摘要
肃北县土达坂铅锌矿地处祁连造山带与敦煌地块的交接部位,太古宙—古元古代敦煌岩群第二岩组第二岩段是其主要赋存层位。构造和地层是控制土达坂铅锌矿形成的重要因素,其中EW向断裂构造是主要次级控矿构造。Pb元素的富集主要与敦煌岩群有关,而Zn元素可能不但受控于敦煌岩群,而且还叠加了后期花岗质伟晶岩浆热液的影响。敦煌岩群第二岩组第二岩段、蚀变断裂破碎带、地表呈黄色的黄钾铁矾带和铁冒是土达坂铅锌矿的重要找矿标志。
Tudaban Pb-Zn deposit is located in the transition between Qilian orogen and Dunhuang block, and hosted at the 2nd member of the 2nd formation, Archean-Proterozoic Dunhuang group. The structure and strata are two key factors in the formation of deposit. The EW-orientated fault zone is a major control of mineralization. Pb~ concentration is closely related to Dunhuang group, Zn also has been overlapped by post granite hydrotherm. The import ore-finding indexes include the 2nd member of the 2nd formation, Dunhuang group, altered fracture zone, yellow jarosite zone on surface and gossan.
出处
《资源与产业》
北大核心
2009年第4期96-98,共3页
Resources & Industries
基金
中国地质调查局矿产地质调查项目
关键词
敦煌岩群
土达坂铅锌矿
地质特征
找矿标志
肃北县
Dunhuang group
Tudaban Pb-Zn deposit
geological characteristics
ore-finding indexes
Subei county
