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Basic structural geology of Venus: A review of the gaps and how to bridge them
Earth-Science Reviews ( IF 10.8 ) Pub Date : 2023-01-24 , DOI: 10.1016/j.earscirev.2023.104331
Simon Hanmer

The next decade will see new geological mapping of the surface of Venus spurred by multiple new science missions. Planetary scientists must be cognisant of gaps in our understanding of the geology of the second planet in order to plan and maximise the scientific value of these new missions. While our current knowledge of major aspects of volcanology and broad-scale tectonic features on Venus is reasonably advanced, within the limitations of available data. However, the same cannot be said of the basic structural geology of venusian extensional and shortening, and strike-slip features. Published interpretations of distributed extensional tectonic features on Venus do not account for the absence of associated regional strain localisation. Models of shortening tectonic features on Venus are based on structural geological analogies with potentially similar features elsewhere in the inner Solar System. However, the purported analogues on Mercury, Mars and the Moon, as well as commonly invoked terrestrial analogues, have their own issues, which have not been acknowledged or treated in the literature. In addition, empirical application of terrestrial map patterns as analogues for identifying and analysing strike-slip shearing on Venus has not taken account of the established Earth-based determinants of crustal-scale shear zone development. Application of the current state of basic structural geology on Venus to provide constraints on models of planet-scale tectonic behaviour, and their potential extension to the early Earth, is premature. Accordingly, it is both appropriate and timely to critically review the current state of basic structural geological understanding of Venus, with reference to the inner Solar System as a whole. Strategies are proposed for addressing some of the fundamental gaps in our understanding of the basic structural geology of Venus using both analogue modelling and currently available remotely-sensed data while awaiting the results of the planned new science missions in the mid-2030s.



中文翻译:

金星的基本构造地质学:对差距的回顾以及如何弥合它们

未来十年,将看到在多项新科学任务的推动下绘制新的金星表面地质图。行星科学家必须认识到我们对第二颗行星地质学的理解存在差距,以便规划和最大化这些新任务的科学价值。虽然我们目前对金星火山学和大范围构造特征的主要方面的了解相当先进,但在可用数据的限制范围内。然而,金星的伸展和缩短、走滑特征等基本构造地质却并非如此。已发表的对金星上分布的伸展构造特征的解释并未说明相关区域应变定位的缺失。金星上缩短构造特征的模型是基于与太阳系内部其他地方可能具有相似特征的结构地质类比。然而,水星、火星和月球上的所谓类似物,以及通常引用的地球类似物,都有其自身的问题,这些问题尚未在文献中得到承认或处理。此外,将地球地图模式作为类比来识别和分析金星走滑剪切的经验应用并未考虑地壳尺度剪切带发展的既定地球决定因素。应用金星基本构造地质学的现状来限制行星尺度构造行为的模型及其对早期地球的潜在扩展,还为时过早。因此,参考整个内太阳系,批判性地回顾金星基本结构地质认识的现状是适当和及时的。在等待 2030 年代中期计划的新科学任务的结果的同时,提出了一些战略,以解决我们在使用模拟建模和当前可用的遥感数据对金星基本结构地质学的理解上存在的一些基本差距。

更新日期:2023-01-28
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