Abstract The vast majority of the studied samples of the Chelyabinsk LL5 meteorite shower is represented by the light, dark and impact melt lithologies. Their regular relative positions were revealed in the sections of the large fragments of the Chelyabinsk meteorite. Thus, the zones of light lithology are surrounded by the zones of dark lithology and they both are located within the impact melt. In the present study, we compare the breccia texture of large samples with the lithology zones formed after shock experiment. It was shown that during the spherical shock experiment performed using the light lithology material of the Chelyabinsk meteorite, the gradient of P-T conditions was realized so that dark lithology, mixed lithology, and impact melt were formed within one shock experiment. In the present study, we focus on structural changes associated with metal and troilite. The formation mechanism of the breccia texture in the large fragments of the Chelyabinsk meteoroid was proposed.

中文翻译：

---

车里雅宾斯克陨石在冲击实验中的撞击后变质作用

摘要 车里雅宾斯克LL5陨石雨的研究样本绝大多数以浅色、深色和撞击熔体岩性为代表。它们规则的相对位置在车里雅宾斯克陨石的大块碎片中得到了揭示。因此，浅岩性区域被深色岩性区域包围，并且它们都位于撞击熔体内。在本研究中，我们将大样本的角砾岩结构与冲击实验后形成的岩性带进行了比较。结果表明，在利用车里雅宾斯克陨石轻质岩性材料进行球形冲击实验时，实现了PT条件的梯度，从而在一次冲击实验中形成了暗岩性、混合岩性和冲击熔体。在目前的研究中，我们专注于与金属和陨硫石相关的结构变化。提出了车里雅宾斯克流星体大碎片角砾岩结构的形成机制。