...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geophysical research. Planets >Cohesions, friction angles, and other physical properties of Martian regolith from Mars Exploration Rover wheel trenches and wheel scuffs
【24h】

Cohesions, friction angles, and other physical properties of Martian regolith from Mars Exploration Rover wheel trenches and wheel scuffs

机译：火星探测漫游者车轮沟槽和车轮磨损产生的火星长石的内聚力，摩擦角和其他物理属性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Mars Exploration Rovers Spirit and Opportunity investigated the physical properties of Martian regolith in 7 wheel trenches and 20 wheel scuffs distributed along traverses at Gusev crater and Meridiani Planum. Specialized wheel-trenching sequences allowed analysis of wheel motor and suspension telemetry to determine regolith friction angle φ and cohesion c at trench sites. Friction angles were 30°-37°, and cohesions were 0-2 kPa. Simpler wheel-scuff maneuvers were analyzed for cohesion by assuming the range of φ determined from trenches; cohesions in wheel-scuffed regoliths were from 0 to 11 kPa. Regolith φ and c can be related to regolith origins. Grain sorting, compaction, shape, size, and angularity influence φ. Impact cratering and aeolian processes have affected grain angularity and sorting of Martian regolith at both Mars Exploration Rover (MER) landing sites and contend in opposing ways to determine grain characteristics in the regolith. Friction angles are consistent with dry, rigid, nonplaty grains with particle size frequencies dominated by very fine sand (as seen by the Microscopic Imager or MI) with at least some grain rounding (unresolved by MI), reflecting physical weathering from aeolian saltation. Friction angle results from MER trenches therefore indicate that regolith states are between fully mature aeolian materials and impact debris. MI and color Pancam views show trench tailings and trench floors are redder, brighter, and have more intermixed extremely fine (unresolved) grains than regolith closer to the surface disturbed and exposed only by rolling tracks.
机译：火星探测漫游者精神与机遇号研究了在Gusev火山口和Meridiani Planum沿横向分布的7个轮trench和20个轮sc中的火星长石的物理特性。专门的车轮开挖程序可以对车轮电机和悬架遥测进行分析，从而确定沟槽位置处的重石摩擦角和内聚力c。摩擦角为30°-37°，内聚力为0-2 kPa。通过假设从沟槽确定的φ范围，分析了更简单的轮滑操纵的内聚力。带轮磨损的碎石的内聚力为0至11 kPa。 Regolithφ和c可能与Regolith的起源有关。谷物的分类，压实度，形状，大小和棱角会影响φ。撞击坑和风成过程已经影响了两个火星探测漫游者（MER）着陆点的火成岩角化程度和分选，并以相反的方式进行竞争以确定该变石的晶粒特征。摩擦角与干燥的，刚性的，非片状的晶粒一致，这些晶粒的频率由非常细的砂（如显微成像仪或MI所见）所控制，且至少有一些晶粒变圆（MI无法解析），这反映了风成盐分的物理风化作用。因此，MER沟槽的摩擦角结果表明，软泥状态处于完全成熟的风沙材料和冲击碎屑之间。 MI和彩色Pancam视图显示沟槽尾部和沟槽地板更红，更亮，并且与更细小的（未解析的）晶粒相互混合，而更接近于仅受滚动轨道干扰和暴露的表面的重新碎屑。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号