Scholarlink

<p>The present-day distribution of surface and subsurface water on Mars reflects a complex history of exchange between the planet’s surface and interior since its formation. Constraining the water content of the deep mantle is essential for estimating the planet’s total water budget and understanding its long-term geologic and hydrologic evolution. Yet, the abundance of water at depth remains loosely constrained. Here, we analyze seismic data from global tectonic marsquakes and meteorite impacts recorded by the InSight mission, and identify evidence for weaker attenuation in Mars’ deep mantle (500–1500 km), in contrast to Earth. This low attenuation likely reflects fundamental differences in mantle properties between the two planets, including water content, grain size, oxygen fugacity, and/or temperature. Isolating the role of water from other parameters is key to quantifying Mars’ deep water reservoir and provides new constraints on the volatile inventory and interior evolution of the red planet.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evidence for weak seismic attenuation in Mars’ deep mantle

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月13日

查看全文
  • Jiaqi Li,
  • Junlin Hua,
  • Thomas P. Ferrand,
  • Laurent Pou,
  • Quancheng Huang,
  • Laetitia Allibert,
  • Haoran Meng,
  • Henri Samuel,
  • Zhicheng Jing,
  • Wenzhong Wang,
  • Ting Yang,
  • Tong Zhou

摘要

The present-day distribution of surface and subsurface water on Mars reflects a complex history of exchange between the planet’s surface and interior since its formation. Constraining the water content of the deep mantle is essential for estimating the planet’s total water budget and understanding its long-term geologic and hydrologic evolution. Yet, the abundance of water at depth remains loosely constrained. Here, we analyze seismic data from global tectonic marsquakes and meteorite impacts recorded by the InSight mission, and identify evidence for weaker attenuation in Mars’ deep mantle (500–1500 km), in contrast to Earth. This low attenuation likely reflects fundamental differences in mantle properties between the two planets, including water content, grain size, oxygen fugacity, and/or temperature. Isolating the role of water from other parameters is key to quantifying Mars’ deep water reservoir and provides new constraints on the volatile inventory and interior evolution of the red planet.