Gravity field,surface topography,and volcanic complexes of Kamchatka and its junction with the Aleutian arc |
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Authors: | NL Dobretsov AN Vasilevskiy |
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Institution: | Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia |
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Abstract: | The paper deals with interpretation of global digital maps of gravity anomalies and surface topography for the northwestern Pacific and Kamchatka regions. A transformation procedure is suggested to reveal subtle features of surface topography against high elevation contrasts. Gravity data (free-air and Bouguer anomalies) have important implications for the evolution of the circum-Pacific region and the problems of volcanism and geodynamics in subduction zones. The patterns of gravity anomalies and transformed topography interpreted jointly with onshore and offshore geological data can make a basis for tectonic paleoreconstructions of upper crust and lithospheric mantle structures. |
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Keywords: | tectonics geodynamics volcanoplutonic complexes free-air and Bouguer gravity anomalies integrated interpretation Kamchatka Aleutian arc |
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