Article : Topography of the Moho and earth crust structure beneath the East Vietnam Sea from 3D inversion of gravity field data
Authors : Vitkulin, A. V.Institute of Volcanology and Seismology, Far East Branch, Russian Academy of Sciences, Petropavlovsk-Kamchatski, Russia, firstname.lastname@example.org, Semenov, V. Y.Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland, email@example.com, Majewski, E.Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland, firstname.lastname@example.org, Nenovski, P.National Institute for Geophysics, Geodesy and Geography, Sofia, Bulgaria, email@example.com, Sayil, N.Karadeniz Technical University, Engineering Faculty, Department of Geophysics, Trabzon, Turkey, firstname.lastname@example.org, Nguyen, N. T.Institute of Marine Geology and Geophysics, Vietnam Academy of Science and Technology, Hanoi, Vietnam, email@example.com,
Abstract : The Moho depth, crustal thickness and fault systems of the East Vietnam Sea (EVS) are determined by 3D interpretation of satellite grav- ity. The Moho depth is calculated by 3D Parker inversion from residual gravity anomaly that is obtained by removing the gravity effects of sea- floor and Pre-Cenozoic sediment basement topographies from the free air anomaly. The 3D inversion solution is constrained by power density spectrum of gravity an omaly and seismic data. The calculated Moho depths in the EVS vary from 30-31 km near the coast to 9 km in the Central Basin. A map of the lithosphere extension factor in the Cenozoic is constructed from Moho and Pre-Cenozoic sediment basement depths. The fault systems constructed by the maximum horizontal gradient approach include NE-SW, NW-SE, and N-S oriented faults. Based on the interpretation results, the EVS is sub-divided into five structural zones which demonstrated the different characteristics of the crustal structure.
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Qute : Vitkulin, A. V. ,Semenov, V. Y. ,Majewski, E. ,Nenovski, P. ,Sayil, N. ,Nguyen, N. T. ,Nguyen, N. T. , Topography of the Moho and earth crust structure beneath the East Vietnam Sea from 3D inversion of gravity field data. Acta Geophysica Vol. 61, no. 2/2013