Characteristics and indicative significance of hydrocarbon composition in shallow soil of polar permafrost region
YANG Zhi-Bin1, 2, 3, ZHANG Fu-Gui1, 2, 3, WANG Hui-Yan1, 2, 3
1.The National Center for Geological Exploration Technology,Langfang 065000,China; 2.Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China; 3.Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone,CAGS,Langfang 065000,China;
Abstract：Mohe basin is the main permafrost distribution area in China. The performance of experimental geochemical prospecting methods in the northwestern permafrost area of Mohe basin detected acidolysis hydrocarbon and adsorbed hydrocarbon in shallow soil, and the adsorbed hydrocarbon has relatively high value, with the average methane value being 12.48μL/L and the maximum value being 49.93μL/L,whereas acidolysis hydrocarbon has relatively low content. The results of three-dimensional fluorescence spectra show that hydrocarbon gas exhibits characteristics of condensate oil, which is pyrolysis gas, indicating that the deep source gas migrates to the surface and manifests microscopic geochemical information. Combined with the permafrost, temperature and pressure conditions, it is shown that the deep permafrost area probably has oil gas and natural gas hydrate.
杨志斌, 张富贵, 王慧艳. 极地冻土区浅表土壤烃类组成特征及指示意义[J]. 物探与化探, 2017, 41(6): 1190-1194.
YANG Zhi-Bin, ZHANG Fu-Gui, WANG Hui-Yan. Characteristics and indicative significance of hydrocarbon composition in shallow soil of polar permafrost region. Geophysical and Geochemical Exploration, 2017, 41(6): 1190-1194.
