西藏查个勒铅锌矿床成矿时代研究及地质意义

基金项目: 国家重点基础研究发展计划（2011CB403100）和青藏专项 (1212011121239)联合资助。

Geochronology of the Chagele Pb-Zn deposit in Tibet and its significance

1.
Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China
2.
Tibet Bureau of Geology and Mineral Resource Exploration, Lhasa 850000, Tibet, China

摘要: 提要：查个勒铅锌矿位于冈底斯—念青唐古拉成矿带西段。矿体受花岗斑岩岩体形态及北东向、北西向断裂控制，产于岩体接触带与断裂破碎带中，属于典型的矽卡岩型矿床。花岗斑岩的锆石ICP-MS U-Pb年龄加权平均值为（63.18±0.77）Ma，岩石具有重熔型花岗岩地球化学特征，形成于碰撞环境。初步研究表明，查个勒铅锌矿床的形成与印—亚大陆碰撞有关，形成于印度大陆陡俯冲的主碰撞阶段。
- 查个勒 /
- 冈底斯—念青唐古拉成矿带 /
- 铅锌 /
- 矽卡岩矿床
Abstract: Abstract：The Chagele Pb-Zn deposit is located in western Gandise-Nyainqentanglha metallogenic belt. Ore bodies are produced in the contact zone and rock fracture zones and controlled by the shape of granite porphyry and NE-NW trending faults, suggesting a typical skarn deposit. Zircon ICP-MS U-Pb weighted average age of granite porphyry is 63.18Ma ± 0.77Ma, and the geochemical characteristics of the rocks indicate melting-type granite formed in the collision environment. Preliminary studies show that the Chagele Pb-Zn deposit was genetically related to the collision of India–Asia continent and was formed at the main collision stage of steep subduction of Indian continent.
- Chagele /
- Gandise-Nyainqentanglha metallogenic belt /
- Pb-Zn /
- skarn deposit