热液对五牧场矿区煤中锗富集影响的探讨

Discussion on Germanium Enrichment in Coal Impacted by Hydrothermal Solution in Wumuchang Minefield

基于煤炭勘探报告、其化验数据以及煤质变化规律,推导出热液分布情况,结合煤中锗分布范围、分布形态及含量变化规律,探讨了热液对五牧场矿区煤中锗分布的影响。表明五牧场矿区煤中锗含量与热液有着密切的联系:垂向上,锗含量变化规律可以划分为与热液活动引起的煤质变化相吻合的阶梯形,表现为褐煤层的锗含量普遍较低,受热液二次富集改造,出现低变质的长焰煤,气煤等煤层出现了锗的富集;平面上看,锗元素的富集区域表现为围绕煤的变质中心呈一定规律分布,推测为热液将强变质煤中的锗元素活化,在浓度差的驱动下,在平面上横向搬运,到达受到热液弱变质但是有机质尚且丰富的长焰煤、气煤后,再次被有机质束缚,在长期热液作用下,达到富集。

Based on integrated geological exploration reports and tested data, as well as coal quality variation pattern have induced hy-drothermal solution distribution situation in the Wumuchang minefield. Combined with germanium distribution extent, configuration andcontent variation pattern in coal, discussed the impact from hydrothermal solution on germanium distribution in the area. The result hasshown that the germanium content in coal is closely connected with hydrothermal solution. Vertically, the germanium content variationpattern is showing a stepped appearance coincident with coal quality variation caused by hydrothermal solution activities, showing ger-manium content in lignite is generally lower; under hydrothermal solution secondary enrichment, appeared germanium enrichment inlow metamorphosed long flame coal and gas coal. On plane view, germanium enriched area showing regular distribution around the coalmetamorphic center, presumed as germanium element in strong metamorphosed coal activated by hydrothermal solution. Under the driv-ing of concentration difference, laterally transported into hydrothermal solution weakly metamorphosed but organic matter even rich yetlong flame coal and gas coal, ones again captured by organic matter, and enriched under long term hydrothermal solution activities.