月岭形成机制及其与潮汐力的相关性分析  

Formation Mechanism of Lunar Ridges and the Correlation Analysis with Tidal Forces

作　　者：韦蔚[1,2] 刘少峰[1,2] 王凯[1,2] 奚晓旭[1,2] 李力[1,2] 焦中虎[1,2] 吴志远[1,2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国地质大学地质过程与矿产资源国家重点实验室,北京100083

出　　处：《现代地质》2012年第1期198-204,共7页Geoscience

基　　金：国家"863"计划重点项目(2009AA122201);高等学校学科创新引智计划项目(B07011)

摘　　要：月岭作为月表常见的线性构造类型之一,具有一定的分布规律。利用LRO(Lunar Reconnaissance Orbiter)的DEM数据提取月岭剖面并进行了构造分析,认为月岭主体为逆冲断层叠加牵引褶皱的挤压构造形成机制。前人多用月海盆地沉降叠加月球热能收缩解释月岭的成因,但它无法解释盆地中央月岭呈近南北向的优选方位,这种现象可能是受到近东西向区域性挤压应力的影响,与潮汐力对月球中低纬度区域的应力作用状态相符,推测潮汐力可能是盆地中央月岭形成的主因。综合利用嫦娥一号CCD影像数据、Lunar Orbiter和LRO全色波段影像数据,解译识别出月球正面中低纬度1 464条月岭。对其进行方向统计,结果表明,月岭整体走向也与Melosh预测的在潮汐力作用下形成的构造样式相似。由此推测,月岭的展布与潮汐力具有很强的相关性,进一步论证了月岭的形成与潮汐力有关。As a common linear structure on the surface of the Moon,lunar ridges have certain distribution regularity.The maps of lunar ridges obtained from the DEM data of LRO（Lunar Reconnaissance Orbiter） were analyzed,and the result revealed that most lunar ridges are of compressional formation mechanism as a combination of drag folds on the surface and thrust faults underneath.The former study always explained the dynamic origin of lunar ridges by a combination of the basalt subsidence of the mare basin and the thermal shrink of the Moon,but it cannot explain the preferred NS orientation of these lunar ridges in the central area of the mare basin.This phenomenon is probably influenced by the regional compressional stress oriented to the east-west,which is corresponding to the stress state of the tidal forces at low and middle latitudes of the Moon,and it can be inferred that tidal forces may be the main factor for the formation of these lunar ridges.According to the CCD images of Chang＇e I and panchromatic images of Lunar Orbiter and LRO,1,464 pieces of lunar ridges at low and middle latitudes of the Moon were identified,and the orientations of them were analyzed.It reveals that the overall trend of these lunar ridges is roughly consistent with the tectonic pattern predicted with tidal forces by Melosh.It can be concluded that there is a strong correlation between tidal forces and the distribution styles of lunar ridges.Furthermore,this study proves that the formation of lunar ridges is related to tidal forces.

关 键 词：潮汐力 月岭 线性构造 热能演化 

分 类 号：P184.6[天文地球—天文学]