为了研究桂北中奥陶统升坪组黑色页岩的形成机理、形成区的古环境和古气候、构造背景和物源等，在广西壮族自治区桂林市全州县文桥镇栗水村溪水源剖面升坪组采集16件黑色页岩以及黑色硅质页岩样品，并对其进行元素地球化学测试和分析。结果表明：溪水源剖面升坪组黑色页岩中主量元素SiO₂的含量最高（62.37% ~ 91.65%，平均值为78.04%），其次为Al₂O₃（2.88% ~ 16.92%，平均值为9.15%），研究区微量元素与北美页岩（NASC）的含量相比所有元素均表现为亏损。样品（La/Yb） _N值为7.185 ~ 15.858，平均值为10.678，轻稀土元素（LREE）／重稀土元素（HREE）为8.165 ~ 15.440，平均值为11.029。表明轻重稀土分异现象较明显，LREE相对HREE富集；δEu值表现负异常（0.589 ~ 0.950，平均值为0.758）；δCe值表现正异常（1.165 ~1.412，平均值为1.259）。地球化学特征显示：溪水源剖面升坪组黑色页岩源区构造背景为被动大陆边缘，源岩类型为沉积岩；源区遭受了中等偏强程度的化学风化，受化学风化作用影响较大，以温湿气候为主；沉积环境以缺氧的还原环境为主。

In order to study the formation mechanism, paleoenvironment, paleoclimate, tectonic background, and source of black shale in the Shengping Formation of the Middle Ordovician in northern Guangxi, sixteen samples of black shale and black siliceous shale were collected from the Shengping Formation at Xishuiyuan section in Quanzhou County, Guilin City, Guangxi Zhuang Autonomous Region, and element geochemistry testing and analysis were conducted on them. The results show that the content of the main element SiO₂ in the black shale of the Shengping Formation at Xishuiyuan section is the highest (62.37% ~ 91.65%, average 78.04%), followed by Al₂O₃(2.88% ~16.92%, average 9.15%). Compared with the North American shale (NASC), the content of trace elements in the study area shows a loss for all elements. The value of the sample (La/Yb)_N is 7.185 ~ 15.858, with an average of 10.678. The light rare earth elements (LREE)/heavy rare earth elements (HREE) values are 8.165 ~ 15.440, with an average of 11.029. It indicates that the differentiation phenomenon of light and heavy rare earth elements is more obvious, and LREE are relatively enriched compared to HREE. The δEu value exhibits negative anomalies (0.589 ~ 0.950, with an average value of 0.758); The δCe value exhibits positive anomalies (1.165 ~ 1.412, with an average of 1.259). The geochemical characteristics show that the structural background of the black shale source area in the Shengping Formation of the Xishuiyuan profile is passive continental margin, and the source rock type is sedimentary rock. The source area has undergone moderate to strong chemical weathering, which is greatly affected by chemical weathering, with a predominantly warm and humid climate. The sedimentary environment is mainly a deoxidizing environment with oxygen deficiency.