湖南黄沙坪铅锌多金属矿床位于我国南岭构造带中段北缘,骑田岭—千里山多金属矿集区西侧,系南岭成矿带与钦杭成矿带叠加区的一个重要的矿床.在综合其成矿地质背景、矿物共生组合和成矿期次等因素的基础上,重点对黄沙坪矿床Cu-Pb-Zn和 W-Mo-Pb-Zn两套矽卡岩成矿系统中闪锌矿元素地球化学特征进行分析反演,推断闪锌矿中存在 Fe2+→Zn2+的替换模式,确定该矿床成矿温度为中高温(252℃～261℃),成矿硫逸度条件为中—低硫逸度,综合判断两套成矿系统的成矿环境有所差异,为黄沙坪矿床叠加成矿机制提供新的依据.

The absorption coefficients of different energy gamma-ray on the two types of nickel alloy and lead are measured by BH1324 and BH1220 devices.The experimental results show that the mass-absorption coefficient of nickel alloy decreases slowly with the increase of gamma-ray energy,and the values are close to these of lead in the higher energy region.So nickel alloys are suitable to replace lead as the shielding materials for gamma rays.