以桑树坪矿11号煤8个样品为研究对象进行有机地球化学研究，利用气相色谱-质谱联用仪（GC-MS）、X射线荧光光谱分析（XRF）测试方法，结合工业分析、形态硫、随机镜质组反射率的测试结果，综合分析陕西韩城矿区桑树坪矿11号煤有机质的母质来源及成煤环境。结果表明，煤样全硫含量均值3.29%，油浸随机镜质组反射率均值为2.01%，为高硫贫煤。常量元素指相参数表明，煤样主要形成于还原沉积环境。饱和烃中的正构烷烃碳数分布存在前峰型及后峰型2种类型，前峰型主碳峰为C₁₆，后峰型主碳峰为C₂₆；结合∑C₂₂⁻/∑C₂₃⁺、(C₂₁+C₂₂)/(C₂₈+C₂₉)、Pr/nC₁₇、Ph/nC₁₈等分布特征指示煤样有机质母质来源于水生生物和高等植物的双重贡献。OEP值处于0.49～1.05之间，均值为0.84，指示桑树坪11号煤经历了不同程度的生物降解。饱和烃甾萜烷化合物分析中，w(T_s)/w(T_m)(T_s为18α(H)-22、29、30三降霍烷，T_m为17α(H)-27、29、30三降霍烷)处于0.83～1.21，w(T_s)/[w(T_s)+w(T_m)]在0.45～0.55，说明煤样热演化程度较高；芳烃化合物分析中，三甲基萘的甲基重排作用及甲基菲指数的分布特征均表示与煤样较高的热演化程度相关。芳烃化合物以萘系列、菲系列和联苯系列为主，且三芴系列(氧芴OF、硫芴SF、芴F)中含硫系列化合物明显高于含氧系列，同样指示了盐度较高偏还原条件的成煤环境。

Eight samples of No.11 coal in Sangshuping Mine were used for organic geochemical study, Gas chromatography-mass spectrometry (GC-MS) and X-ray fluorescence spectrometry (XRF) were combined with the test results of proximate analysis, sulfur forms and random vitrinite reflectance, the organic matter sources and coal-forming environment of No.11 coal from the Sangshuping mine, Shaanxi Province were comprehensively analyzed. The results indicate that the total sulfur content of the coal sample is 3.29%, and the mean vitrinite oil-leaching reflectance is 2.01%, which is high-sulfur lean coal. The phase parameters of major elements indicate that the coal samples are mainly formed in reductive sedimentary environment. There are two types of carbon number distribution of n-alkanes in saturated hydrocarbon: the front peak type main carbon peak is C₁₆, and the back peak type is main carbon C₂₆; Combined with the distribution characteristics of ∑C₂₂⁻/∑C₂₃⁺、(C₂₁+C₂₂)/(C₂₈+C₂₉)、Pr/nC₁₇、Ph/nC₁₈ indicated that the parent material of organic matter come from aquatic organisms and higher plants. The OEP value was between 0.49 to 1.05,with an average value of 0.84, indicating that No.11 coal of Sangshuping has undergone different degrees of biodegradation. In the analysis of saturated hydrocarbon steroidal terpanes, the ratio of T_s/T_m and T_s/(T_s+T_m) is between 0.83-1.21 and 0.45-0.55, indicating that the thermal evolution degree of coal sample is high. In the analysis of aromatic compounds, the methyl rearrangement of trimethylnaphthalene and the distribution characteristics of methyl phenanthrene index are correlated with the high thermal evolution degree of coal samples. The aromatic hydrocarbons were dominated by naphthalene, phenanthrene and biphenyl series, and the sulfur-containing compounds in the trifluorene series (oxygen-fluorene, sulfur-fluorene, fluorene) are obviously higher than the oxygen-containing compounds, which also indicates the coal-forming environment under higher salinity partial reduction conditions.