论文标题
Nili Fossae橄榄石 - 粘碳酸盐岩石岩石学的特性：轨道和原地在Séítah
Properties of the Nili Fossae Olivine-clay-carbonate lithology: orbital and in situ at Séítah
论文作者
论文摘要
We examine the observed properties of the Nili Fossae olivine-clay-carbonate lithology from orbital data and in situ by the Mars 2020 rover at the Séítah unit in Jezero crater, including: 1) composition (Liu, 2022) 2) grain size (Tice, 2022) 3) inferred viscosity (calculated based on geochemistry collected by SuperCam (Wiens, 2022））。基于单元的低粘度和分布，我们假设Séítah的橄榄石 - 钙碳酸盐岩岩起源。我们包括一个新的CRISM图2.38μm频带，并使用原位数据，以表明Séítah地层中橄榄石累积的粘土与来自Mars 2020 Supercam Libs，Visir和Visir和MastCAM-Z观测值的滑石或蛇纹石一致。我们讨论了岩性历史的两个相互交织的方面：1）基于西澳大利亚州皮尔巴拉（Pilbara）的陆地类似物，以及使用先前发表的洪水熔岩和熔岩湖的模型，以及2）clay和碳酸盐变化的范围有限，包括粘土和碳酸盐变化（包括20222222222）2； 20222222.222222222222.
We examine the observed properties of the Nili Fossae olivine-clay-carbonate lithology from orbital data and in situ by the Mars 2020 rover at the Séítah unit in Jezero crater, including: 1) composition (Liu, 2022) 2) grain size (Tice, 2022) 3) inferred viscosity (calculated based on geochemistry collected by SuperCam (Wiens, 2022)). Based on the low viscosity and distribution of the unit we postulate a flood lava origin for the olivine-clay-carbonate at Séítah. We include a new CRISM map of the clay 2.38 μm band and use in situ data to show that the clay in the olivine cumulate in the Séítah formation is consistent with talc or serpentine from Mars 2020 SuperCam LIBS and VISIR and MastCam-Z observations. We discuss two intertwining aspects of the history of the lithology: 1) the emplacement and properties of the cumulate layer within a lava lake, based on terrestrial analogs in the Pilbara, Western Australia, and using previously published models of flood lavas and lava lakes, and 2) the limited extent of post emplacement alteration, including clay and carbonate alteration (Clave, 2022; Mandon, 2022).
