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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Three-dimensional thermal modeling of the California upper mantle: a slab window vs. stalled slab
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Three-dimensional thermal modeling of the California upper mantle: a slab window vs. stalled slab

机译：加利福尼亚上地幔的三维热模拟：平板窗与失速平板

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In order to gain a better understanding of the behaviour of microplates after their subduction, we studied two end-member scenarios for the post-subduction history of two offshore California microplates. In the first scenario, Monterey and Arguello microplate remnants are present today below the North America Plate, while in the second scenario subducted microplate remnants are absent. 3-D numerical modeling of the thermal evolution implied by these scenarios results in two different present-day thermal structures of the central and southern California upper mantle. By comparing the model-predicted surface heat flow values and seismic velocities to heat flow data and tomography, we find that we cannot discriminate between the two scenarios as they both are consistent with the data. This result means that the present-day upper mantle temperature field is relatively insensitive to the assume microplate scenarios. A slabless window is not needed for the generation of partial melt either, which is consistent with earlier 2-D stu
机译：为了更好地了解微孔板在俯冲后的行为，我们研究了两个末端加利福尼亚情景，以了解两个加利福尼亚海上微孔板的俯冲后历史。在第一种情况下，今天在北美板块以下存在蒙特雷和Arguello微孔板残留物，而在第二种情况下，不存在俯冲的微孔板残留物。这些场景隐含的热演化的3-D数值模型导致了加利福尼亚中部和南部上地幔的两种不同的当今热结构。通过将模型预测的表面热流值和地震速度与热流数据和层析成像进行比较，我们发现我们无法区分这两种情况，因为它们都与数据一致。该结果意味着当今的上地幔温度场对假设的微孔板情况相对不敏感。也不需要无平板的窗口来生成部分熔体，这与早期的2D stu一致

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