期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2008
卷号：3
出版社：IOP Publishing
摘要：A variety of source mechanisms have been proposed to account for observed
caldera deformation. Here we present a systematic set of new results from
numerical forward modelling using a Finite Element Method. which provides a link
between measured ground deformation and the inaccessible deformation source. We
simulate surface displacements due to pressure changes in a shallow oblate
reservoir overlain by host rock with variable mechanical properties. We find
that the amplitude and wavelength of resultant ground deformation is dependent
on the distribution of mechanically stiff and soft lithologies and their
relative distribution above a reservoir. In addition, we note an influence of
layering on the critical ratio of horizontal over vertical displacements, a
criterion employed to discriminate between different finite source geometries.
