Key Laboratory of Resource Exploration Research of Hebei Province,Hebei University of Engineering,Handan　 056038,China

以重庆中梁山K1a煤层为研究对象,通过煤样显微组分煤相参数计算表明,K1a煤的成煤环境为潮湿的森林沼泽还原环境,成煤植物以木本植物为主。通过索式抽提和族组分分离实验,利用气相色谱(GC)和色谱-质谱联用(GC-MS),对煤中有机质的组成特征及分子地球化学参数进行分析。结果表明,中梁山K1a煤层煤样成煤植物以陆相高等植物为主,但不排除海相低等生物的输入;煤层具有偏还原的成煤环境,热演化程度较高;芳烃化合物以萘系、菲系和联苯系为主,热力学稳定性较强的同分异构体占有优势地位,芳烃中硫芴含量高于氧芴,亦表明偏还原的成煤环境。煤样显微组分分析的结果与煤中有机质分析结果相互印证。

Samples from K1a coal seam in the Zhongliangshan mine were investigated by microscopy and organic geo- chemistry. The coal facies parameters show that the Zhongliangshan coal formed in wet forest swamp under reductive environment,and the coal-forming plants were mainly woody plants. After Soxhlet extraction and group components separation,the composition and molecular geochemical features of organic matter were analyzed by gas chromatograph (GC) and gas chromatograph-mass spectrometry ( GC-MS). The results indicate that the coal-forming plants were mainly terrestrial higher plants. However,the input of marine phytoplankton cannot be excluded. The coal-forming en- vironment was reductive,and the coal seam underwent relatively higher thermal evolution. Aromatic hydrocarbons were dominated by naphthalenes,phenanthrenes and biphenyls. The isomers of aromatic hydrocarbons with higher thermody- namic stability had an advantage position,and the contents of dibenzothiophenes were higher than dibenzofurans,which also implies the reductive coal-forming environment. The results from microscopic and the organic geochemical analy- ses verify mutually.

国家自然科学基金资助项目(41472133)；河北省自然科学基金资助项目(D2018402093)；河北省高校百名优秀创新人才支持计划资助项目(BR2-204)；

QIN Shenjun,LU Qingfeng,WU Shihao,et al. Organic geochemistry of the Late Permian Coal from the Zhongliangshan mine,Chongqing [J]. Journal of China Coal Society,2018,43(7):1973-1982.