湖北花椒树坪锌矿床同位素地球化学特征

Geochemical Feature of Zinc Deposit Isotope in Huajiaoshuping,Hubei Province

花椒树坪锌矿床是在新一轮国土资源大调查中发现的大型锌矿床,矿体严格受层位控制,呈似层状、透镜状产出,矿石矿物简单,有用组分以Zn为主,局部含Pb,伴生有用组分Ag、S、Cd。通过对现有同位素资料的分析,硫同位素特征表明其成矿处于封闭的海相硫酸盐热还原作用环境;碳、氧同位素特征分析结果,推测碳酸盐化的热液应是本地区地层中碳酸盐岩矿物溶解形成,应属于盆地流体系统;铅同位素特征揭示区内矿质来源于造山带和上地幔,其成矿作用可能与秦岭微板块的构造活动有关,其成矿时代不晚于加里东期。

It is a large zinc deposit of Huajiaoshuping that discovered by a new turn territory resources survey.Its ore body outputs ore minerals on the form of stratiform-like and lenticular,which controlled by horizon strictly.The zinc deposit holds simple ore minerals such as useful components Zn in main,Pb in local,associated useful components Ag,S,Cd.This deposit reaches to a large scale.Through the analysis on present isotope information,the feature of sulfur isotope indicated that it s ore-forming placed on hot reduction environment of closed marine sulfate. Based on the analysis of carbon, oxygen isotope, the tion in this horizon and this area stemmed from activity of Qinling plate authors predicted that carbonation hydrothermal should has formed by carbonate mineral dissolubelonged to basin fluids system. The characteristics of lead isotope revealed that the mineral in orogenic belt and upper mantle. The ore-forming process of the mineral probably referred to the tectonic, and its metallogenic epoch was not late to Caledonian.