| 河南卢氏石门金矿床载金矿物及微量元素特征 |
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| 引用本文： | 李金宝,李荣西,李伍平.河南卢氏石门金矿床载金矿物及微量元素特征[J].地球科学与环境学报,2003,25(4):44-47. |
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| 作者姓名： | 李金宝 李荣西 李伍平 |
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| 作者单位： | 长安大学,地球科学与国土资源学院,陕西,西安,710054 |
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| 摘 要： | 对河南卢氏石门金矿床中矿石经偏光、反光显微镜下研究,发现自然金与细脉状的黄铁矿黄铜矿脉、黄铁矿方解石脉共生;含金品位较高的烟灰色石英内分布有网脉状金属硫化物细丝以及尘埃状不透明的金属矿物,造成宏观上石英呈烟灰色至深灰色.对矿区各种载金矿物经实验室分离并进行化学分析显示细粒黄铁矿中金元素含量是粗粒黄铁矿的3.2倍,磁黄铁矿中金元素含量远高于黄铁矿,烟灰色石英中金元素含量是乳白色石英中的27.7倍.矿区分布一些石英脉中含黄铁矿非常高,结晶颗粒大,但脉体含金远低于工业品位,无开采价值,而在这种脉体的围岩中分离的黄铁矿单矿物含金可达10.5×10-6,说明这种石英脉形成温度高,使金向围岩中扩散发生贫化.
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| 关 键 词： | 细粒黄铁矿 粗粒黄铁矿 磁黄铁矿 烟灰色石英 乳白色石英 |
| 文章编号： | 1007-9955(2003)04-0044-04 |
| 修稿时间： | 2003年3月12日 |
TRACE ELEMENT CHARACTERISTICS OF GOLD-BEARING MINERALS IN THE SHIMEN GOLD DEPOSIT, LUSHI, HENAN PROVINCE |
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| LI Jin-bao,LI Rong-xi,LI Wu-ping.TRACE ELEMENT CHARACTERISTICS OF GOLD-BEARING MINERALS IN THE SHIMEN GOLD DEPOSIT, LUSHI, HENAN PROVINCE[J].Journal of Earth Sciences and Environment,2003,25(4):44-47. |
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| Authors: | LI Jin-bao LI Rong-xi LI Wu-ping |
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| Abstract: | Microscopic studies of ores in the Shimen gold deposit show that the gold was paragenic with fine pyrite and chalcopyrite veinlets and pyrite and calcite veins. Very fine linear and dust-like matal sulfides spreading in the grey quartz with higher gold grades are determined to be responsible for the grey-dark grey colour. Gold-bearing minerals are separated in the laboratory and the chemical analysis of each individual indicates that the gold grade for fine pyrites is 3.2 times higher than that for coarse ones and the grey quartz is of 27.7 times higher gold grade than the white quartz. In general, pyrrhotites are of higher gold contents than pyrites. Some quartz veins in the gold field are identified by very coarse pyrites, but low gold grades and are non-economic. However, the gold grade for the pyrites separated from the wall rock of these veins can amount to 10.5 g/t, suggesting that they were formed at higher temperature causing gold diffusion toward wall rocks. |
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| Keywords: | fine pyrites coarse pyrites pyrrhotites grey quartz white quartz |
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