ridges and subduction zones: how does water circulation modify rock compositions and affect how they deform? What continuity is there between arc magmatic volatiles and sea floor systems?

(ii) High pressure metamorphism associated with subduction and collision.

(iii)  Geochemistry of ore fluids: are unusual metal concentrations needed to form ore bodies and why do they precipitate?

(iv) Retrograde reactions in the mid-to lower crust: how does water drive metamorphic reactions and how do they affect the strength of the crust?

(v) Mineral fluid interactions in aquifers and the effects of CO2 injection on rock properties.

The School has excellent facilities to support this work: Triton Thermal Ionisation Mass Spectrometer, Agilent ICP-MS with Geolas Excimer laser ablation system as well as new SEM and Microprobe.

High resolution (ToF-SIMS elemental map of a unique veined serpentinite rock from ODP Leg 195 in the Mariana subduction zone.

High resolution (ToF-SIMS elemental map of a unique veined serpentinite rock from ODP Leg 195 in the Mariana subduction zone.

RV JOIDES "Resolution" in the Azores.

RV JOIDES "Resolution" in the Azores.