中文摘要：

在阿尔泰山 orogen 的 pelitic granulite 的存在被详细 petrographic 研究和当模特儿的磅假节第一次证实。pelitic granulite 与包含堇青石 + 尖晶石的同等发育不全的一些样品有石榴石 + 堇青石 +K 长石 + 黑云母 + 矽线石 + 斜长石 + 石英的集合。从磅假节决定的 pelitic granulite 的山峰条件包含了 P = 0.5 −0.6 GPa， T = 780 −800 ° C，属于媒介 -- 到低压的类型。锆石标明日期的虾 U-Pb 介绍了 292.8 ±的变形年龄 2.3 妈。pelitic granulite 的发现反映前有在阿尔泰山 orogen 的南部的边缘的高热流动的紧张的环境在期间早二叠，它在阿尔泰山 orogen 的进化上提供重要 petrological 限制。

英文摘要：

The existence of pelitic granulite in the Altai orogen was confirmed for the first time by detailed petrographic research and P-Tpseudosection modeling. The pelitic granulite has the assemblage of garnet ＋ cordierite ＋ K-feldspar ＋ biotite ＋ sillimanite ＋ plagioclase ＋ quartz with some samples containing the paragenesis of cordierite ＋ spinel. Peak conditions of the pelitic granuUte determined from the P-T pseudosection involved P = 0.5-0.6 GPa, T= 780-800℃ belonging to medium- to low-pressure type. SHRIMP U-Pb dating of zircon presented a metamorphic age of 292.8 ± 2.3 Ma. The discovery of pelitic granulite reflects an extensional environment with high heat flow in the southern margin of the Altai orogen during the Early Permian, which provides an important petrological constraint on the evolution of the Altai orogen.