摘要
安徽庐江泥河铁矿床位于长江中下游成矿带庐枞中生代火山岩盆地，为一典型的玢岩型铁矿床。本文在详细野外调研的基础上，开展了泥河铁矿床各个成矿阶段流体包裹体测温工作，明确磁铁矿黄铁矿化阶段流体均一温度集中在330～370℃之间；石英碳酸盐黄铁矿化阶段流体均一温度集中在260～295℃之间；石英黄铁矿化阶段流体均一温度集中在205～250℃之间；脉状碳酸盐硫酸盐阶段流体均一温度集中在140～190℃之间。利用包裹体均一及冰点温度算得流体盐度集中在6％～12％之间，密度集中在0．70～0．8g／cm^3之间，属于中盐度中低密度流体。结合前人的研究工作，对泥河铁矿床的成矿作用过程及流体演化进行了初步的探讨。
Nihe iron deposit which can be classified into porphyry-like type iron deposit is locating in Luzong Mesozoic volcanic basin of Middle-lower Yangtze metallogenic belt. In this paper we carry systematic researches on the fluid inclusions of Nihe iron deposit. According to the results, the average homogenization temperature of fluid inclusions in magnetite-pyrite stage, quartz-carbonatite-pyrite stage, quartz-pyrite, vein-type carbonatitesulfate-stage are 330-370℃, 260-295℃, 205-250℃, 140-190℃. The salinity and density of the ore-forming fluids are 6%-12% NaCleqv and 0.70-0.8g/cm^3. The metallogenic mechanism and ore-forming fluids evolution have been discussed in this paper.
出处
《安徽地质》
2016年第4期260-263,共4页
Geology of Anhui
基金
中国地质调查局项目(12120114038001
1212011120862)的资助成果
关键词
泥河铁矿床
流体包裹体
玢岩型铁矿床
庐枞盆地
Nihe iron deposit
fluid inclusions
porphyry-like type iron deposit
Luzong basin
