Lunar spinels in the Aristarchus crater and cobra head

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Planetary and Space Science Pub Date : 2023-12-19 DOI:10.1016/j.pss.2023.105831

Yehor Surkov , Yuriy Shkuratov , Vadym Kaydash , Gorden Videen , Urs Mall , Sergey Velichko

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Abstract

On the lunar surface we identify and map Mg-spinel-bearing deposits on the southern section of the Aristarchus Plateau, including the Aristarchus and Herodotus craters and the Cobra Head using the color rations C (950-750 nm) and C (2650/1550 nm). The main concentrations of spinel-bearing material are located on the peak and floor of the Aristarchus crater, with some minor deposits also detected on the walls. Most of these deposits are associated with surface areas covered by massive boulders. The crater peak reveals a bimodality of spectral characteristics and surface types: The smooth, darker surface of the northernmost face has a strong absorption band near 1 μm that is evidence of mafic mineral presence. The brighter and rougher surface of the peak midportion reveals absorption starting from 1.55 μm. This suggests a dominant plagioclase/Mg-spinel mineralogic composition of Fe-poor minerals. The Mg-spinel deposits outside the crater are represented by a single unit located on the southern slope of the Cobra Head. The intrusive volcanism and further uplifting by the impact is discussed as a possible origin of the Mg-spinel deposits of the region.

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阿里斯塔尔丘斯环形山和眼镜蛇头中的月球尖晶石

在月球表面，我们利用 C（950-750 nm）和 C（2650/1550 nm）比色法识别并绘制了亚里士多德高原南段的含镁质尖晶石沉积物，包括亚里士多德环形山和希罗多德环形山以及眼镜蛇头。含有尖晶石的物质主要集中在阿里斯塔尔丘斯陨石坑的坑顶和坑底，在坑壁上也发现了一些小的沉积物。这些沉积物大多与巨石覆盖的表面区域有关。陨石坑顶部显示出光谱特征和表面类型的双峰性：最北面光滑、较暗的表面在 1 μm 附近有一个很强的吸收带，这是岩浆岩矿物存在的证据。峰值中间部分较明亮粗糙的表面显示出从 1.55 μm 开始的吸收。这表明贫铁矿物主要由斜长石/镁尖晶石组成。陨石坑外的镁尖晶石矿床以眼镜蛇头南坡的一个单元为代表。讨论了该地区镁尖晶石矿床的可能起源，即侵入火山作用和撞击造成的进一步隆起。

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research