月球虹湾地区地质特征解译及岩浆活动历史研究  

Geological features and magmatic activities history of sinus Iridum, the moon

作　　者：乔乐[1] 肖龙[1] 赵健楠[1] 黄倩[1] 

机构地区：[1]中国地质大学(武汉),行星科学研究所,武汉430074

出　　处：《中国科学：物理学、力学、天文学》2013年第11期1370-1386,共17页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金项目资助(批准号:41373066,41072045)

摘　　要：虹湾地区是我国嫦娥三号登月探测器的重要备选着陆区域之一,其平坦的地形、复杂的演化历史和丰富的地质特征显示出良好的工程保障性和较大的科学价值.该地区发育了丰富的地质特征,包括月海皱脊、月溪、撞击坑和月坑链,预示着该区域经历了复杂的地质演化历史.但受探测数据分辨率等方面的限制,前人对该地区岩浆活动的性质研究存在较大的差异,在矿物学、地球化学特征以及典型地貌解译方面也存在诸多不足.本文综合利用月球勘测轨道飞行器(Lunar Reconnaissance Orbiter,LRO)激光高度计(Lunar Orbiter Laser Altimeter,LOLA)及相机(LROC)数据、克莱门汀(Clementine)紫外-可见光(UVVIS)多光谱数据和月球矿物制图仪(Moon Mineralogy Mapper(M3))高光谱数据,对虹湾地区的地形特征、物质成分及典型地貌特征进行了较为系统的解译和分析.研究结果认为该区域经历了4次岩浆活动,不同期次岩浆活动充填的玄武岩成分差别较大,越往后期钛含量越高.虹湾内部以成熟的富辉石岩石为主,但是越往后期橄榄石含量逐渐增高,而周边高地区域以富长石岩石为主,在虹湾北部坑壁区域,出露了一些富橄榄石岩石,这些橄榄石可能来源于大型撞击作用挖掘的月幔物质.虹湾地区地势比较平坦,地质现象丰富,利于开展着陆就位探测.The Sinus Iridum region is one of the most important candidate landing targets for Chinese lunar landing mission Chang＇E-3 （CE-3）. Because of its flat topography, complex evolution history and abundance of geological features, it shows great significance to both science and engineering. There are abundant geological features, such as winkle ridges, mare rilles, impact craters and crater chains in this region, indicating complex evolution history. In this paper, we use Lunar Reconnaissance Orbiter （LRO） Altimeter （LOLA） and Camera （LROC） data to characterize regional topography and geological features. We deduce the iron and titanium content from Clementine ultraviolet-visible （UVVIS） data and generate mineral absorption features from the Chandrayaan-1 Moon Mineralogy Mapper （M3） imaging spectrum data. Results show that this region has experienced four magmatic events. The composition of these basaltic materials filled in different time changes from low-titanium basalts in earlier time to medium-titanium basalts in later time. The inner Sinus Iridum has a composition of mature and pyroxene-rich materials, but olivine abundance of these pyroxene-rich materials increases from old to young. The surrounding highlands have a dominantly feldspathic composition. In the north wall, there exposed some possible mantle origin olivine-rich materials. The comparable flat topography condition and abundant geological features make Sinus Iridum an excellent site to carry out in-site analyses and rover exploration.

关 键 词：虹湾 月球 地质特征 岩浆活动 月球探测 

分 类 号：P184[天文地球—天文学]