A local lithospheric structure model for Vietnam derived from a high-resolution gravimetric geoid

Abstract High-resolution Moho and lithosphere–asthenosphere boundary depth models for Vietnam its surrounding areas are determined based on a recently released geoid model constructed from surface satellite gravity data (GEOID_LSC_C model) 3?? resolution topography (mixed SRTM model). A linear density gradient the crust temperature-dependent lithospheric mantle were used to determine structure under assumption of local isostasy. In first step, impact correcting elevation sedimentary basins estimate has been evaluated using CRUST1.0 model. Results obtained test area where seismic available, which demonstrated that effect should be considered before inversion process. The height elevation-corrected layer filtered remove signals originating below lithosphere. resulting computed at 1? against as well global available in study region. These comparisons indicate consistency our estimation with within 1.5 km standard deviation whole Vietnam. This new region represents significant improvement over GEMMA, have deviations 3.2 3.3 km, respectively, when compared data. Even if detailed geological interpretation results is out scope this paper, joint analysis high-resolution Bouguer anomaly finally discussed terms main patterns high contribute better constrain tectonic geodynamic processes differences visible northeast southwest sides Red River Fault Zone confirmed may between two continental blocks: South China Indochina blocks. However, no remarkable results. suggests developed remained crustal fault.