摘要
结合西藏念青唐古拉地区目前已发现的铜铅锌多金属矿床或矿(化)点的岩石学研究,并根据各岩类稀土元素的化学组成特征,进一步判断出硅质岩类、富长石岩类、夕卡岩类、富铁锰质碳酸盐岩类、硫酸盐岩类等各岩类的成岩构造环境,研究表明热水沉积岩与热水沉积成矿作用关系十分密切,认为该地区绝大多数铜铅锌矿床属"热水沉积矿床"范畴,成因上与晚古生代裂谷带发育的热水沉积岩密切相关,是旁多(林周)裂谷带扩张充填阶段最重要的成矿事件。
The paper studies petrology of 42 copper lead-zinc multi metallic deposits or point of mineralization found in the area of Nyainqentanglha in Tibet. It is found that the hot water-borne sedimentary rocks of this area are typical and diversified. According to the chemical composition of the characteristics of the rare earth elements, the paper further identifies the diagenetic tectonic setting of siliceous rocks, oligoclase rocks, Fe-Mn carbonated rocks, sulphate karst and the close relationship between the hot water-borne sedimentary rock and the hot water-borne sedimentary rock metallization. Most lead-zinc multi-metallic deposits found in the area belong to the category of hydrothermal deposits. The formation is mostly related to the hydrothermal rock developed in the rift valley in Late Paleozoic, which should be the most important mineralization event in the expanding and filling stage of PangDuo rift valley.
出处
《地质科技情报》
CAS
CSCD
北大核心
2009年第1期87-92,共6页
Geological Science and Technology Information
基金
中国地质调查局项目(1212010530103)
关键词
念青唐古拉
裂谷带
热水沉积岩
铜铅锌多金属矿床
Nyainqentanglha
rift valley zone
hot water-borne sedimentary rock
copper-lead-zinc multi metallic deposit
