月表线性构造定量提取与演化分析:以静海月岭、月溪为例

The main lineament quantitative extraction and the analysis of their evolution on lunar surface:The ridges and the rills in Mare Tranquillitatis as an example

线性构造是月球表面除环形构造外另一种重要的构造样式,呈线状延伸。月表线性构造种类繁多,其成因也具有多样性。它能反映全月球或者区域性的构造特征与应力状态,在某种程度上反应月球内部的地质信息,对研究月球的构造演化有重要的意义。文中以静海地区为例,经过对"嫦娥二号"CCD的影像数据及从中提取的DEM数据进行解译,提取出了284条月岭和71条月溪,并对月岭月溪进行分类和统计分析,然后结合静海地区线性构造的分布特征及坡度图、等值线图,分析其演化过程。结果表明,静海地区的月溪月岭大部分分部在西部高程较低的区域;静海盆地月溪的形成时间与盆地形成及玄武岩的填充时间大致相同,月岭的形成时间大致与撞击坑的形成时间相同;静海盆地中一端延伸至撞击坑的月岭形成模型属于火山成因模型中的堤坝模型。

The lineaments,besides ring structures,are another important structural style,which present linear extension on lunar surface.There are a great variety of lineaments and their origins are diverse.The lineaments which are of great significance to study the tectonic evolution of the moon,could reflect whole lunar or regional tectonic characteristics and their stress state,and in a certain extent the geological information inside the moon,which is important in the research on the tectonic evolution of the moon.In this paper,taking Mare Tranquillitatis as the research region,284 ridges and 71 rills are identified on the basis of Chang＇E II CCD images and DEM data.Then the ridges and the rills can be classified and statistical analysis be conducted.The evolution processes are analyzed by using slope map and contour map combining the distribution of the lineaments on mare region.The result shows that the ridges and rills are mostly distributed in a lower elevation area in the west;the time of the rill formation in Mare Tranquillitatis is nearly the same as the formation of the basin and the filling of basalts,and the time of the ridge formation is almost equivalent with the formation of the impact craters;the formation model of the ridges that one end of Mare Tranquillitatis extends to a crater belongs to the dike model of volcanic process.