Estimating the lithospheric flexure of a plate with non-uniform flexural rigidity: a quantitative modelling approach

Abstract Lithospheric deformation is a fundamental process in plate tectonics. It is, therefore, critical to determine how the lithosphere responds geological loads better understand tectonic processes. The can be modelled as flexure of thin, elastic over long-term (> 10 5 yr) timescales. partial differential equation for an orthotropic used indirectly calculate theoretical admittance and coherence, which are then compared against observed coherence invert non-uniform flexural rigidity (or effective thickness, T e ) plate. However, accurately recovering variable lithospheric remains unresolved, classical model may overestimate deflection Here we adopt classic with applied external internal at surface Moho, respectively, assume that compensation material denser than mantle beneath Moho. errors derived mainly from Moho recovery this model. Synthetic modelling performed analyse influence errors. analysis synthetic shows that: (1) error-induced exhibit rippling pattern, pattern broader high regions; (2) occur low regions, applying Airy isostasy theory regions still greatly amplitude; (3) dominated by respectively.