We have analyzed mass wasting features, their distribution and deposit geometry on the two largest main asteroid belt objects—protoplanet Vesta and dwarf planet Ceres—and compared their geomorphology and mobility. Both asteroids have similar surface accelerations, but different surface compositions. Based on our observations and previous studies, we categorized three distinct morphological mass wasting classes: slumps, slides, and flow‐like movements. We conclude that Ceres has abundant features of flow‐like mass movements. Further, sliding and flow‐like characteristics are identified in craters within mid‐latitudes which supports the possibility of the presence of water ice in the near subsurface of Ceres. Vesta predominantly shows characteristics of dry granular‐like slide features which are distributed homogenously across the surface. By plotting the ratio between fall height (H) and run‐out length (L) (effective coefficient of friction, H/L) against the run‐out length and spreading width (W), we demonstrate that deposits on Vesta terminate on shorter distances, whereas on Ceres they travel longer distances. The deposit geometry and the similar surface gravity on both asteroids suggest that the material composition and volatile component have a significant effect on deposit emplacement. However, both bodies’ mass movements have similar effective coefficients of friction, even though Vesta's regolith is comparatively dry, whereas Ceres is rich in water ice. This leads to the conclusion that volatile content alone cannot be responsible for low effective coefficients of friction, and that more than one geological process is needed to explain the mass motion behavior and morphology.

中文翻译：

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挥发物对维斯塔和谷神星大量浪费过程的影响

我们分析了两个最大的小行星带主要物体（原行星维斯塔和矮行星谷神星）上的质量消减特征，它们的分布和沉积几何形状，并比较了它们的地貌和流动性。两种小行星的表面加速度相似，但表面组成不同。根据我们的观察和先前的研究，我们将形态学上的三种浪费类型分类为：坍落度，滑坡和类似流动的运动。我们得出的结论是，谷神星具有类似流动的质量运动的丰富特征。此外，在中纬度内的陨石坑中发现了滑动和类似流动的特征，这支持了谷神星附近地下存在水冰的可能性。维斯塔（Vesta）主要表现出干燥的颗粒状滑动特征，这些特征均匀地分布在整个表面上。H）和跳动长度（L）（有效摩擦系数H / L）对跳动长度和铺展宽度（W），我们证明了Vesta上的沉积物终止距离较短，而Ceres上的沉积物传播距离较长。两种小行星上的沉积物几何形状和相似的表面重力表明，材料组成和挥发性成分对沉积物的位置有显着影响。然而，即使维斯塔的重石相对干燥，而谷神星富含水冰，两个物体的质量运动也具有相似的有效摩擦系数。这得出的结论是，仅挥发物含量不能导致较低的有效摩擦系数，并且需要一个以上的地质过程来解释质量运动行为和形态。