利用重力场和地形数据反演月壳厚度  

INVERTION OF CRUSTAL THICKNESS OF MOON FROM GRAVITY FIELD AND TOPOGRAPHY DATA

作　　者：丰海[1] 李建成[1] 张守建[1] 邢乐林[2] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]中国地震局地震研究所,武汉430071

出　　处：《大地测量与地球动力学》2009年第3期131-134,140,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40637034)

摘　　要：引起月球重力扰动的主要因素有3种：表面地形、莫霍面起伏及月海玄武岩填充。利用地形模型GLTM-2和重力场模型LP165,在忽略月海玄武岩厚度影响的情况下,分离出正面纬度±60°范围内地形和莫霍面起伏引起的重力扰动,进一步计算得到月壳厚度。结果表明：该区域月壳厚度在15-76 km,平均48.6 km;月海盆地下月壳明显变薄。The gravity anomalies are mainly resulted from three factors： terrain gravity effects, mare basalts fill and Moho relief attraction. The terrain model GLTM-2 and the lunar gravity field model LP165 are used to estimate the crustal thickness between ± 60° latitude of the nearside with the assumption that the thick of mare basalts fill is neglected. Additionally, a combinated crustal map is obtained. On the basis of the results the following conclusion can be drawn out ： that the crustal thickness of the nearside of the Mon is between 15 km and 76 km, and the average is 48.6 km. It also shows that a generally thinner crust beneath the mare basins than regions around.

关 键 词：月球重力场 月球地形 地形改正 布格重力异常 月壳厚度 

分 类 号：P184.57[天文地球—天文学]