Output details
13 - Electrical and Electronic Engineering, Metallurgy and Materials
Imperial College London : B - Metallurgy and Materials
Why aqueous alteration in asteroids was isochemical: High porosity not equal high permeability
Fundamental work on fine-grained Chondrite-meteorites revealed water permeabilities six orders of magnitude lower than previously assumed. Mineralogy of ancient pristine meteorites can now be far better explained. The focussed ion beam(FIB) thinning protocols developed ensured no differential thinning during sample preparation, so that the porosity observed is "real" and not an artifact of the sample preparation technique. Results were included at an invited talk on FIB secondary ion mass spectroscopy(SIMS) at SIMS 17 (Toronto 2009). FIB protocols developed are now widely applied on insulating materials such as chalcogenide glass microspheres for optoelectronics, e.g. Kane, Chater and McPhail, J. Microscopy(247)(2)186-195, 2012.
