摘要
板多铅锌矿位于冈底斯成矿带东段。区内出露大面积的白垩纪中酸性岩浆岩及前奥陶系岔萨岗岩组变质岩,主要发育东西向断裂构造,次级北西、北东向构造纵横交错。矿体赋存于花岗闪长岩及石英片岩中,呈脉状,严格受次级断裂破碎带及层间破碎带控制,沿岩体周边分布。矿石以浸染状、致密块状、条带状为主,围岩蚀变主要表现为硅化、黄铁矿化。研究认为,区内铅锌矿化与酸性岩浆侵入演化、热动力变质作用有关,铅锌矿床属于中低温岩浆热液充填成因。
The Banduo Pb-Zn deposit is located at the east of Gangdise metallogenic belt. The Cretaceous intermediate and acid magmatic intrusion and metamorphic rock of the Pre-Ordovician Chasagang Formation are exposed in the studied region. Transversal fractures and secondary NW- and NE-trending structure are well developed. The Pb-Zn deposit occurs as veins in granodiorite and quartz schist and is controlled by fractured zone. The Pb-Zn ore has disseminated massive and banded structures. Silicification and pyritization are developed in wall rock. The study indicates that the Pb-Zn mineralization is related acid magmatism and dynamic metamorphism and the deposit is mesothermal and epithermal filline in origin.
出处
《四川地质学报》
2017年第2期218-222,共5页
Acta Geologica Sichuan
关键词
铅锌矿
成矿规律
找矿方向
板多
Pb-Zn deposit
metallogeny
range of reconnaissance
Banduo
