Jezero crater is the landing site for the Mars 2020 Perseverance rover. The Noachian‐aged crater has undergone several periods of fluvial and lacustrine activity and phyllosilicate‐ and carbonate‐bearing rocks were formed and emplaced as a result. It also contains a portion of the regional Nili Fossae olivine‐carbonate unit. In this work, we performed spectral mixture analysis of visible/near‐infrared hyperspectral imagery over Jezero. We modeled carbonate abundances up to ∼35% and identified three distinct units containing different carbonate phases. Our work also shows that the olivine in Jezero is predominantly restricted to aeolian deposits overlying the carbonate rocks. The diversity of carbonate phases in Jezero points to multiple periods of carbonate formation under varying conditions.

中文翻译：

---

火星杰泽罗陨石坑的独特碳酸盐岩性


Jezero 陨石坑是火星 2020 毅力号火星车的着陆点。诺亚时代的陨石坑经历了几个时期的河流和湖泊活动，最终形成并侵占了含页硅酸盐和碳酸盐岩。它还包含区域 Nili Fossae 橄榄石碳酸盐单元的一部分。在这项工作中，我们对 Jezero 上的可见/近红外高光谱图像进行了光谱混合分析。我们模拟了高达 ~35% 的碳酸盐丰度，并确定了包含不同碳酸盐相的三个不同单元。我们的工作还表明，杰泽罗的橄榄石主要局限于碳酸盐岩之上的风成沉积物。 Jezero 碳酸盐岩相的多样性表明碳酸盐岩在不同条件下形成了多个时期。