Evidence of high velocity anomalies in the transition zone associated with Southern Kurile Subduction Zone
Evidence of high velocity anomalies in the transition zone associated with Southern Kurile Subduction Zone
复制标题
DOI：
10.1029/95gl03314
复制
发表时间：
1995-12
影响因子：
5.2
通讯作者：
F. Tajima;S. Grand
中科院分区：
文献类型：
--
作者：
F. Tajima;S. Grand
我们讨论使用区域宽带波形数据来更好地约束上地幔过渡带结构。然后，我们展示了与南千岛俯冲带相关的过渡带中存在高速异常的证据。三重区域波形模型支持过渡带较深部分（深度超过500公里）存在高速异常，“660”间断面可能凹陷至约690公里深度。我们的结果表明千岛群岛南部的板块有一定程度的扁平化。
We address the use of regional broad-band waveform data to better constrain the upper mantle transition zone structure. We then show evidence of high velocity anomalies in the transition zone associated with the southern Kurile subduction zone. Modeling of the triplicated regional waveforms supports that high velocity anomalies exist in the deeper part of the transition zone (over 500 km in depth), and the “660” discontinuity may be depressed to about 690 km depth. Our results suggest there is some degree of flattening of the slab in the southern Kuriles.