月震与月球内部结构

发布时间：2018-01-17 18:17

本文关键词：月震与月球内部结构　出处：《地球化学》2010年01期 　论文类型：期刊论文

【摘要】：阿波罗(Apollo)登月计划在月球表面上布设的月震仪为探索月球内部结构提供了极佳资料来源,本文综述了近年来对月震资料的分析及利用月震资料研究月球内部结构的相关研究结果。月震仪记录到的振动信号主要分为天体撞击、月震和局域震动三类。天体撞击又分为流星体撞击和人造天体撞击,其震源位于月球表面。月震按震源深度分布分为浅源月震与深源月震,前者的震源深度大约为50～220km,释放的能量较大但发生次数较少,记录信号以高频成分为主;后者的震源深度大约为700～1150km,并具丛集性,与潮汐应力有关。局域震动在月球日出与日落时出现,被认为是由近月表的热破裂和变形过程所产生。月球内部结构的多数研究集中于月震仪下方月壳厚度计算及上月幔一维速度模型的建立。结果表明月壳平均厚度大约为40km,而不是早期研究得到的60km左右;通过现有的月震资料还不能得到月球下月幔、月核、月球深部间断面的相关信息。文章最后对月球内部的进一步研究做了总结和展望。
[Abstract]:The lunar seismograph installed on the lunar surface by Apollo Apollo provides an excellent source of information for exploring the interior structure of the moon. This paper summarizes the analysis of lunar seismic data in recent years and the related research results of lunar interior structure by using lunar seismic data. The vibration signals recorded by the lunar seismograph are mainly divided into celestial body impact. The celestial body impact is divided into meteoroid impact and artificial celestial body impact, whose epicenter is located on the surface of the moon. The monthly earthquake is divided into shallow source and deep source according to the depth distribution of the source. The focal depth of the former is about 50 ~ 220km, the energy released is larger but the frequency of occurrence is less, and the recording signal is mainly composed of high-frequency components. The focal depth of the latter is about 700,1150km, and it is clustered and related to tidal stress. Local vibration occurs at sunrise and sunset of the moon. It is believed that the thermal rupture and deformation of the near moon surface resulted from the process of thermal rupture and deformation. Most studies on the interior structure of the moon are focused on the calculation of the thickness of the lunar crust under the lunar seismograph and the establishment of a one-dimensional velocity model for the upper mantle. The results show that the average thickness of the lunar crust is calculated. About 40 km. It is not about 60 km from early research; Based on the available monthly seismic data, it is not possible to obtain the relevant information of the moon's lower mantle, moon nucleus and the deep interfacial surface of the moon. Finally, the further research on the interior of the moon is summarized and prospected.
【作者单位】：中国科学院地质与地球物理研究所;
【基金】：国家自然科学基金(40674028,90914011)
【分类号】：P184
【正文快照】： 162010年月球是地球唯一的天然卫星,也是距离地球最近的天体,其起源和演化过程一直是人类研究兴趣之所在。这不仅是由于月球提供了不同于地球的类地天体研究样本,更是由于月球保留了已在地球上消失了的类地行星早期的地质演化历史记录[1]。在现代科学技术的支持下,人类对月球

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