The peculiarities of the junction between the Kuril–Kamchatka and Aleutian island arcs are studied using different techniques and experimental data. The models of medium structure that were obtained by using surface wave tomography and studies of S-wave anisotropy in the asthenosphere beneath the subduction plate detected an ascending asthenospheric flow of hot material and fluids along the northern boundary of the lithospheric plate. The presence of the ascending asthenospheric flow in the junction zone has been recently confirmed by detailed body-wave seismic tomography. Additional feeding of the Klyuchevskoi volcanic group from the asthenospheric flow explains the great difference in the eruptive activity of these volcanoes in comparison to other volcanoes located in the Eastern volcanic belt of Kamchatka. Comparative study of Quaternary volcanoes lying in the Eastern volcanic belt has revealed a strongly pronounced decreasing productivity from north to the south, i.e., with distance from the end of the subduction plate. This reduction is likely related to a depletion in the invasion of magmatic melts along the subduction plate from the asthenospheric flow in the junction of the Kuril–Kamchatka and Aleutian island arcs.

中文翻译：

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千岛-堪察加半岛和阿留申岛弧交界处的俯冲特征

使用不同的技术和实验数据研究了千岛-堪察加半岛和阿留申岛弧之间连接点的特性。通过使用表面波层析成像和俯冲板块下方软流圈中的 S 波各向异性研究获得的介质结构模型检测到沿岩石圈板块北边界的热物质和流体上升的软流圈流动。最近通过详细的体波地震层析成像证实了在交界区存在上升的软流圈流。来自软流圈流的 Klyuchevskoi 火山群的额外补给解释了这些火山与位于堪察加东部火山带的其他火山相比的巨大喷发活动差异。对位于东部火山带的第四纪火山的比较研究表明，从北到南，即随着距俯冲板块末端的距离，生产力明显下降。这种减少可能与从千岛-堪察加半岛和阿留申岛弧交界处的软流圈流中沿俯冲板块侵入的岩浆熔体消耗减少有关。