Zastrow Allison M, Glotch Timothy D
Stony Brook University Stony Brook NY USA.
Geophys Res Lett. 2021 May 16;48(9):e2020GL092365. doi: 10.1029/2020GL092365. Epub 2021 May 6.
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.
杰泽罗陨石坑是2020年“毅力号”火星车的着陆点。这个诺亚纪时期的陨石坑经历了多个河流和湖泊活动阶段，形成并沉积了含页硅酸盐和碳酸盐的岩石。它还包含区域尼利福萨橄榄石-碳酸盐单元的一部分。在这项工作中，我们对杰泽罗地区的可见/近红外高光谱图像进行了光谱混合分析。我们模拟出碳酸盐丰度高达约35%，并识别出三个含有不同碳酸盐相的不同单元。我们的研究还表明，杰泽罗的橄榄石主要局限于碳酸盐岩之上的风成沉积物中。杰泽罗碳酸盐相的多样性表明在不同条件下经历了多个碳酸盐形成阶段。
