09:15 〜 09:30
[PPS08-02] SLIMマルチバンドカメラの月面観測―月・地球岩石サンプルの岩石組織観察との比較・評価―
キーワード：その場観測、岩石組織、鉱物、SLIM
Japan's first lunar lander, SLIM (Smart Lander for Investigating Moon) was launched on September 7, 2023, with a plan to demonstrate high-precision landing technology necessary for lunar and planetary exploration using a small probe. It successfully made a pinpoint landing on the moon's surface on January 20th. The scientific observation device MBC (Multi-Band Camera) was installed on SLIM to investigate the composition of mantle-derived olivine (Yamamoto et al. 2010, Nature Geoscience), which was discovered by the lunar orbiting satellite "Kaguya".
When the Moon was formed, it is thought that the entire planet experienced the differentiation of the crust and mantle from a magma ocean, and the mantle material is thought to be composed of a rock enriched in olivine (e.g., Elkins-Tanton et al. 2011, EPSL). The olivine discovered by Kaguya around the large impact basin can be interpreted as being exposed to the surface layer as a result of excavation of mantle material located deeper by large meteorite impacts (Yamamoto et al. 2010). MBC has a high spatial resolution of 1.1 mm/pixel at a distance of 10 m, and uses 10 band pass filters (750, 920, 950, 970, 1000, 1050, 1100, 1250, 1550, and 1650 nm) to investigate the lunar surface rocks. MBC identifies the mineral species contained in the rock, and in particular determines the chemical composition of olivine, Mg# (= molar Mg/(Mg+Fe)), and compares the obtained data with the Earth's mantle composition. is the purpose of observation.
In order to compare the mineral types and composition of rock bodies determined by analysis of imaging data obtained on the lunar surface, we used an engineering model (EM) that has almost the same performance as the MBC on board SLIM. Images were taken of meteorites and rocks on the earth. The main mineral types (pyroxene, olivine, plagioclase) were classified from the image data of 10 bands obtained from the nearest image focus (distance of about 1 m to the imaging target), and the rock types were determined. In this presentation, we will report the observation results obtained using MBC-EM on lunar meteorites and Earth rocks, discuss the evaluation results of rock texture and mineral types, and reflect them in the results and interpretations of lunar surface observation for Labrador among 10 rocks observed by MBC.
When the Moon was formed, it is thought that the entire planet experienced the differentiation of the crust and mantle from a magma ocean, and the mantle material is thought to be composed of a rock enriched in olivine (e.g., Elkins-Tanton et al. 2011, EPSL). The olivine discovered by Kaguya around the large impact basin can be interpreted as being exposed to the surface layer as a result of excavation of mantle material located deeper by large meteorite impacts (Yamamoto et al. 2010). MBC has a high spatial resolution of 1.1 mm/pixel at a distance of 10 m, and uses 10 band pass filters (750, 920, 950, 970, 1000, 1050, 1100, 1250, 1550, and 1650 nm) to investigate the lunar surface rocks. MBC identifies the mineral species contained in the rock, and in particular determines the chemical composition of olivine, Mg# (= molar Mg/(Mg+Fe)), and compares the obtained data with the Earth's mantle composition. is the purpose of observation.
In order to compare the mineral types and composition of rock bodies determined by analysis of imaging data obtained on the lunar surface, we used an engineering model (EM) that has almost the same performance as the MBC on board SLIM. Images were taken of meteorites and rocks on the earth. The main mineral types (pyroxene, olivine, plagioclase) were classified from the image data of 10 bands obtained from the nearest image focus (distance of about 1 m to the imaging target), and the rock types were determined. In this presentation, we will report the observation results obtained using MBC-EM on lunar meteorites and Earth rocks, discuss the evaluation results of rock texture and mineral types, and reflect them in the results and interpretations of lunar surface observation for Labrador among 10 rocks observed by MBC.