基于高分辨率卫星重力和地形数据的月球Apollo撞击坑物理参数反演

发布时间：2018-04-24 23:26

本文选题：重力场模型 + 重力/地形导纳　；参考：《中国科学:物理学力学天文学》2015年02期

【摘要】：针对表面载荷模型较难反演撞击坑物理参数,以往重力地形数据因分辨率低不适合大多数小尺度撞击坑物理特征分析,提出构建新的撞击坑载荷模型.结合内部载荷和最新高分辨率卫星重力地形数据,对Apollo撞击坑平均月壳厚度、平均月壳密度、载荷比、填充物比率和岩石圈弹性厚度等物理参数进行反演.结果表明模型导纳谱很好地拟合了观测导纳谱.本文求解的平均月壳厚度比较支持最新研究结果 34 km,平均月壳密度2480 kg/m3与最新给出的平均月壳密度2550 kg/m3相接近.研究区域的弹性厚度偏小,约为7 km.较小的弹性厚度可能与撞击坑地理位置及早期撞击事件有关,也可能与月球岩石圈的力学性质有关.
[Abstract]:Because the surface load model is difficult to retrieve the physical parameters of the impact crater, the previous gravity terrain data is not suitable for the physical characteristics of most small scale impact pits because of the low resolution. The new load model of the impact pit is proposed. The average monthly shell thickness of the Apollo impact crater is combined with the internal load and the latest high-resolution satellite gravity terrain data. The inversion of the physical parameters, such as the monthly shell density, the load ratio, the filler ratio and the lithosphere elastic thickness, shows that the model admittance spectrum is well fitted to the observational admittance spectrum. The average monthly shell thickness in this paper supports the latest research results 34 km, the average monthly shell density is 2480 kg/m3 and the latest average monthly shell density is 2550 kg/m3 phase. It is close. The elastic thickness of the study area is small, and the smaller elastic thickness of about 7 km. may be related to the location of the impact pit and the early impact events, and it may also be related to the mechanical properties of the lunar lithosphere.

【作者单位】：贵州师范大学物理与电子科学学院;中科院国家天文台-贵州师范大学天文研究与教育中心;武汉大学测绘遥感信息工程国家重点实验室;
【基金】：国家自然科学基金(批准号:41404021,41374024) 贵州省科学技术基金(编号:黔科合J字[2014]2128) 贵州师范大学博士科研项目资助
【分类号】：P184

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