| Summary: | Gravity and topographic/bathymetric data are
used for gravimetric modelling of Moho discontinuity by
hydrostatic or flexural theories of the isostasy. Here, two
hydrostatic models, based on the Vening Meinesz-Moritz
(VMM) principle, and two based on the loading theories
and flexural isostasy are compared over Tibet Plateau. It is
shown that theMoho models generated based on theVMM
theory and flexural isostasy have very good agreements if
the mean compensation depth and the mean elastic thickness
are selected properly. However, the model computed
based on the flexural isostasy is smoother. A more rigorous
flexural model, which considers the membrane stress and
curvature of the lithosphere, is used to model the Moho
surface over the study area. It is shown that the difference
between the Moho models, derived by considering
and ignoring these parameters, is not significant. By combination
of the flexural and VMM hydrostatic models new
mathematical formulae for crustal gravity anomalies are
provided and it is shown that the crustal gravity anomalies
produced by them are also equivalent.
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