We measured the multispectral images and a hyperspectral profile during the first dissection pass of core 73002, and here, we present preliminary results. Both multispectral images and hyperspectral data show systematic darkening and reddening from bottom to top of the core, indicating an increasing maturity from the subsurface to surface soils. Our estimated FeO and TiO₂ abundances are 9 (±1) wt% and 1.8 (±0.5) wt%, and their homogeneous distributions imply no compositional stratigraphy was sampled by core 73002. The in situ regolith reworking depth is about 14 cm as inferred from the optical maturity (OMAT) profile, corresponding to a time range of about 61 million years. Mineralogy and Mg# (molar Mg/[Mg+Fe]) calculated using hyperspectral data and radiative transfer modeling show as expected the core is dominated by plagioclase and low-Ca pyroxene, and the average Mg# is 61 (±10). Our work shows that spectroscopy has a great potential to be applied in the preliminary examination of future extraterrestrial samples from outside of the glovebox.

中文翻译：

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73002 核心第一次解剖的多光谱成像和高光谱扫描：初步结果

我们在核心 73002 的第一次解剖过程中测量了多光谱图像和高光谱轮廓，在这里，我们提供了初步结果。多光谱图像和高光谱数据都显示从核心底部到顶部系统性变暗和变红，表明从地下到表层土壤的成熟度不断提高。我们估计的 FeO 和 TiO ₂丰度分别为 9 (±1) wt% 和 1.8 (±0.5) wt%，它们的均匀分布意味着岩心 73002 未对成分地层进行采样。根据光学成熟度 (OMAT) 推断，原位风化层再加工深度约为 14 cm ) 剖面，对应的时间范围约为 6100 万年。使用高光谱数据和辐射传输模型计算的矿物学和 Mg#（摩尔 Mg/[Mg+Fe]）显示，正如预期的那样，岩心以斜长石和低钙辉石为主，平均 Mg# 为 61 (±10)。我们的工作表明，光谱学具有巨大的潜力，可用于对未来来自手套箱外的外星样本进行初步检查。