Subduction of an Oceanic Plateau Across Southcentral Alaska: Scattered‐Wave Imaging
Subduction of an Oceanic Plateau Across Southcentral Alaska: Scattered‐Wave Imaging
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DOI：
10.1029/2021jb022697
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
M. Mann;G. Abers;Kiara A. Daly;D. Christensen
中科院分区：
文献类型：
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作者：
M. Mann;G. Abers;Kiara A. Daly;D. Christensen
一个海洋高原，雅库特地体，已经进入了横跨阿拉斯加中南部的俯冲系统。它的下倾命运及其与上覆火山活动的关系仍在争论中。来自Wrangell火山活动和岩石圈命运（WVLF）临时实验的宽带地震仪部署在45公里处，约146°W。CCP叠加还揭示了在雅库特逆冲地壳顶部沿走向延伸约450公里的连续薄低速层，所有深度<35公里。均匀的低速逆冲带通过多个断裂带段显示出一致的性质，表明低速通道通常与俯冲巨型逆冲相对应。
An oceanic plateau, the Yakutat terrane, has entered the subduction system across southcentral Alaska. Its down‐dip fate and relationship to overlying volcanism is still debated. Broadband seismometers from the Wrangell Volcanism and Lithospheric Fate (WVLF) temporary experiment were deployed with 45 km, around 146°W. CCP stacking also reveals a continuous thin low‐velocity layer atop the underthrust Yakutat crust for >450 km along strike, at all depths <35 km. The uniform low‐velocity thrust zone indicates consistent properties through multiple rupture‐zone segments, showing that low‐velocity channels generally correspond with subduction megathrusts.