Title

M. D. Sidorov, R. M. Novakov

Density model of the junction zone of the Kamchatka and Aleutian island arcs

Three-dimensional density model of crustal block in conjunction zone of Kamchatka and Aleutian island arcs was made. The technology of model development was described. Deep density irregularities and their connection with surface structures were characterized: Havyvensky buried high, Ukolkinskaya cavity and Tyushevsky downwarping. Model gives the possibility to forecast structures extension to the deep, determine their size and form, discover hidden geological formations inapproachable for research from the surface. Probable position of allochthon root of Krotonsky hyperbasite massive and possible position of analogous non-eroded intrusions were determined.
Key words: density, model, depression, elevating, island-arc.