摘要
撞击坑是月球、火星和水星等固态行星表面重要的地貌和构造,其形成时产生的溅射物包含了大量地质信息,是认识撞击坑形成过程和区域地质演化的重要研究对象。本文以冯·卡门撞击坑为研究对象,结合月球勘测轨道飞行器(LRO)影像数据、激光高度计(LOLA)地形数据、Clementine多光谱数据等对冯·卡门撞击坑的溅射物进行综合解析。冯·卡门撞击坑的溅射物后期改造比较严重,只有南部区域保存相对完整。选取连续溅射物中受其他撞击坑溅射物影响较小的区域,并以宽角相机(WAC)数据和高分辨率地形相机(TC)数据为基础,利用撞击坑提取工具CraterTools对均一的区域进行撞击坑统计分析,进而利用月球产率和年代学函数推导出绝对模型年龄,获得了冯·卡门撞击坑的年龄为4.15Ga。本文主要强调了多源数据在识别溅射物时的重要性,以及年代分析时排除周围溅射物影响的必要性。
Impact craters are a type of important geological landforms on the surfaces of solid planets such as the Moon,Mars and Mercury.The impact ejecta provides valuable geological information for understanding the impacting process and regional geological evolution of the planet.In this study,the ejecta of Von Kármán crater was investigated by combining Lunar Reconnaissance Orbiter(LRO)image data,Lunar Orbiter Laser Altimeter(LOLA)topographic data and Clementine multi-spectral data.Our results indicate that most of the ejecta within Von Kármán crater have been seriously alternated.The continuous ejecta that minor affected by other impact craters were selected and analyzed by using the Crater-Tools,based on Wide Angle Camera(WAC)and Terrain Camera(TC)image data.Then,the dating analysis was carried out,yielded an age of 4.15Ga(i.e.,pre-Nectarian)for Von Kármán crater.Our studies demonstrate that multi-source data is useful in the identification of ejecta and the necessity of excluding the influence of surrounding ejecta in the dating analysis.
作者
李圣卉
刘建忠
刘敬稳
王俊涛
张敬宜
傅泽华
张珂
LI ShengHui;LIU JianZhong;LIU JingWen;WANG JunTao;ZHANG JingYi;FU ZeHua;ZHANG Ke(Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;University of Chinese Academy of Sciences,Beijing 100049,China;Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China;Macao University of Science and Technology,Macao 999078,China)
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第9期2889-2899,共11页
Acta Petrologica Sinica
基金
国家自然科学重点基金项目(41941003)
中国地质调查局地质调查项目(DD20221645)
中国科学院前沿科学重点研究计划(QYZDY-SSW-DQC028)
民用航天预先研究重点项目(D020201)
广西科技基地与人才建设专项(AD1850007)联合资助。
关键词
冯·卡门撞击坑
多源数据
溅射物
年代分析
Von Kármán crater
Multi-source data
Ejecta
Chronological analysis
