Crust-Mantle Structure beneath the Sinus Iridum-Mare Imbrium Basin of the Moon
Wang Xuyuan
Liang Qing
Chen Chao
Du Jinsong
Zhang Shuangxi
Abstract：In order to investigate the material migration of crust and mantle after the formation of large impact basins,a study on the undulation of crust-mantle interface,using new lunar gravity data is carried out.This has an important significance for the research of the formation and evolution of impact basin.The forward modeling of the gravity anomaly established by filling mare basalts in Sinus Iridum-Mare Imbrium basin area shows that the gravity anomaly only accounts for about 8% in the ampli-tude of total Bouguer gravity anomaly,while the rest 92% is mainly related to the perturbation of crust-mantle interface.The edge detection of the Bouguer gravity anomaly at different observing heights in Sinus Iridum-Mare Imbrium area indicates that the crust-mantle interface beneath the area of Sinus Iridum-Mare Imbrium northwest leans to the center of Mare Imbrium with increasing depth.It is concluded that extra mantle uplifts to Sinus Iridum area in the crust-mantle interface may have been caused by the impact forming Mare Imbrium basin.This or the later Sinus Iridum impact may have induced a second effect on the crust-mantle structure beneath Mare Imbrium basin.During the lunar mantle rebounds,there may have been a force drag-ging the mantle beneath the Mare Imbrium toward the Sinus Iridum area.
Keywords：MoonSinus Iridum-Mare Imbrium areacrust-mantle structuregravityedge detection
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1566-1575 )