陈义林老师在地学期刊《International Journal of Coal Geology》发表论文

发布者:指导老师(2020-09-07)

近日,我院陈义林副教授为第一作者、秦勇教授为通讯作者在国际地学期刊《International Journal of Coal Geology》上发表了题为“Differences in CH4 and C2H6 carbon isotopic compositions from open and closed pores in coal: Implications for understanding the two-stage δ13C shift during canister desorption”的学术论文。《International Journal of Coal Geology》是地球科学和能源领域国际著名期刊,在GEOSCIENCES, MULTIDISCIPLINARY类中排序第88/200),2019IF(影响因子)为5.6925年平均IF6.139,该期刊为中科院一区Top期刊。

烃类稳定碳同位素组成是研究和判识天然气来源和成因的重要手段。前人大量研究表明,煤层气瓦斯罐解吸过程中甲烷碳同位素值呈单调递增趋势。本文采集黔西织纳煤田钻孔三件新鲜煤芯,开展无烟煤瓦斯罐的精细自然解吸实验。解吸量计量的时间间隔以及气样的采集遵循先密后疏的原则,三件煤样的充分解吸时间分别为43天、61天和81天。本文首次报道了煤层气甲烷和乙烷的δ13C值在瓦斯罐解吸过程中呈现出两段式分馏模式(即碳同位素先变轻后变重),进而阐明了碳同位素两段式分馏的成因机理。

Fig. 1. Carbon isotopic changes of methane during canister desorption of three coal samples from the Daijiatian Minefield, Zhina Coalfield.

该论文的共同作者为中国科学院兰州地质所李中平研究员、曹春辉副研究员、中国矿业大学吴财芳教授、杨兆彪副教授和硕士研究生张博。

论文引用格式:

Yilin Chen, Bo Zhang, Yong Qin, Zhongping Li, Zhaobiao Yang, Caifang Wu, Chunhui Cao. Differences in CH4 and C2H6 carbon isotopic compositions from open and closed pores in coal: Implications for understanding the two-stage δ13C shift during canister desorption. International Journal of Coal Geology, 2020, 230: 1-14. https://doi.org/10.1016/j.coal.2020.103586

论文链接:

https://www.sciencedirect.com/science/article/pii/S0166516220305826