近日，日本广岛大学Ikuo Katayama和Yuya Akamatsu最新研究提出，火星地壳的地震不连续可能是由充满水的裂缝引起的。相关论文发表在2024年9月24日出版的《地质学》杂志上。

据介绍，洞察号着陆器最近获得的地震数据显示，火星地壳中存在地震不连续性的现象，被解释为孔隙度或化学成分的急剧变化。

研究人员提出了一个替代模型，其中从干裂缝到充满水的裂缝的过渡可以解释，在火星火山口观测到的地震不连续。该模型可以解释在约10km深度的地震速度和Vp/Vs的急剧增加，而没有孔隙度或化学成分相关的变化。目前的模型表明，火星地壳中存在液态水，这可能是潜在的生命地下栖息地。

附：英文原文

Title: Seismic discontinuity in the Martian crust possibly caused by water-filled cracks

Author: Ikuo Katayama, Yuya Akamatsu

Issue&Volume: 2024-09-24

Abstract: Recent seismic data acquired by the InSight lander have revealed seismic discontinuities in the Martian crust that have been interpreted as sharp transitions in porosity or chemical composition. Here we propose an alternative model in which the transition from dry cracks to water-filled cracks could explain the observed seismic discontinuity in the Martian crust. Our model can explain sharp increases in seismic velocity and Vp/Vs at ～10 km depth with no associated changes in porosity or chemical composition. The present model suggests the local existence of liquid water in the Martian crust, which could potentially serve as a subsurface habitat for life.

DOI: 10.1130/G52369.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G52369.1/648640/Seismic-discontinuity-in-the-Martian-crust