Abstract

We studied the growth and evolutionary history of four major volcanoes of the Tharsis Province based on morphometry, age and hypsometric studies. Shield volcanoes of Tharsis volcanic province demonstrate marginally dissimilar landform evolutionary trends. Arsia Mons is distinct with a single caldera of large diameter and showed the highest asymmetry in the apron development. A convex hypsometric curve of Arsia Mons indicates tectonic dominance in its evolution. Olympus Mons, on the other hand, is concave in shape, suggesting an erosion dominated landform. Olympus Mons shows the highest symmetry in its morphology as a cone, while Ascraeus Mons and Pavonis Mons display a deviation from the symmetry due to the development of aprons. We determined the age of the caldera and the surrounding region of the four major shield volcanoes of Tharsis Province using the crater counting technique. Chronological studies using the crater counting technique indicate that the significant part of the Tharsis volcanic province belongs to the Late Amazonian period (< 300 Ma). Hypsometric studies indicate that Tharsis Montes are tectonically active, while Olympus Mons dominantly showed erosional activity in the recent past. Accordingly, the investigation of Tharsis Montes is a critical way to improve the understanding of evolutionary pathways of volcanic landforms of the Martian surface.

Research Highlights

1. 1.

   We studied the landform evolution of four major shield volcanoes of Tharsis volcanic province.

2. 2.

   Morphometric, chronologic and hypsometric analysis was carried out to understand the evolutionary trend.

3. 3.

   Hypsometric curve analysis showed that the landform evolution of Arsia Mons is dominantly tectonic.

4. 4.

   Chronological analysis shows that majority of the Tharsis volcanic province belongs to the Late Amazonian period.

中文翻译：

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Tharsis Montes 和 Olympus Mons of Mars 的地貌演化：来自形态测量、测压和年代学证据的见解

摘要

我们基于形态测量学、年龄和测压研究，研究了塔尔西斯省四个主要火山的生长和演化历史。塔尔西斯火山省的盾状火山显示出略有不同的地貌演化趋势。Arsia Mons 是一个独特的大直径火山口，在围裙发育中表现出最高的不对称性。Arsia Mons 的凸形测高曲线表明其演化过程中具有构造优势。另一方面，奥林匹斯山呈凹形，表明受侵蚀支配的地貌。Olympus Mons 在其形态上表现出最高的对称性，为圆锥体，而 Ascraeus Mons 和 Pavonis Mons 由于围裙的发展而表现出与对称性的偏差。我们使用火山口计数技术确定了塔尔西斯省四大盾状火山的火山口和周边地区的年龄。使用火山口计数技术的年代学研究表明，塔尔西斯火山区的重要部分属于亚马逊晚期（< 300 Ma）。Hypsometric 研究表明，Tharsis Montes 是构造活跃的，而 Olympus Mons 在最近的过去主要表现出侵蚀活动。因此，对塔尔西斯山的调查是提高对火星表面火山地貌演化路径认识的重要途径。300 毫安）。Hypsometric 研究表明，Tharsis Montes 是构造活跃的，而 Olympus Mons 在最近的过去主要表现出侵蚀活动。因此，对塔尔西斯山的调查是提高对火星表面火山地貌演化路径认识的重要途径。300 毫安）。Hypsometric 研究表明，Tharsis Montes 是构造活跃的，而 Olympus Mons 在最近的过去主要表现出侵蚀活动。因此，对塔尔西斯山的调查是提高对火星表面火山地貌演化路径认识的重要途径。

研究亮点

1. 1.

   我们研究了塔尔西斯火山省四个主要盾构火山的地貌演化。

2. 2.

   进行形态测量、时间序列和测高分析以了解进化趋势。

3. 3.

   高位曲线分析表明，Arsia Mons 地貌演化以构造为主。

4. 4.

   年代学分析表明，塔尔西斯火山省的大部分属于亚马逊晚期。