云海撞击盆地的恢复及其地质演化研究

发布时间：2018-06-24 21:49

本文选题：云海 + 撞击盆地　；参考：《岩石学报》2016年01期

【摘要】：研究月海撞击盆地,尤其是古老的月海撞击盆地,有助于深入认识月球乃至太阳系中两种动力学即内动力和外动力地质作用的演化过程,也是研究月球早期演化和现今状态的重要纽带。云海撞击盆地为古老的撞击盆地之一,形成于前酒海纪,在后期的内外动力地质作用下,盆地有很大程度的改造。为了恢复云海撞击盆地原貌,深入认识该地区的地质演化过程,本文利用了LRO宽角相机影像数据、LOLA地形数据和GRAIL重力数据等多种类型的遥感数据,开展了云海撞击盆地演化的研究。结果显示,云海盆地是由一次撞击事件形成,具中央隆起的三环结构的撞击盆地,三环直径分别约为740km、500km、340km,盆地中心约为16°W,21°S。云海撞击盆地事件破坏了该地区原始月壳结构,随后岩浆喷出或溢流充填在撞击盆地中形成云海,塑造了现今观察到的云海地形特征和重力异常特征。
[Abstract]:The study of lunar sea impact basins, especially the ancient lunar sea impact basins, is helpful to the in-depth understanding of the evolution of the two dynamics of the moon and the solar system, namely, internal dynamics and extrinsic dynamics. It is also an important link to study the early evolution and present state of the moon. Yunhai impact basin is one of the ancient impact basins, which was formed in the Qianjiuhai period. During the late period of internal and external dynamic geology, the basin has been reformed to a great extent. In order to restore the original features of the Yunhai impact basin and to understand the geological evolution process in this area, the LRO wide-angle camera image data, LOLA topographic data and grail gravity data are used in this paper. The evolution of the Yunhai impact basin was studied. The results show that the Yunhai basin is formed by an impact event, with a central uplift of the three-ring structure. The diameter of the third ring is about 740km ~ 500km ~ (-1) ~ (340km), and the center of the basin is about 16 掳W ~ (-1) 21 掳S. The event of Yunhai impact basin destroyed the primitive lunar crust structure in this area, and then magma ejected or overflowed into the impingement basin to form the cloud sea, which shaped the topographic characteristics and gravity anomaly characteristics of the cloud sea observed today.
【作者单位】：中国科学院地球化学研究所月球与行星科学研究中心;中国科学院大学;吉林大学地球科学学院;
【基金】：国家自然科学基金重大项目(41490634)及面上项目(41373068) 科技基础性工作专项(2015FY210500) 中国科学院知识创新工程重要方向项目联合资助
【分类号】：P184

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