新疆天山斑岩铜钼矿地质特征、时空分布及其成矿地球动力学演化

Geology,Time—Space Distribution and Metallogenic Geodynamic Evolution of Porphyry Copper (Molybdenum) Deposits in the Tianshan Mountains

在前人研究成果的基础上,笔者等通过对新疆天山斑岩铜钼矿床(点)野外观察和室内岩矿测试分析,全面总结整个新疆天山斑岩铜钼矿地质特征和时空分布规律。通过对新疆天山斑岩铜钼矿成矿地球动力学演化探讨,认为西天山地区的喇嘛苏中型铜锌矿、达巴特小型铜钼矿、冬吐劲小型铜钼矿、莱历思高尔小型铜钼矿和肯登高尔小型铜钼矿分布在别珍套—科古琴晚古生代岛弧带,其成矿作用主要与晚古生代巴音沟洋板块向南俯冲作用有关;东天山地区的土屋—延东大型铜钼矿、灵龙小型铜钼矿和赤湖小型铜钼矿分布在大南湖—头苏泉晚古生代岛弧带,成矿作用主要与晚古生代康古尔塔格洋板块向北俯冲作用有关。三岔口小型铜钼矿和白山中型钼铼矿尽管分布在阿奇山—雅满苏晚古生代岛弧带,但其成矿作用分别与二叠纪和三叠纪的板内伸展—岩浆活化作用有关。

Based on some fieldwork and previous geochemical analyses, the geology, time space distribution and metallogenic geodynamics of porphyry copper （molybdenum） deposits （occurrences） in the Tianshan Mountains are described briefly. According to the geodynamic evolution of the porphyry copper （molybdenum） deposits in the Tianshan Mountains, the Lamasu copper--zinc deposit, Dabate copper molybdenum deposit, Dongtujing copper--molybdenum deposit, Lailisigao＇er copper--molybdenum deposit and Kendengga＆er copper-- molybdenum deposit in the western Tianshan Mountains occur in the Late Paleozoic Biezhentao Kokirqin arc island, and their metallogenesis is associated with the southward subduction of the Bayan Gol oceanic plate during the Late Paleozoic. The Tuwu--Yandong, Linglong and Chihu copper--molybdenum deposits develop along the Late Paleozoic Dananhu--Tousuquan arc island, and their metallogenesis is associated with the northward subduction of the Kanggurtag oceanic plate during the Late Paleozoic. Although the Sanchakou copper molybdenum deposit and Baishan molybdenum deposit appear in the Late Paleozoic Aqishan Yamansu arc island, their metallogenesis is mainly associated with the intraplate extension and magmatic activation during the Permian and Triassic respectively.