...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Observations at the Mars Pathfinder site: Do they provide 'unequivocal' evidence of catastrophic flooding?
【24h】

Observations at the Mars Pathfinder site: Do they provide 'unequivocal' evidence of catastrophic flooding?

机译：在火星探路者网站上的观察：它们是否提供了灾难性洪水的“明确”证据？

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

After Mars Pathfinder landed at the mouth of Ares Vallis, a large channel that drains into the Chryse Planitia basin, the mission reports unanimously supported the interpretation that the lander site is the locus of catastrophic flooding by noting that all aspects of the scene are consistent with this interpretation. However, alternatives cannot be ruled out by any site observations, as all aspects of the scene are equally consistent with other interpretations of origin, namely, ice and mass-flow processes subsequently modified by wind erosion. The authors discuss alternative explanations for the geologic history of the channel based on a regional view of the circum-Chryse channels from Viking images (our best broad-scale information to date) and the local view from the recent Pathfinder landing site. Mega-indicators of channel origin, the regional geomorphology, geology, and planetary climatic conditions, taken together suggest some combination of flood, mass flow, glacial, and eolian processes. The macro-indicators of channel origin (sedimentologic) are also not indicative of one process of emplacement, either as single criteria or taken cumulatively. Finally, the micro-indicators of channel origin (geochemical and mineralogic composition) do not provide very tight constraints on the deposits' possible origins other than that water was in some way involved.
机译：在火星探路者降落到一条排入Chryse Planitia盆地的大通道Ares Vallis口后，任务报告一致认为，着陆点是灾难性洪水的发源地，并指出场景的各个方面与这种解释。但是，任何现场观察都不能排除替代方案，因为场景的所有方面都与其他原产地解释一致，即随后因风蚀而改变的冰和质量流过程。作者根据维京影像（我们迄今为止最好的大规模信息）中的环克莱斯河通道的区域视图以及最近的探路者登陆点的局部视图，讨论了该通道的地质历史的其他解释。渠道起源，区域地貌，地质和行星气候条件的巨型指标加在一起表明洪水，质量流量，冰川和风成过程的某种组合。通道起源的宏观指标（沉积学的）也不能作为单一标准或累计使用来指示一种安置过程。最后，除了水以某种方式涉及到之外，航道成因的微观指标（地球化学和矿物组成）并未对矿床的可能成因提供非常严格的限制。

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