| 吉林红旗岭铜镍硫化物矿床的成矿时代讨论 |
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| 引用本文：.2005.Discussion on metallogenic epoch of Hongqiling Cu_Ni sulfide deposit, Jilin Province[J].Mineral Deposits,24(5):521~526 |
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| 中文摘要:通过对红旗岭铜镍硫化物矿床1号含矿超镁铁质岩体和8号不含矿镁铁-超镁铁质岩体进行单矿物40Ar-39Ar法测年，得到与铜镍硫化物矿床相关的角闪石与黑云母结晶年龄分别为250 Ma和225 Ma，这一结果与前人所报道的K-Ar法年龄有明显的差异。结合与热液矿化相关的斜长伟晶岩锆石SHRIMP法年龄216 Ma，认为镁铁-超镁铁质岩形成于250 Ma左右的印支早期，铜镍硫化物矿床的形成时间晚于含矿岩体，大约为225 Ma前后的印支中期。216 Ma前后的岩浆期后热液叠加对成矿具有积极作用。 |
| 中文关键词:地球化学 成矿年龄 印支期 铜镍硫化物矿床 红旗岭 吉林 |
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| Discussion on metallogenic epoch of Hongqiling Cu_Ni sulfide deposit, Jilin Province |
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| Abstract:40Ar-39Ar isotope dating of No.1 ore_bearing intrusion and No.8 barren intrusion in Hongqiling area indicates that mafic_ultramafic intrusions associated with Cu_Ni sulfide deposits were formed at 250 Ma. This conclusion is different from the K_Ar age reported by previous researchers. In combination with a zircon Pb_U SHRIMP age of (216±5) Ma for anorthositic pegmatite associated with hydrothermal mineralization, it is concluded that the mafic_ultramafic intrusions were solidified at 250 Ma in company with the early Indosinian orogeny, that the main mineralization took place at 225 Ma, and that hydrothermal superimposition at 216 Ma played an active role in the formation of the Cu_Ni sulfide deposit. |
| keywords:geochemistry, ore_forming age, Indosinian orogeny, Cu-Ni sulfide deposit, Hongqiling, Jilin Province |
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