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SUMMARY:Closing the gap - fluid transport properties of rocks deforming in
  the ductile regime - Florian Fusseis (University of Edinburgh)
DTSTART:20211110T160000Z
DTEND:20211110T170000Z
UID:TALK161992@talks.cam.ac.uk
CONTACT:Sam Wimpenny
DESCRIPTION:Trans-crustal shear zones are principal fluid conduits in the 
 Earth's crust\, but exactly how fluids migrate in deforming rocks of the m
 iddle and lower crust is poorly understood. This is mostly due to limitati
 ons in our investigative approaches: classical experiments fail to resolve
  the relevant developments in-situ\, and field-based studies are mostly co
 nfined to the post-mortem analyses of exhumed rock specimens.\n\nIt can be
  expected that the evolving fluid transport properties of shear zones are 
 dynamically coupled to the deformation and metamorphism affecting mylonite
 s. Different deformational and metamorphic processes contribute to the for
 mation or modification of porosity in shear zones and thus affect fluid mi
 gration. The time- and space-dependent evolution of permeable porosity con
 trols where fluids can migrate and interact with rocks. Understanding a dy
 namically evolving porosity in deforming and reacting rocks is thus import
 ant in tectonics\, but also in applications such as geothermal energy harv
 esting\, nuclear waste storage\, CO2 storage\, hydrothermal ore forming pr
 ocesses and hydrocarbon extraction.\n\nX-ray µCT allows us to overcome th
 e limitations of classical approaches and study porosity and fluid migrati
 on in deforming rocks in-situ. In this presentation I will summarise some 
 of our studies that use 3- and 4-dimensional µ-tomographic data to charac
 terise previously overlooked\, or poorly characterised processes. These pr
 ocesses directly influence the transport properties of\, and fluid migrati
 on in ductilely deforming rocks.
LOCATION:ONLINE - Details to be sent by email
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