内蒙古胜利煤田共生锗矿与成煤沼泽微环境的成因关系  

Genetic relationship of Ge-coal deposit in Shengli coalfield and micro-environment of coal-forming swamp

作　　者：杜刚[1,2] 夏斌[1] 秦胜利 汤达祯[3] 黄文辉[3] 万欢[3] 

机构地区：[1]中国科学院边缘海地质重点实验室,广东广州510640 [2]内蒙古煤田地质局,内蒙古自治区呼和浩特010051 [3]中国地质大学(北京)能源学院,北京100083

出　　处：《煤炭学报》2008年第4期405-409,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划资助项目(2006CB202202);国家自然科学基金资助项目(40572090,40772095)

摘　　要：测试的200个煤样采自沿煤层走向和垂直方向的29个钻孔,研究发现,锗的含量沿煤层的走向和垂直方向的分布并不均一,高锗品位可能出现在煤层的顶部、中部和底部,最高的锗含量大多出现在煤层中部.这个结论有别于前人的研究结论:一般认为最高的锗含量只出现在煤层的顶部或底部.根据锗含量与煤相的关系:锗含量和腐植质含量(V)、V?I,V?w(F+SF)、凝胶指数(GI)等显示正相关关系和惰质组含量(I)、惰质体含量(IR)、转化指数(TI)呈负相关;而锗含量和成煤植物组织保存指数(TPI)的关系不明确.由此表明,煤中锗的聚集与成煤沼泽微环境有成因上的联系,有利于锗聚集的环境是弱水动力、低水位、高还原性的停滞沼泽环境.Germanium contents of 200 coal samples coming from 29 boreholes along trends and uprightness of the coal seams were studied. The result is that Ge distributes inhomogeneously, high contents of Ge may appear on the top, middle and bottom of coal seams and the maximum mostly in the middle part, which is different from the previous research conclusions that the maximum content is only on the top or bottom of the coal seams. According to the relation between Ge content and coal facies, Ge content has direct correlation with huminite content（V） , ratio V/I, V/w（ F ＋ SF） and gelification index（ GI ）, and negative correlation with inertinite content（ I）, inertinite ratio（ IR ）, transformation index （TI）. However, the relationship with tissue preservation index （ TPI ） is still unclear. In conclusion, the accumulation of Ge in coal has the genetic relationship with the micro-environment of coal-forming swamp and the favorable Ge accumulation condition is weak water dynamics, low water level and high reductive stagnant swamp.

关 键 词：内蒙古 胜利煤田 锗 褐煤 煤相 

分 类 号：P618.75[天文地球—矿床学]