Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data
Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data
复制标题
根据地震衰减数据估算日本东北部地幔楔的热结构
DOI：
10.1029/2003gl017185
复制
发表时间：
2003
影响因子：
5.2
通讯作者：
A. Hasegawa
中科院分区：
文献类型：
--
作者：
J. Nakajima;A. Hasegawa
我们通过将橄榄石为主的岩石的实验结果应用于地震衰减数据，估计了日本东北部地幔楔的热结构。在40公里深处，火山前缘和弧后侧的温度分别为1000-1130°C和960-1090°C。我们无法获得地幔楔中温度高于1400°C的区域，这是从岩石学研究中推断的。这可能是由于这些异常区域的局部化。在弧后侧的大部分区域，温度高于橄榄岩的湿固相线温度，表明水溶液的加入对地幔楔中熔体的生成起着重要作用。
We estimated thermal structure in the mantle wedge of NE Japan by applying the experimental results of olivine‐dominated rocks to seismic attenuation data. Obtained temperatures at a 40 km depth are 1000–1130°C and 960–1090°C beneath the volcanic front and the back‐arc side, respectively. We cannot obtain the areas with a temperature higher than 1400°C in the mantle wedge, which have been inferred from petrological studies. This is perhaps due to the localization of such anomalous areas. The obtained temperature is higher than that of the wet solidus of peridotite in the greater part of the back‐arc side, which suggests that the addition of aqueous fluids plays an important role in generating melts in the mantle wedge.