| 李兆龙,许文斗,秦敏琪,庞文忠.辽宁五龙金矿地质特征及矿床成因[J].地质找矿论丛,1987,(3):31-39 |
| 辽宁五龙金矿地质特征及矿床成因 |
| GEOLOGICAL CHARACTERISTICS AND ORE GENESIS OF WULONG GOLD DEPOSITS, LIAONING PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1987.3. 004 |
| 中文关键词: 辽宁五龙 金矿床 地球化学 矿物包裹体 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 五龙金矿是产在辽河群地层中的含金石英脉型金矿床.通过矿床产出地质特征、矿物组合、微量元素地球化学、稳定同位素及矿物包体学研究,探讨了金矿与燕山期岩浆活动的成因联系. |
| 英文摘要: |
| Wulong gold deposits are distributed in the Precambrian granites gneiss and closely associated with the Jurassic granite. The research work has been done on the ore mineral association and the distribution of minor elements in individual minerarls. Co/Ni value in sulfide ranges from 0.41 to 18.57, with mean value of 5.05.The homogenization temperature of the gas-liquid inclusions in the quartz of the vein ranges from 190℃ to 330℃. The compositions of the liquid and trace gases of the inclusions show the characteristics of Cl-1-F-1-SO4-2, Na+1-K+1-Ca+2. The ore-forming solution is weak acid.Sulfur isotopic composition of ores is similar to magmatic hydrothermal deposits. The δ34S value ranges from 0.9‰ to 3.5‰. Lead isotopic composition in the deposits is relative stable. All of them belong to the ordinary lead type. Most of the calculated model ages range from 719 to 847 Ma. The 238U/204Pb and Th/U ratios for the provenace of the lead comes from the upper crust, while a little comes from the lower crust or the upper mantle.In terms of the transecting relationship of quartz vein and dike, the age of formation of the gold deposits is between 117-52 Ma.According to the above data, the authers suggest that the gold deposits belong to the magmatic hydrothermal deposits of gold-bearing quartz vein that closely associated with the Jurassic granites. |
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