政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/127580
English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  全文笔数/总笔数 : 96245/126860 (76%)
造访人次 : 32263961      在线人数 : 373
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    请使用永久网址来引用或连结此文件: http://nccur.lib.nccu.edu.tw/handle/140.119/127580


    题名: The various ages of Occator crater, Ceres: Results of a comprehensive synthesis approach
    作者: 范噶色
    Gasselt, S. van
    Neesemann, A.
    Jaumann, R.
    Roatsch, T.
    Raymond, C.A.
    贡献者: 地政系
    关键词: Asteroid Ceres;Asteroids;Planetesimals;Cratering;Impact processes;Geological processes
    日期: 2019-03
    上传时间: 2019-11-26 14:42:49 (UTC+8)
    摘要: The 90.5-km Occator crater, with its peculiar and unique bright spots, is one of the most prominent and renowned feature on Ceres. Occator attracted broad public attention in scientific media as it is proposed to exhibit signs of post-impact cryovolcanic activity. In order to understand the time sequence of deposition, several attempts were made during DAWN’s primary mission by different research groups to date geomorphologic key units using superposed crater densities. Resulting absolute model formation ages for Occator’s ejecta and its interior lobate deposits range from 200 Ma to 78 Ma and about 100 Ma to 6.9 Ma, but were based on different cratering chronology models, measurements on image data at varying resolution, and different statistical and methodological approaches. Here we present the results of a comprehensive approach of determining absolute model formation ages for Occator. This is achieved by using the best resolved Framing Camera image data, by careful treatment of secondary crater admixture and the natural variability of crater detection and sizes by different crater analysts, and by applying appropriate, objective criteria for count area selection. In this context, we evaluate previously published model ages and explain why our results are likely to yield more consistent and robust information about the formation age of Occator. We also show that, in contrast to previous publications, CSFDs measured on Occator’s less competent ejecta blanket, and its more competent cryovolcanic- or impact melt related interior lobate deposits (ILDs), are so similar to each other, that the slight differences might rather be explained by different scaling parameters in different target materials or that the ILDs have formed almost contemporaneously or only shortly after the Occator forming impact.
    關聯: Icarus, Vol.320, pp.60-82
    数据类型: article
    DOI 連結: https://doi.org/10.1016/j.icarus.2018.09.006
    DOI: 10.1016/j.icarus.2018.09.006
    显示于类别:[地政學系] 期刊論文

    文件中的档案:

    档案 大小格式浏览次数
    index.html0KbHTML118检视/开启


    在政大典藏中所有的数据项都受到原著作权保护.


    社群 sharing

    著作權政策宣告
    1.本網站之數位內容為國立政治大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,惟仍請適度,合理使用本網站之內容,以尊重著作權人之權益。商業上之利用,則請先取得著作權人之授權。
    2.本網站之製作,已盡力防止侵害著作權人之權益,如仍發現本網站之數位內容有侵害著作權人權益情事者,請權利人通知本網站維護人員(nccur@nccu.edu.tw),維護人員將立即採取移除該數位著作等補救措施。
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈