The paleo-lake floor at the edge of the Jezero delta has been selected as the NASA 2020 rover landing site. In this article, we demonstrate the sequences of lake filling and delta formation and constrain the minimum life span of the Jezero paleo-lake from sedimentological and hydrological analyses. Two main phases of delta evolution can be recognized by utilizing imagery provided by the High Resolution Imaging Science Experiment (NASA Mars Reconnaissance Orbiter) and High Resolution Stereo Camera (ESA Mars Express): (1) basin infilling before the breaching of the Jezero rim and (2) the delta formation itself. Our results suggest that delta formation occurred over a minimum period of 90–550 years of hydrological activity. Breaching of the Jezero rim occurred in at least three distinct episodes, which spanned a far longer time-period than overall delta formation. This evolutionary history implies that the Jezero-lake floor would have been a haven for fine-grained sediment accumulation and hosted an active environment of significant astrobiological importance.

中文翻译：

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Jezero河流三角洲（火星）的估计最小寿命。

Jezero三角洲边缘的古湖层已被选为NASA 2020流浪者着陆点。在本文中，我们通过沉积和水文分析证明了湖泊充填和三角洲形成的顺序，并限制了杰泽罗古湖的最小寿命。通过利用高分辨率影像科学实验（NASA火星侦察轨道器）和高分辨率立体相机（ESA火星快车）提供的影像，可以认识到三角洲演化的两个主要阶段：（1）在Jezero轮缘破裂之前进行盆地充填，以及（2）三角洲本身。我们的结果表明，三角洲的形成至少发生在90-550年的水文活动期间。至少在三个不同的事件中发生了Jezero轮缘的破坏，这比整个三角洲形成的时间要长得多。这段进化史表明，杰泽罗湖底将是细颗粒沉积物的避风港，并拥有一个具有重要的生物学意义的活跃环境。