space-weathering as well as shock effects can darken meteorite and asteroid reflectance spectra. We present a detailed comparative study on shock-darkening and space-weathering using different lithologies of the Chelyabinsk LL5 chondrite. Compared to space-weathering, the shock processes do not cause significant spectral slope changes and are more efficient in attenuating the orthopyroxene 2 μ m absorption band. This results in a distinct shock vector in the reflectance spectra principal component analysis, moving the shocked silicate-rich Chelyabinsk spectra from the S-complex space into the C/X complex. In contrast to this, the space-weathering vector stays within the S complex, moving from Q type to S type. Moreover, the 2 μ m to 1 μ m band depth ratio (BDR) as well as the 2 μ m to 1 μ m band area ratio (BAR) are not appreciably affected by shock-darkening or shock melting. space-weathering, however, causes significant shifts in both BDR a...

中文翻译：

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普通球粒陨石反射光谱的冲击衰减与空间风化趋势的判别

空间风化以及冲击效应会使陨石和小行星反射光谱变暗。我们提出了使用车里雅宾斯克LL5球粒陨石的不同岩性进行的冲击衰减和空间风化的详细比较研究。与空间风化相比，冲击过程不会引起显着的光谱斜率变化，并且在衰减2P的邻二甲苯中吸收带方面更为有效。这在反射光谱主成分分析中产生了一个独特的激波矢量，将富含硅酸盐的车里雅宾斯克激波光谱从S络合物空间移至C / X络合物。与此相反，空间风化矢量保持在S复合体内，从Q型变为S型。此外，2μm至1μm的带深比（BDR）以及2μm至1μm的带深比（BAR）不受冲击变暗或冲击融化的影响。但是，太空天气会导致BDR和ADR发生重大变化。