月球典型撞击坑溅射物研究及对月球地质编图的意义

发布时间：2018-04-09 04:03

本文选题：月球　切入点：Kepler坑　出处：《岩石学报》2016年01期

【摘要】：撞击坑是月表最典型的地质单元,其溅射物作为撞击坑的坑外组成部分可分布到距离坑中心10个直径距离之外的区域,因此撞击溅射物也是月球地质编图中最重要的表达要素之一。本文使用月球勘测轨道器(LRO)的激光高度计(LOLA)数据、广角相机(WAC)影像、窄角相机(NAC)影像以及Clementine的UVVIS多光谱数据,研究了哥白尼纪正面月海区直径31km的Kepler撞击坑和背面月陆区直径30km的Necho撞击坑。哥白尼纪撞击坑溅射沉积物可以分为三个相:连续溅射沉积相(CE)、不连续溅射沉积相(DE)和辐射纹(CR)。连续溅射沉积相分布在最大约2.6个半径范围之内,不连续溅射沉积相分布在最大近11个半径范围之内,辐射纹分布在最大近29个半径范围之内。本文强调了多源数据结合在识别撞击坑溅射沉积物中的作用,对Kepler坑和Necho坑溅射沉积物进行了填图,不对称分布的特征表明这两个坑可能形成于倾斜撞击。
[Abstract]:The impact crater is the most typical geological unit on the surface of the moon. Its sputtering material can be distributed as an outside component of the crater to an area beyond 10 diameters away from the center of the crater.Therefore, impact sputtering is also one of the most important elements in lunar geological mapping.In this paper, the laser altimeter (Lola) data, wide angle camera (WAC) image, narrow angle camera (NAC) image and UVVIS multispectral data of Clementine are used.The Kepler impact crater in the Copernican frontal lunar area (31km) and the Necho crater in the backside lunar land area (30km) are studied.The sputter deposits in Copernican impact pits can be divided into three phases: continuous sputtering deposition (CEG), discontinuous sputtering deposition (DEE) and radiative striation (CRT).The sedimentary facies of continuous sputtering are distributed in the range of about 2.6 radii, the sedimentary facies of discontinuous sputtering are distributed in the range of nearly 11 radii, and the radiative lines are distributed in the range of nearly 29 radii.In this paper, the role of multi-source data in the identification of sputter sediments in impact pits is emphasized. The mapping of sputtering sediments in Kepler pits and Necho pits is carried out. The asymmetric distribution characteristics indicate that the two pits may have been formed by oblique impact.
【作者单位】：中国科学院地球化学研究所月球与行星科学研究中心;中国科学院大学;吉林大学地球科学学院;
【基金】：国家自然科学基金重大项目(41490634)及面上项目(41373068) 科技基础性工作专项(2015FY210500) 中国科学院知识创新工程重要方向项目联合资助
【分类号】：P184.5

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