徐州大屯腐泥煤的煤岩煤质和微量元素特征  

Sapropelic Coal Petrologic,Quality and Trace Element Characteristics in Datun Mining Area,Xuzhou

作　　者：周国庆 姜尧发 刘梦溪 

机构地区：[1]徐州建筑学院地质研究所,江苏徐州221116

出　　处：《中国煤炭地质》2011年第7期7-9,共3页Coal Geology of China

摘　　要：运用电感耦合等离子质谱(ICP-MS)、冷蒸汽原子吸收光谱(CV-AAS)、显微镜光度计和煤化学等方法,对江苏徐州大屯矿区张双楼12-1号钻孔腐泥煤(太原组17号煤层)和龙固煤矿腐植煤(太原组21号煤层)的煤岩煤质和微量元素特征进行研究。结果显示,徐州大屯矿区腐泥煤中藻类体含量很高,是典型的藻煤,其挥发份产率和氢含量是腐植煤的1.5倍;腐泥煤的Sr/Ba为1.43,腐植煤为0.48,揭示该腐泥煤是在比较开阔的海水中形成的;腐泥煤和腐植煤中的不相容元素在原始地幔标准化曲线上具有一致的Pb显著富集、Ti显著亏损的分布特征,其稀土元素丰度球粒陨石标准化曲线形态相似,均显示轻稀土富集、重稀土相对亏损的特征;腐泥煤中Ce和Eu元素未发生价态变化,腐植煤中Eu显示负异常。Using inductively coupled plasma mass spectrometry（ICP-MS）,cold vapor atomic absorption spectrometry（CV-AAS）,microscopic photometry and coal chemistry methods carried out coal petrologic,quality and trace element characteristic study on Zhangshuanglou No.12-1 borehole sapropelic coal（Taiyuan Formation No.17 coal seam） and Longgu coalmine humic coal（Taiyuan Formation No.21 coal seam） in Datun mining area,Xuzhou,Jiangsu.The result demonstrated that the alginate content in sapropelic coal in Datun mining area is quite high,thus typical boghead coal,its volatile matter yield and hydrogen content are 1.5 times of humic coal.Sr/Ba ratio in sapropelic coal is 1.43,while in humic coal 0.48,that revealed the sapropelic coal was formed in rather open sea water.Incompatible elements both in sapropelic and humic coals have distribution features of coincident notable Pb enrichment and Ti short on primitive mantle normalized patterns,it is similar to REE abundance chondrite normalized patterns,and showing characteristics of LREE enrichment and HREE relative short.Ce and Eu elements valence state variations have not been happed in sapropelic coal,while in humic coal the Eu presents negative anomaly.

关 键 词：腐泥煤 腐植煤 微量元素 徐州大屯矿区 

分 类 号：P618.7[天文地球—矿床学] P595[天文地球—地质学]