Geochemistry of Rare － Earth Elements of Coal in Huainan Mining Area
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摘要: 采用INAA测试了淮南矿区 13个煤层煤样的稀土元素含量,研究了稀土元素地球化学特征,得出以下认识 :各煤层样品的稀土元素含量、分布模式变化都很大。煤中稀土元素主要来源于陆源碎屑,来源于海水和植物的不多;稀土元素在粘土矿物中含量高,主要以高岭石的形式赋存。稀土元素具有指相意义,随着成煤沼泽中海水影响的减弱,陆源影响的增强,煤中稀土元素的含量增加;煤的稀土元素分布模式也作有规律的变化,从类似于海相生物的分布模式到类似于陆源碎屑岩的分布模式。Eu异常是由源岩继承下来的,Eu负异常的减弱,估计是由于陆源控制减弱、海水影响增强引起的。在成煤沼泽环境中,海水的影响并未造成Ce严重亏损。Abstract: An INAA (Instrumental Neutron Activation Analysis)method is used to determine the contents of rare-earth elements of 13 coal samples in Huainan Mining Area, and the geochemistry of REE is discussed.Some conclusions are drawn as follows:The REE contents and REE distribution patterns vary significantly among different coal samples.The REE in coals is mainly continental origin,while seawater origin and plant origin are few.The REE in coals is concentrated in clay minerals,and the main occurrence is in kaolinite.The characteristics of REE have significance to indicate sedimentary environments.With the decreasing influence of seawater and the enhanced influenc of continental origin to swamps,the contents of REE in coal increase,and the REE distribution patterns change regularly.Eu anomaly is inherited by the source rock.The decrease of negative Eu anomaly is probably caused by the weakenss of continental origin and the enhancement of seawater's influence.In peat swamp environment,no effective influence is found to lose Ce by the invasion of seawater.
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Key words:
- Rare-Earth Elements(REE) /
- geochemistry /
- coal /
- Huainan Mining Area
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[1] Henderson P. Rare earth element gcochemistry[M] . Amsterdam: Elsevi-er Science Publishers B. V. 1984.343～374 [2] Seredin V V. Rare earth element - bearing coals from the Russian FarEast deposits[J] . Int. J. Coal Geology. 1996,30:101～129 [3] 陈冰如,钱琴芳,杨亦男等.我国107个煤矿样中微量元素的浓度分布[J] .科学通报,1985,30(1)：27～29 [4] 王中刚,于学元,赵振华.稀土元素地球化学[M] .北京：科学出版社,1989.310～313 [5] 王运泉,任德贻,雷加锦等.煤中微量元素分布特征初步研究[J] .地质科学,1997,32(1)：65～73 [6] 邵靖邦,曾凡桂,王宇林等.平庄煤田煤中稀土元素地球化学特征[J] .煤田地质与勘探,1997,25(4)：13～15 [7] 韩树芬.两淮地区成煤地质条件及成煤预测[M] .北京：地质出版社,1990.1～30 [8] 陈德潜,陈刚.实用稀土元素地球化学[M] .北京：冶金工业出版社,1990.144～151 [9] Birk D,White J C. Rare carth elements in bituminous coals and under-clays of the Sydney Basin, Nova Scotia:Element sites, distribution, min-eralogy[J] . Int J. Coal Geology. 1991,19:219～251 [10] Herrmann,A G. Yttriun and Lanthanides[A] . In:Wedepohl K. H,ed.Handbook of Geochemistry(Vol. 11/2,39:57～71 - C [C] . Berlin -Heidelberg:Spring- Verlag. 1970.1～10 [11] 赵一阳,王金土,秦朝阳等.中国大陆架海底沉积物中的稀土元素[J] .沉积学报,1990,8(1)：37～43 [12] Ure A M, Bacon J R. Scandium, yttrium and the rare earth contents ofwaterlily(Nuphar lutea )[J] . Geochimca et Cosmochimca Acta. 1978,42:651～652 [13] Bouska V. Geochemistry of coal[M] . Amsterdam: Elsevier. 1981. 284～294 [14] Eskenazy G M. Rare earth elements in a sampled coal from the Pirindeposit, Bulgaria[J] . Int. J. Coal Geology. 1987,7: 301～314 [15] 李平华,赵师庆.两淮煤田石炭－二叠纪煤系气源岩的有机岩石学特征[J] .淮南矿业学院学报,1989,(3)：23～35 [16] 江汉铨,傅金志.皖北二叠纪煤的煤岩组分[J] .中国煤田地质,1992,4(1)：31～35 [17] 陈佩元,孙达山,丁丕训等.中国煤岩图鉴[M] .北京：煤炭工业出版社,1996.35～48 -
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