Earth Sciences

Earth Sciences

• Home
• Contact
• News
• Study Here
• Research
  • Research Areas
  • Research Groups and Affiliated Institutes
  • Facilities
    • All Facilities
      • Diamond Anvil Cell
      • Instrumentation Development Workshop
      • Mantle Rheology
      • Rock Preparation
      • Scanning Electron Microscope
      • X-Ray Diffraction Laboratory
      • Environmental Sedimentology Facility
      • The Micropalaeontology Laboratories
      • Wolfson Laboratory for Environmental Geochemistry
      • Inductively Coupled Plasma Mass Spectrometry Lab
      • Sediment Deformation
      • Rock Mechanics
      • Fracture Mechanics
      • Haskel
      • Ice Physics
      • MinPhysics
      • RockFluids
      • RockPhysics
      • Geochronology
      • Fluid Dynamics
      • Geophys Equipment
  • PhD Topics
  • Publications
  • Seminars
• People
• Facilities
• Impact
• About
• My Department

Fracture Mechanics

• Location: Room OB11, Basement, Kathleen Lonsdale Building
• Telephone Extension: 30149
• Laboratory Manager: Professor Peter Sammonds

---

The mechanical properties of volcanic rocks at high temperatures and low pressures are key properties in the understanding of a range of volcanological problems, in particular lava flow dynamics. The measurement of these properties on extrusive volcanic samples under the appropriate pressure and temperature conditions has a direct application in the assessment of volcanic hazards.

Research Equipment Includes:

High-temperature (700ºC) fracture mechanics apparatus using water/brine or gas as a pore fluid medium (up to 70 MPa) utilizing short rod specimen. This apparatus is used to simulate conditions in a volcanic ediface and lava flows.

A development of the above fracture mechanics apparatus has been to modify it's design to a triaxial deformation cell to obtain mechanical strength data on rock samples at temperatures up to 1000‡C and pressures up to 30 MPa. Significantly, the cell uses large cylindrical rock specimens, 25 mm diameter by 75 mm long, never previously employed in such a high-temperature apparatus. The large specimen size is necessary to test volcanic rocks with their large crystals and vesicles.

Its operating temperature and pressure range encompasses the conditions of an advancing flow from the vent to the front, as well as the conditions of the volcanic rocks hosting magma at equivalent depths of up to 2 km.

---