Constraints on the three-dimensional thermal structure of the lower crust in the Japanese Islands
Constraints on the three-dimensional thermal structure of the lower crust in the Japanese Islands
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DOI：
10.5047/eps.2013.01.005
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
I. Cho;Y. Kuwahara
中科院分区：
文献类型：
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作者：
I. Cho;Y. Kuwahara
我们提出了一种方法来模拟一个三维的热结构，特别侧重于下地壳。我们的方法可以在没有热流数据的情况下进行高分辨率建模，但可以使用地壳中的地震震源数据和上地幔中的地震衰减数据。在我们的方法中，孕震层底部的温度是在假设底部深度对应于脆-韧性过渡带的情况下估计的。其次，利用地幔的地震衰减数据和从地幔捕虏体推断的几个点的温度数据，估计莫霍面下的温度。最后，两个深度之间的温度进行线性插值。试图建立一个实际的模型，日本群岛也进行了说明。
We propose a method for modeling a three-dimensional thermal structure with a particular focus on the lower crust. Our method enables high-resolution modeling without heat flow data, but with earthquake hypocenter data in the crust and seismic attenuation data in the upper mantle. In our method, the temperature at the bottom of the seismogenic layer is estimated under the assumption that the bottom depth corresponds to a brittle-ductile transition zone. Next, the temperature beneath the Moho discontinuity is estimated using seismic attenuation data of the mantle and a few point temperature data inferred from mantle xenoliths. Finally, the temperatures between the two depths are linearly interpolated. Attempts to construct an actual model for the Japanese Islands are also described.