摘要
易门矿区含铜层位铜的背景值及其近矿围岩的低铜含量表明狮山和凤山两矿床的铜质均来源于狮山段地层。依据矿石及围岩的微量元素特征,氧、氢、碳同位素组成及矿物包体的均一温度、盐度及液相成分,笔者认为本区有两期成矿流体,即成岩期形成狮山层状矿,而在改造期由于构造作用形成狮山脉状矿体和凤山矿床。
The copper background value of copper-bearing beds in Yimen area and the relatively lower copper content of wall-rock in Shishan deposit show that the copper of the two deposits both come from Shishan Member. Based on the study of the trace-element features in ore and wall-rock, of oxygen-, hydrogen-and carbon-isotope composition and of the hemogeneous temperature, salinity and composition of inclutions in minerals, it is believed that there were two periods of ore-forming fluid: the early one formed the stratiform ore bodies of Shishan deposit in rock-forming period; the late one formed Fengshan depo-sit and the veintype ore bodies of Shishan deposit in reforming period because of the tectonic process.
出处
《云南地质》
1992年第1期52-57,共6页
Yunnan Geology
