月表澄海—静海区遥感地质分析

月海盆地作为月球表面重要的地貌单元,分析其玄武岩喷发历史和构造作用,对于了解月球演化有着重要的意义。文中以澄海和静海两个相连通盆地为研究区,通过对LRO的DEM数据进行处理,获得两个月海的地形特征。基于Clementine多光谱数据处理,提取TiO2、FeO含量和成熟度分布图。经过对嫦娥一号CCD影像数据并结合LRO和LO全色波段影像的解译,提取了研究区126条月岭和114条月溪,并对比Cle-mentine提取的重力分布图,对其展布形式进行研究。综合分析结果表明,两个盆地虽然相邻连通,但岩性和构造分布有着明显的差别,玄武岩喷发不同期次界限明显,且澄海玄武岩年龄普遍晚于静海,相通处玄武岩与静海北部玄武岩同源。澄海中的线状构造展布形式与静海中的明显不同,呈现出一定规律,与质量瘤的有无及重力展布形式有关。

Geological interpretation with remote sensing of Mare Serenitatis and Mare Tranquillitatis on the lunar surface

Mare basin is an important landform on the surface of the moon and the analysis of its eruption history and tectonism is of great geological significance in understanding the lunar evolution.In this paper,taking two connected mare basins(Mare Serenitatis and Mare Tranquillitatis) as study area,the topographic features of the two mare basins were obtained by processing the DEM data of LRO.The maps of the percentage composition distribution of TiO2,FeO and maturity were obtained by using Clementine multispectral data.According to the basis maps of Chang'e I CCD images and LO and LRO panchromatic images,126 wrinkle ridges and 114 linear and arcuate rilles in this area were identified,and combined with the gravity map from Clementine,the distribution of these linear structures was discussed.The comprehensive analysis results showed that the lithology and tectonism of the two mare basins are very different,although they are so near.The boundaries of different eruption times were clear.Generally,the ages of basalts in Mare Serenitatis were younger than those in Mare Tranquillitatis.Basalts in the connected areas have the same origin with the north Mare Tranquillitatis.The spread patterns of the linear structures in Mare Serenitatis showed very different patterns with the Mare Tranquillitatis,which distributed regularly and were connected with the formation of the mascon and the distribution of the gravity.