云南临沧地区煤中微量元素地球化学研究
发布时间：2018-11-16 09:50
【摘要】：为探明云南临沧帮买盆地及其周边煤中微量元素的含量水平及环境效应,共采集了 23个样品,其中包括勐托8个煤样、3个煤夹矸样,大寨6个煤样、6个煤渣样,分别对大寨和勐托煤中微量元素含量水平及富集情况进行讨论,并探讨了勐托煤与煤夹矸中和大寨煤与煤渣中的微量元素差异对比。将勐托区、大寨区煤样中微量元素含量与中国煤、世界煤中相应元素含量进行对比,勐托与大寨煤中微量元素有着不同程度的富集,并且富集元素种类略有不同。勐托和大寨煤样中包括稀土元素在内的元素含量及部分元素相关性参数说明了物源环境与热液活动分别对煤中微量元素产生了影响,热液活动造成勐托与大寨煤中稀土元素分布模式显著差异,Ge、Be、As、W在大寨煤中的富集是由热液携带基底二云母花岗岩微量元素影响所致;U、Pb、Bi、Th在帮买盆地的富集与热液无关,可能与酸性花岗岩的物源供给有关。通过探讨煤中微量元素在大寨煤与煤渣的含量差异,得出结论:煤中稀土元素经燃烧并不改变分布模式,只是含量上略有差距;大寨煤渣各个样品微量元素的总含量上差别大,但比大寨煤中微量元素的波动范围稍小;除Ge、T1外,其余微量元素在煤渣中均有不同程度的富集。对照勐托地区煤与煤夹矸中微量元素,我们应该着重注意夹矸中含量较高的有害元素,以防污染的扩散。
[Abstract]:In order to find out the content level and environmental effect of trace elements in coal in and around Lincang Basin, Yunnan Province, 23 samples were collected, including 8 samples from Mengto, 3 samples from gangue, 6 samples from Dazhai and 6 samples from cinder. The content and enrichment of trace elements in Dazhai and Mengto coals were discussed, and the differences of trace elements between Mengto coal and coal gangue and in Dazhai coal and cinder were discussed. Comparing the trace element content in the coal samples of Mengto and Dazhai with that of the Chinese coal and the coal of the world, the trace elements in Mengto and Dazhai coals are enriched to different degrees, and the types of the enriched elements are slightly different. The contents of elements including rare earth elements in the samples of Mengto and Dazhai coal and the correlation parameters of some elements indicated that the source environment and hydrothermal activity had different effects on trace elements in coal. The distribution pattern of rare earth elements in Mengto coal and Dazhai coal is significantly different due to hydrothermal activity, and the enrichment of Ge,Be,As,W in Dazhai coal is caused by the influence of microelements in the basement dimica granite carried by hydrothermal solution. The enrichment of PbPbTh in the Bangmai basin is not related to hydrothermal solution, but may be related to the provenance of acid granite. By discussing the difference of trace elements in Dazhai coal and cinder, it is concluded that the distribution pattern of rare earth elements in coal is not changed by combustion, but there is a slight difference in the content of rare earth elements in coal. The total content of trace elements in Dazhai coal slag varies greatly, but the fluctuation range of trace elements in Dazhai coal is smaller than that in Dazhai coal. Except for Ge,T1, the other trace elements are enriched in different degrees in the cinder. Compared with trace elements in coal and gangue in Mengto area, we should pay more attention to harmful elements in gangue in order to prevent the spread of pollution.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.11
[Abstract]:In order to find out the content level and environmental effect of trace elements in coal in and around Lincang Basin, Yunnan Province, 23 samples were collected, including 8 samples from Mengto, 3 samples from gangue, 6 samples from Dazhai and 6 samples from cinder. The content and enrichment of trace elements in Dazhai and Mengto coals were discussed, and the differences of trace elements between Mengto coal and coal gangue and in Dazhai coal and cinder were discussed. Comparing the trace element content in the coal samples of Mengto and Dazhai with that of the Chinese coal and the coal of the world, the trace elements in Mengto and Dazhai coals are enriched to different degrees, and the types of the enriched elements are slightly different. The contents of elements including rare earth elements in the samples of Mengto and Dazhai coal and the correlation parameters of some elements indicated that the source environment and hydrothermal activity had different effects on trace elements in coal. The distribution pattern of rare earth elements in Mengto coal and Dazhai coal is significantly different due to hydrothermal activity, and the enrichment of Ge,Be,As,W in Dazhai coal is caused by the influence of microelements in the basement dimica granite carried by hydrothermal solution. The enrichment of PbPbTh in the Bangmai basin is not related to hydrothermal solution, but may be related to the provenance of acid granite. By discussing the difference of trace elements in Dazhai coal and cinder, it is concluded that the distribution pattern of rare earth elements in coal is not changed by combustion, but there is a slight difference in the content of rare earth elements in coal. The total content of trace elements in Dazhai coal slag varies greatly, but the fluctuation range of trace elements in Dazhai coal is smaller than that in Dazhai coal. Except for Ge,T1, the other trace elements are enriched in different degrees in the cinder. Compared with trace elements in coal and gangue in Mengto area, we should pay more attention to harmful elements in gangue in order to prevent the spread of pollution.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.11
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