ORGANIC GEOCHEMISTRY OF VITRINITE IN ISOALTERED COAL-Chromatographic Features of Bitumen A, its Family Componente and Alcanes
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摘要: 作者对华北东南部的苏北和鲁南等煤田的12个矿区的山西组（P11 ）和太原组（C3）主要可采煤层的全层样品的镜质组富集物,进行了有机地球化学某些参数的分析和研究.研究结果表明,这些有机地球化学参数均受镜质组煤阶和类型的控制,并随煤阶的增高而呈一定规律性的变化.相同煤阶下,受海侵影响的太原组煤镜质组,其沥青A、总烃、饱和烃含量较高和较高的C21-/C21+值、C21+C22/C28+C29值、Pr/Pn值以及较低的主峰碳数等特征,均与海相的低等生源物质输入泥炭地有关.Abstract: Vitrinites in the samples representing the whole layer of the main mining coal beds were taken from Shanxi Group (P11) and Taiyuan Group of 12 mining areas in Northern Jiangsu and Southern Anhui coal fields in the Southeast of Northern China.The authors made analysis and study on certain parameters of organic geochemistry.The results show that these organic geochemical parameters are all controlled by coal grades and type of vitri-nite,which changes regularly as coal grades improved.For the same coal grade,the vitrinite of Taiyuan coal effectted by transgression is high in the contents of bitumen A,total hydrocarbons,saturated hydrocarons,C12-/C21+ C21+C22/C28+C29,and Pr/Ph ratios;and low in carbon number of main peak of n-alkanes,etc.,all of which are related to the input of marine primary organisms in to the peat bog.
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