三种不同类型盆地煤中微量元素对比研究

Comparative Studies of Trace Elements in Coals from Three Different types of Basins

本文选择阜新盆地海洲露天矿、山西大同煤田煤峪口矿和朔县平朔煤田安太堡露天矿三种不同类型盆地的矿区进行煤中微量元素的对比研究。初步阐述了断陷盆地、陆表海盆地和大型内陆拗陷盆地煤中的微量元素特征，对比了这三种不同类型盆地煤中微量元素的差异，并提出产生这些差异的主要因素是泥炭沼泽形成时的沉积环境背景、泥炭沼泽相及盆地的物源区。

Comparative studies of trace elements in coals were carried out for three mining areas in three different types of basins, i.e., the Haizhou openpit mine in Fuxin basin, the Meiyukou mine in Datong coalfield and the Antaibao openpit mine in Pingshuo coalfield, Shuoxian County. This paper summarizes characteristics and differences of trace elements in coals of the three different types of basins (faulted basin, epicontinental sea basin and large_size intracontinental down_warped basin), and points out that the main factors responsible for these differences are sedimantary environment for the formation of the peat bog, peat bog facies and source areas of the basins. The seawater_influenced Pingshuo coals have relatively high content of Li, Ti, Cu, Ga, Zr, Sn, Hf, Ta, W, Pb, Th, U and REE, the continental Datong coals are characterized by comparatively high Ni and Ba, and Fuxin coals are noted for evidently high Cr, Co, Rb, Mo, Cs and B. The depletion of Eu in coals are mainly related to the oxidation_reduction of the peat bog: the higher the oxidation of the peat bog, the more obvious the Eu depletion.