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隶属于塔里木板块东北缘的甘肃北山草呼勒哈德地区，出露大量前人所划的“勒巴泉群”（Ｓ１—Ｓ２）地层。依据１∶２５ 万马鬃山幅区调资料和前人成果，从“勒巴泉群”中解体出前长城系敦煌岩群（ＡｎＣｈＤ），并通过讨论变质火山岩的岩石地球化学特征，首次证实塔里木板块东北缘在早元古代属不成熟岛弧及活动陆缘构造环境。
Belonging to the northeastern edge of the Tarim plate Gansu Beilshan Hulei Hade area, exposed a large number of predecessors designated “Le Baquan group” (S1-S2) strata. Based on the data of 1: 25 000 Mazong mountain ranges and the achievements of predecessors, the former Great Wall Member Dunhuang Rock Group (AnChD) was disintegrated from the “Lebaquan Group” and by discussing the petrogeochemical characteristics of the metamorphic volcanic rocks, it was first confirmed that the Tarim plate The northeast margin of the Early Proterozoic is an immature island arc and active continental margin tectonic environment.