虹湾东缘雁列式月岭构造带形貌特征与成因模式研究  

Morphology and genetic model of en echelon wrinkle ridges on the eastern edge of Sinus Iridum

作　　者：俞天石[1,2] 颜丹平[1,3] 许延波[1,4] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]湖南省地质博物馆,湖南长沙410004 [3]中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083 [4]山东黄金地质矿产勘查有限公司,山东莱州261400

出　　处：《地学前缘》2012年第6期37-46,共10页Earth Science Frontiers

基　　金：国家高技术研究发展计划"863"项目(2009AA122201)

摘　　要：月岭作为月海中一种广泛分布的线性构造,多表现为褶皱逆冲推覆为主的构造样式,且具雁列式展布。因此,月岭对月表区域乃至全月的构造应力分析有着非常重要的指示作用,但其成因机制不清。虹湾是中国嫦娥绕月探测工程研究的重点区域,区域内最明显的线性构造是虹湾东缘呈雁列式展布的月岭构造带,对这一月岭构造带的研究将有助于了解虹湾地区的区域应力特征和构造演化过程。文中通过对虹湾东缘雁列式月岭构造带的高分辨率影像进行解译并与其他区域对比分析,结合虹湾地区已有地质资料和前人提出的相关构造演化模式及目前最新的研究成果,认为虹湾东缘雁列式月岭构造带受虹湾撞击坑坑缘基底和表面玄武岩性影响,虹湾撞击盆地沉降引起的径向挤压应力和表面熔岩流导致的挤压应力由于方向与大小的差异,共同导致该月岭构造带呈类似走滑剪切中右阶左行的形貌特点。在此基础上讨论了此月岭构造带的演化过程,并根据月岭与撞击坑的交切关系,发现虹湾东缘月岭构造带在哥白尼纪仍在继续活动。Wrinkle ridge is a kind of linear structures,which distributes most widely in the mare.It usually presents a fold-thrust tectonic style and distributes in an en echelon style.Thus,wrinkle ridges indicate the tectonic stress characteristics of lunar surface regions even of the whole moon,but its formation mechanism is unclear yet.Sinus Iridum is the study area that the Chang＇e lunar exploration project focusing on.The most obvious linear structure in this region is the en echelon wrinkle ridges on the eastern edge of Sinus Iridum.The study of this wrinkle ridge zone will help to understand the regional stress characteristics and tectonic evolution of the Sinus Iridum area.This paper interpreted high-resolution images of the wrinkle ridges on the eastern edge of Sinus Iridum and comparatively analysed conditions in other regions.Combining previous geological data and tectonic evolution model,it indicated that the en echelon wrinkle ridges are affected by the substrate of the Sinus Iridum crater edge and the surface basalt lithology.It may have been developed under the radial compressional stress caused by basin subsidence and the shear stress caused by basalt movement.On this basis,this paper discussed the evolution of the wrinkle ridges,and discovered that they still were active in the Copernicus.

关 键 词：月岭 雁列式 虹湾 

分 类 号：P184.4[天文地球—天文学]