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《Acta Geodaetica et Cartographica Sinica》 2012-04
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Airy Isostasy on the Moon:Implications for Crustal Thickness

FENG Hai1,2,LI Jiancheng1,2,LI Dawei1,2,ZHANG Shoujian1,2,LIU Zhiyong1,2 1.School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;2.Key Laboratory of Geospace Environment and Geodesy of Ministry of Education,Wuhan University,Wuhan 430079,China  
Lunar geoid(or selenoid) anomaly and topogrphy variations are the expressions of its internal density anomaly and boundary undulations.So the geoid to topography ratio(GTR) can be used to study the isostatic state of the moon and its crustal thickness.A new lunar crustal thickness model was derived by GTR technique from filtered gravity model SGM100h and topography model STM359_grid-02,with the mare fill and subcrustal mass anomalies removed.This model indicates that the lunar crust has an average thickness of 36.9 km,and the average farside thickness is 13.5 km thicker than nearside.The crustal thicknesses at Apollo 12/14 sites of our crustal thickness model are 28.3 km and 29.1 km,respectively.It also shows that the crust beneath the mare basins is generally thinner than the regions around.
【Fund】: 国家自然科学基金(40637034;41074014)
【CateGory Index】: P184
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【Citations】
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