金星的热量流失与内部动力学：来自岩石圈强度的约束
Heat loss and internal dynamics of Venus from lithosphere strength
AI总结：
本研究通过反演金星地球物理数据构建全球热流模型，发现金星平均热流为31 mW m$^{-2}$，总热量流失为11-17 TW，散热比例远低于地球，且地壳熔融或榴辉岩化并非主导过程。
摘要：
金星缺乏板块构造且表面年龄较年轻（0.3-1 billion年），这促使了多种金星地球动力学模型的提出。金星内部的能量学驱动了这些模型；然而，由于缺乏对表面热流的直接约束，阻碍了对这些模型的定量评估。在此，我们提出了一个金星全球热流模型，以及总热量流失的估计值，这些结果是通过反演地球物理数据获得的，包括岩石圈有效弹性厚度、地壳厚度和放射性产热。金星的热流比地球低，且地理分布结构较弱，平均值为31 mW m$^{-2}$，但在与裂谷系统相关的高值区，其数值达到了地球活跃区域的典型水平。所得的总热量流失为11-17 TW，与总放射性产热的估计值相似。因此，目前金星按比例散失的热量远少于地球。此外，计算得出的地壳温度表明，地壳熔融或榴辉岩化并不是金星地壳中的主导过程。
英文摘要：
The absence of plate tectonics and the young surface age (0.3-1 billion years) of Venus have led to diverse geodynamic models for Venus. The energetics of the Venusian interior drive these models; however, the lack of direct constraints on surface heat flow hampers their quantitative assessment. Here we present a global heat flow model for Venus, as well as estimates of the total heat loss, obtained from an inversion of geophysical data, including lithospheric effective elastic thickness, crustal thickness, and radioactive heat production. Heat flow on Venus is lower and less geographically structured than on Earth, with an average of 31 mW m$^{-2}$, but with highs associated to rifts systems reaching values typical of active terrestrial areas. The obtained total heat loss is 11-17 TW, similar to estimates of the total radioactive heat production. Therefore, at present, Venus proportionally dissipates much less heat than Earth. Furthermore, the calculated crustal temperatures imply that crustal melting or eclogitization are not dominant processes in the Venusian crust.
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