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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Modal mineralogic distribution in the regolith at Apollo landing sites
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Modal mineralogic distribution in the regolith at Apollo landing sites

机译：阿波罗登陆点重生岩中的模态矿物学分布

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We have reduced published petrographic data on 90 surface soils from Apollo sample return sites in terms of olivine, pyroxene, plagioclase, and opaques (mostly ilmenite) for a "best estimate". To do so, we have recast the best estimates of modal mineralogy of mare and highland lithic fragments to add to the monomineralic population of soils, We have assumed that agglutinates and regolith breccias mimic those of local soils. We have thus arrived at a working summary of mineral distribution in areas traversed by Apollo astronauts. In addition, we have proportioned these averages to geologic units in the premission maps to estimate the average mineral composition of areas up to 30 km x 30 km around the landing sites. The calibration and testing of remote sensing signals for planetary exploration depend largely on the ground truth provided by lunar samples. Chemical compositions and the modal distribution of petrologic constituents of most lunar soils are known. These can be grouped spatially to represent areas that coincide with pixels of remote sensing observations and measurements. Signals from certain petrographic constituents such as lithic fragments, breccias, and agglutinates, however, are understandably ambiguous. Petrologic inference from remote sensing signals would be facilitated if petrographic data from actual samples were to be reduced and expressed as sums of single phases occurring in each pixel of observation. [References: 55]
机译：我们以橄榄石，辉石，斜长石和不透明物质（主要是钛铁矿）为依据，对来自阿波罗样品返回站点的90种表层土壤的已出版岩石学数据进行了“最佳估计”。为此，我们重铸了母马和高地石块碎片模态矿物学的最佳估计值，以添加到单矿物土壤中。我们假设凝集物和重新碎屑角砾岩模拟了当地土壤的凝块和角砾岩角砾岩。因此，我们得出了阿波罗宇航员穿越的地区的矿物分布的工作总结。此外，我们已将这些平均值与优先权地图中的地质单位成比例，以估算着陆点周围30 km x 30 km以下区域的平均矿物成分。用于行星探测的遥感信号的校准和测试在很大程度上取决于月球样品提供的地面真相。大多数月球土壤的化学组成和岩石成分的模式分布是已知的。这些可以在空间上分组以表示与遥感观测和测量的像素重合的区域。可以理解的是，某些岩性成分（例如石块，角砾岩和凝集物）发出的信号是模棱两可的。如果要减少来自实际样品​​的岩石学数据并将其表示为在每个观测像素中出现的单相总和，将有助于从遥感信号进行岩石推断。 [参考：55]

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