论文标题
基于地层的关系与影响火山口的地层关系
Timing of the faulting on the Wispy Terrain of Dione based on stratigraphic relationships with impact craters
论文作者
论文摘要
Dione的尾随半球的特征是稀疏的地形，在那里，它表现出半球尺度的网络网络，该网络是在月球壁cratered表面上超过的伸展构造断层。这些断层可能反映了过去的内源性活动和狄奥尼的内部热病史。尽管原始坡道的新鲜暴露表明断层的时机相对较新，但断层的绝对年龄仍然不确定。为了估计断层的时机，我们研究了冲击坑和断层之间的地层关系。使用Cassini航天器上的ISS摄像机获得的高分辨率图像，我们研究了直径超过或等于10 km的陨石坑，与断层合重10 km，并将其分类为craters craters crosscut claters或superposed Craters。结果，至少有82％的陨石坑被解释为横切火山口的明确例子，尽管地层关系通常模棱两可，但12％的陨石坑被解释为超级陨石坑的候选。超植物陨石坑和预测的壁层速率的稀缺性表明，稀疏地形的断层为0.30-0.79 ga。如果假定有12-18％的陨石坑被认为是超级实力的，则断层的时间可能在0.30-0.79 ga范围内。但是，这是可能的缺点，即可能的缺点。
The trailing hemisphere of Dione is characterized by the Wispy Terrain, where it exhibits a hemispheric-scale network of extensional tectonic faults superposed on the moon's cratered surface. The faults likely reflect past endogenic activity and Dione's interior thermal history. Although fresh exposures of pristine scarps indicate that the timing of the faulting is relatively recent, the absolute age of the faulting remains uncertain. To estimate the timing of the faulting, we investigated stratigraphic relationships between impact craters and faults. Using high-resolution images obtained by ISS cameras onboard the Cassini spacecraft, we investigated craters with diameters exceeding or equal to 10 km that coincide spatially with the faults, and classified the craters as crosscut craters or superposed craters. As a result, at least 82% of the craters were interpreted as clear examples of crosscut craters and 12% of the craters were interpreted to be candidates of superposed craters, although stratigraphic relationships are often ambiguous. The paucity of superposed craters and a predicted cratering rate indicate that the faulting of the Wispy Terrain is 0.30-0.79 Ga. If 12-18% of the craters are assumed to be superposed, the timing of the faulting could be in the range 0.30-0.79 Ga. However, it is possible that the faulting of the Wispy Terrain is still ongoing.
