Rheological studies of MORB, San Carlos olivine and CF phase in transition zone and lower mantle
type: Dataset
description: This dataset contains results of experiments to measure the relative strength of mid-ocean ridge basalt (MORB) and hartzbergite at pressures of the transition zone and lower mantle, along with the absolute rheology of the CF (calcium ferrite-type) phase under lower mantle conditions. Deformation experiments were conducted using: - The D-T Cup Press at University College London (UCL) - The D-111 Press at the Institute for Planetary Materials, Okayama University, Misasa, Japan; - The D-111 module of the SPEED Mk-II at SPring-8 synchrotron radiation facility, Japan The dataset includes: - Scanning electron microscope (SEM) images of recovered samples; - 2-D diffraction images of recovered samples to determine lattice preferred orientations (LPOs); - 2-D diffraction data collected at regular intervals during in-situ deformation experiments to determine differential stress in samples - Radiographic images of samples collected at regular intervals during in-situ deformation experiments to determine the length change of samples. These data provide measurements of rheology of transition-zone and lower-mantle rocks and minerals, supporting investigations of flow in the mantle transition zone and mechanisms of MORB segregation and ponding around the 660 km seismic discontinuity.
keyword: Earth mantle
keyword: NERC_DDC
keyword: Rheology
keyword: Subduction
keyword: Viscosity
issued: 2026-08-06T20:36:11.633006
modified: 2026-08-13T21:36:50.555811

British Geological Survey (BGS)
type: Organization

Data
type: Distribution
description: Resource locator
access URL: https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192905
issued: 2026-08-13T21:36:50.594580
modified: 2026-08-13T21:36:50.561642

Citation Information - Digital Object Identifier (DOI)
type: Distribution
description: Dobson, D., Xu, F. (2026). Rheological studies of MORB, San Carlos olivine and CF phase in transition zone and lower mantle. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/b6c5eacf-7b33-4300-b3fd-f39f3b5373da
access URL: https://doi.org/10.5285/b6c5eacf-7b33-4300-b3fd-f39f3b5373da
issued: 2026-08-13T21:36:50.594582
modified: 2026-08-13T21:36:50.561710