Venus is currently characterized by stagnant‐lid mantle convection, but could have previously experienced episodes of global resurfacing due to lithospheric overturn. Using numerical models of Venus's interior, we attempt to explain Venus's surface characteristics in the context of interior evolution and to understand how Venus's tectonic history has diverged from Earth's. For both the stagnant‐ and the episodic‐lid regime, we explore the role of reference mantle viscosity; for the latter regime, we also explore the role of the lithospheric yield stress. Our stagnant‐lid models predict thicker crust and younger surface than typically inferred from cratering statistics. When considering resurfacing episodes, the yield stress influences the frequency of overturns, which limits crustal thickness to better agree with previous independent estimates. Surface age is variable and depends on overturn frequency and resurfacing rate between overturns but reaches larger values just before an upcoming overturn event compared to values in the stagnant‐lid cases. Both regimes predict substantial lateral variations in surface age, instead of an end‐member uniform surface age indicating the cessation time of the last overturn, because ongoing volcanic resurfacing is spatially heterogeneous and dominates over tectonic resurfacing. Reviewing the crater‐based surface age variations suggests that the model‐predicted age spreads in the episodic scenario could be consistent with Venus's cratering record. Moreover, we find that a small fraction of crust can resist recycling during overturns. These outcomes indicate that overturn events may allow for surface age variations that reproduce Venus's surface better than stagnant‐lid models.

中文翻译：

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岩石圈翻转动力学及其对金星表面的影响

金星目前的特征是停滞的上地幔对流，但由于岩石圈的倾覆，金星以前可能经历了全球重铺。我们使用维纳斯内部的数值模型，试图在内部演化的背景下解释维纳斯的表面特征，并了解维纳斯的构造​​历史是如何与地球不同的。对于停滞的和偶发的盖层，我们探索了参考地幔粘度的作用。对于后者，我们还探讨了岩石圈屈服应力的作用。我们的停滞滑坡模型预测的地壳厚度和表面较年轻，比通常由火山口统计推断的要多。考虑重铺表面时，屈服应力会影响倾覆的频率，这限制了地壳的厚度，以更好地与先前的独立估计相符。表面年龄是可变的，取决于倾覆频率和倾覆之间的重铺率，但与即将发生滑坡的情况相比，即将发生倾覆事件之前，表面年龄会达到更大的值。这两种方案都预测了地表年龄的重大侧向变化，而不是表明最后一次倾覆停止时间的末段成员均一的地表年龄，因为正在进行的火山铺面在空间上是非均质的，并且在构造铺面中占主导地位。回顾基于陨石坑的地表年龄变化，表明在情景情景中模型预测的年龄分布可能与金星的陨石坑记录一致。此外，我们发现一小部分地壳可以抵抗倾覆过程中的再循环。