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Hollows on Mercury: MESSENGER Evidence for Geologically Recent Volatile-Related Activity

机译:汞中空:地质学上最近与挥发有关的活动的信使证据

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摘要

High-resolution images of Mercury's surface from orbit reveal that many bright deposits within impact craters exhibit fresh-appearing, irregular, shallow, rimless depressions. The depressions, or hollows, range from tens of meters to a few kilometers across, and many have high-reflectance interiors and halos. The host rocks, which are associated with crater central peaks, peak rings, floors, and walls, are interpreted to have been excavated from depth by the crater-forming process. The most likely formation mechanisms for the hollows involve recent loss of volatiles through some combination of sublimation, space weathering, outgassing, or pyroclastic volcanism. These features support the inference that Mercury's interior contains higher abundances of volatile materials than predicted by most scenarios for the formation of the solar system's innermost planet.
机译:来自轨道的水星表面的高分辨率图像显示,撞击坑内许多明亮的沉积物表现出新鲜出现的,不规则的,浅的,无边缘的凹陷。凹陷或凹坑的范围从几十米到几公里不等,许多凹陷具有高反射率的内部和光晕。与火山口中心峰,峰环,底部和墙壁相关的主体岩石被解释为是由火山口形成过程从深处挖出的。空洞最可能的形成机制包括近期通过升华,空间风化,除气或火山碎屑火山作用的某种组合损失挥发物。这些特征支持了这样的推论,即水星内部的挥发性物质含量比大多数太阳系最里面行星形成情况所预测的要高。

著录项

  • 来源
    《Science》 |2011年第6051期|p.1856-1859|共4页
  • 作者单位

    The Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnThe Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnThe Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnThe Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnDepartment of Geological Sci¬ ences, Brown University, Providence, Rl 02912, USA;

    rnThe Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnThe Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA;

    rnDe¬partment of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA;

    rnDe¬partment of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA;

    rnSmithsonian In¬ stitution, Washington, DC 20013, USA;

    rnLunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei, 430074, P. R. China;

    rnDepartment of Geological Sci¬ ences, Brown University, Providence, Rl 02912, USA;

    rnDepartment of Geological Sci¬ ences, Brown University, Providence, Rl 02912, USA;

    rnSchool of Earth and Space Exploration, Arizona State University, Tempe, AZ 85251, USA.;

    rnInstitute of Planetary Research, German Aerospace Center, D-12489 Berlin, Germany;

    rnInstitute of Planetary Research, German Aerospace Center, D-12489 Berlin, Germany;

    rnInstitute of Planetary Research, German Aerospace Center, D-12489 Berlin, Germany;

    rnDepartment of Geological Sci¬ ences, Brown University, Providence, Rl 02912, USA;

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  • 正文语种 eng
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  • 入库时间 2022-08-18 02:54:10

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