新疆中天山北缘存在一条早古生代构造混杂岩带。在该带东段乌斯特沟和干沟混杂岩中，发现了蓝闪石类矿物和多硅白云母。经电子探针分析，蓝闪石类矿物为青铝闪石，形成时压力为６７×１０５ｋＰａ。测得多硅白云母的ｂ０值为９０４１Ａ，晶体结构式中的离子数Ｓｉ平均为３４３。这些高压矿物的发现为确定中天山北缘构造混杂岩带的变质相提供了确凿的证据，从而为研究天山造山带的构造演化和古板块的活动史提供了必要的基础资料 There is an Early Paleozoic structural melange belt on the northern margin of the Tianshan Mountains in Xinjiang. In the eastern section of the Ust ditch and the dry gully mélanges, the discovery of the amphibole minerals and polysiliciferous mica. By electron probe analysis, the glaucophane minerals are Al-Al-amphiboles, forming a pressure of 6  7 × 105kPa. The measured b0 value of piceid was 9041A, and the average number of ions Si in the crystal structure was 343. The discovery of these high-pressure minerals provides conclusive evidence for determining the metamorphic facies of the structural melange belt in the northern margin of the Tianshan Mountains, thus providing the necessary basic data for the study of the tectonic evolution of the Tianshan orogen and the history of the paleofacies