Distribution and controlling factors of enrichment of germanium in coal-bearing region of Northeast China
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摘要: 通过对大量煤田(矿区)勘查资料煤中锗含量化验数据的统计分析,以矿区(煤田)为统计单元,确认东北赋煤区主要矿区(煤田)煤中锗含量平均值为1~5 μg/g,均分布在中国煤锗含量平均值附近;即使在典型煤-锗矿床乌兰图嘎所在的胜利煤田和五牧场所在的伊敏煤田,统计煤中锗平均值分别为2.63 μg/g和3.30 μg/g,没有明显的升高,胜利、伊敏煤田其他井田,煤中锗含量平均值均与中国煤中锗含量平均值相差不大,煤中锗的富集表现为在小范围内聚集;煤中锗富集区域常可见热液矿物,结合前人对典型煤-锗矿床的研究,认为煤中锗主要由热液携带进入,热液侵入为煤中锗的富集提供了有利条件。本次工作在二连、海拉尔盆地新发现一批煤中锗异常点,由于煤中锗的富集通常范围较小,已有煤田勘查资料显示有未能控制到锗富集的范围,这些异常点很值得做进一步工作。Abstract: By statistical analysis of a large number of germanium content data in coal from coal exploration reports, it was confirmed that the average value of germanium in coal of coal-bearing region in Northeast China is distributed roughly in 1~5 ug/g, close to the average range of germanium content of Chinese coal, and the background of germanium content in coal is basically stable, even in the coalfields, even for the typical coal-germanium deposits located such as Ulantuga mine of Shengli coalfield and Wumuchang mine of Yimin coalfield, the germanium background value of the coal is not significantly high. The area of germanium enrichment in coal is often visible in hydrothermal minerals, combined with the previous study of the typical coal-germanium deposits, it is considered that the germanium in coal mainly come from thermal liquid, and hydrothermal intrusion provides a favorable condition for enrichment of germanium in coal. In addition, some new germanium anomalies in coal have been found in Erlian and Hailaer basins, because the enrichment of germanium in coal is usually smaller, the existing coal exploration data may not control the germanium enrichment range, these anomalies are worth further work.
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Key words:
- germanium in coal /
- distribution /
- hydrothermal /
- control factors of enrichment
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