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首页> 外文期刊>Physics of the Earth and Planetary Interiors: A Journal Devoted to Obsevational and Experimerntal Studies of the Chemistry and Physics of Planetary Interiors and Their Theoretical Interpretation >Seismic imaging of the D'' and constraints on the core heat flux
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Seismic imaging of the D'' and constraints on the core heat flux

机译：D''的地震成像和对岩心热通量的限制

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Recent seismic imaging of the deep mantle has revealed lens-shaped layers near the bottom of the mantle. The morphology of this layering has been attributed to the crossing of the post-perovskite phase boundary by the local geotherm. We have developed a technique for quantifying the relationships between the depths of the double crossings of the post-perovskite transition developed in 3D spherical mantle convection, as a means for testing the viability for using the Clapeyron slope of the phase transition to put bounds on the heat flux from the core. We have argued from the probability distribution of the local heat flow at the core-mantle boundary that there are intrinsic problems in using error function from half-space cooling curves for constraining the core heat flux because of the non-Gaussian shape of the probability distribution of the core heat flow in realistic 3D convection models. In order to constrain better the core heat flux with the above arguments, we need to know much better the mantle viscosity stratification and the pressure dependence of thermal conductivity in the deep mantle. Only then can we put together enough constraints to discuss with greater certainty about the core heat flux.
机译：最近对深地幔的地震成像显示出在地幔底部附近的透镜状层。该分层的形态已归因于钙钛矿后期相界被当地地热的穿越。我们已经开发出一种技术，用于量化在3D球形地幔对流中开发的钙钛矿过渡期的两次穿越深度之间的关系，以此作为测试使用相变的Clapeyron坡度将界线置于边界上的可行性的方法。核心的热通量。从核心-地幔边界处局部热流的概率分布中我们得出结论，由于概率分布的非高斯形状，使用半空间冷却曲线的误差函数约束核心热通量存在固有问题。逼真的3D对流模型中核心热流的变化。为了更好地利用上述论证来约束岩心的热通量，我们需要更好地了解地幔粘度分层以及深地幔中导热系数的压力依赖性。只有这样，我们才能放出足够的约束条件，才能更确定地讨论堆芯热通量。

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