The two-phase modeling of water between liquid iron and silicate melt at 50 and 135 gigapascals (corresponding to 3500 and 4200 kelvin) was performed by using ab initio molecular dynamics implemented in the Vienna Ab Initio Simulation Package.

Data files have .dat extension and can be opened with Notepad or any basic text editor software. Each file contains details of sample name, dimensions (length and diameter). All deformed samples were pre-prepared cylinders of synthetic neighbourite. Each file contains 11 data column as follows: Time (hours); Time (secs); CP (V); Vol (V); Force(V); Temp (V); Disp(V); Euro disp (mm); Furn T (mV); PoreP (mV); Furnace Power where V= Volts, mV= millivolts. The Calibration sheet (specific to the apparatus used) uploaded together with the data files is required to convert V and mV raw data into values of stress, strain, strain rate, confining pressure and temperature.

Knowing the age of diamonds is critical to understanding their formation and likely distribution in the mantle. Re-Os isotope analyses of synergetic sulphide inclusions allows dating of individual diamonds by isochron and model age methods. This method will be applied to a suite of well-characterised Siberian diamond inclusions from several different kimberlite pipes. We will aim to determine the ages of eclogite-suite and periodite-suite diamonds, which may provide clues as to their different modes of origin. Shrimp ii Pb-Pb isotope and S-isotopic measurements will further constrain the age and origin of the sulphides and hence the diamonds. N-aggregation studies on the host diamonds will independently assess mantle residence times. We will examine absolute age differences between cores and rims of diamonds by laser cutting fragments of diamonds with multiple inclusions.

The three-component data are downloaded from CDSN and processed with instrument response removed. The data coverages include sampling in the East Asia, southwest and northwest Pacific.

Input and output files from first-principles calculations to compute the lattice thermal conductivity, elastic properties, and phase stability of various lower mantle minerals. Spreadsheets of processing and final results. Article pre-prints.

This dataset holds the output of all the simulations in the Open Access article - Garel, F., S. Goes, D. R. Davies, J. H. Davies, S. C. Kramer, and C. R. Wilson, Interaction of subducted slabs with the mantle transition-zone: A regime diagram from 2-D thermo-mechanical models with a mobile trench and an overriding plate, Geochem. Geophys. Geosyst., 15, 1739-1765, doi 10.1002/2014GC005257, 2014.

Olivine, the major component of the Earth's upper mantle, is known to contain water in the form of H defects. These defects have a significant effect on the physical and chemical properties of minerals. If we are to correctly interpret seismic data from the upper mantle, and to constrain models of its petrologic and geochemical evolution, then we must have information on the energies and mechanisms of water solubility in olivine, and its effects on physical properties. The aim of this project is to use computer simulation methods to predict the nature of H defects in olivine, their mobility, and their effects on elasticity as a function of pressure, and to use this information to better constrain models of dynamic behaviour of the Earth's upper mantle.

The dataset contains the outputs from 3D spherical incompressible mantle convection models. Included outputs, such as visualisation files (to use with open-source software ParaView), allow to analyse the links between the thermal evolution of the mantle and the preservation of geochemical heterogeneity. The data is linked to the manuscript titled "Geodynamic Controls on Mantle Differentiation and Preservation of Long-Term Geochemical Heterogeneity: Focus on the Primitive Undegassed Mantle”. The dataset gathers outputs to produce the figures of the article and post-processing scripts. It also includes the necessary input files and executables needed to reproduce the geodynamic simulations. More details in the README.md file.

This proposal seeks to test the hypothesis that a mantle hotspot was responsible for generating boninite magmas in the Izu - Bonin - Mariana (IBM) arc during the middle Eocene. Reconstruction of the plate configuration at that time places the nascent IBM arc close to the location of the present Manus Basin, where a high 3He/4He hotspot has been identified through helium isotope data and tomographic imaging. This project will deliver: 3He/4He data for middle Eocene boninites to resolve the hotspot-present or hotspot-absent models for initiation of the IBM arc. Pb and O isotope ratios and U and Th concentration data to aid in constraining subduction and crustal contamination in the petrogenesis of these rocks. A framework for investigating Archean tectonics and volcanic massive sulphide deposits.

Included video files are visualisations of the temporal evolution of the following 3D spherical mantle convection models: 05_depltd, 03_depltd, 07_depltd, 1_22_visc, 3_22_visc, no_lid_visc, 10_lid_visc, lT_init, hT_init Each video file shows the temporal evolution of thermal anomalies (compared to layer average) and of Primitive Particle Concentration (PPC, i.e. the fraction of primitive undegassed particles to the total number of paticles owned by each grid node). Video files can be opened using open-source multimedia softwares such as VLC or QuickTime Player. These files are supplementary video files for manuscript titled "Geodynamic Controls on Mantle Differentiation and Preservation of Long-Term Geochemical Heterogeneity: Focus on the Primitive Undegassed Mantle”.