Cenozoic Volcanisms and Mantle Dynamics in Japan

SAKUYAMA Tetsuya

doi:10.5026/jgeography.119.1063

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Other Title

新生代日本列島の火山活動とマントルダイナミクス
新生代日本列島の火山活動とマントルダイナミクス--この10年における進展
シンセイダイニホンレットウノカザンカツドウトマントルダイナミクスコノ 10ネンニオケルシンテン
―この10年における進展―
Progress in the Last 10 Years

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Description

The Japanese Islands have experienced subduction of the old Pacific Plate and the young Philippine Sea Plate, as well as back-arc basin opening, such as at the Kurile basin, Japan Sea, Shikoku basin, and Okinawa trough. This paper summarizes progress in understanding mantle dynamics beneath Japan in the past ∼10 years in terms of igneous petrology and geochemistry, seismology, and numerical simulation. The discussion is separated into four regions: Hokkaido, northeast and central Japan, southwest Japan (Chugoku and Shikoku districts), and Kyushu, from northeast to the southwest. Now that a massive amount of volcanic eruption age data and high-resolution seismic analyses have been accumulated for every region, we can discuss mantle dynamics within mantle wedge and back arc mantle in more detail than in the 20^th century. Constraints related to water content, temperature, and melting process in the mantle from a natural sample are, however, still missing despite the importance of these factors when modeling mantle dynamics.

Journal

Journal of Geography (Chigaku Zasshi)

Journal of Geography (Chigaku Zasshi) 119 (6), 1063-1078, 2010

Tokyo Geographical Society

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