Even-carbon predominance of Monomethyl branched alkanes in Humic coal from Junggar Basin, NW China

  • Qingsong Cheng
  • Min ZhangEmail author
  • Guanghui Huang
Original Article


A series of Monomethyl branched alkanes compounds were detected between nC14–nC36, in immature and low maturity Jurassic humic coal, Junggar basin. 2-methyl alkanes and 3-methyl alkanes accounted for the vast majority of the compounds. It is worth noting that the 2-methyl alkanes in the humic coal samples show an obvious distribution of even carbon predominances rarely reported in the literature. The results show that with the increase of Pr/Ph (pristane/phytane), the even carbon dominance of 2-methyl alkanes is more obvious, while the odd carbon number distribution of 3-methyl alkanes is weakened. As Pr/Ph increases in the humic coal, the relative content of the hopanes increased, while the relative content of 2-methyl alkanes and 3-methyl alkanes increases first and then decreases.


Junggar basin Humic coal Even carbon predominance 2-methyl alkanes 3-methyl alkanes 



This research was financially supported by the National Natural Science Foundation of China (No. 41772124) and National Science and Technology Major Project (No. 2016ZX05007001-002).


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Copyright information

© Science Press and Institute of Geochemistry, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Resources and EnvironmentYangtze UniversityWuhanChina
  2. 2.Key Laboratory of Exploration Technology for Oil & Gas Research (Yangtze University)Ministry of EducationWuhanChina

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