LI Yuejiao
1 School of Ocean Sciences, China University of Geosciences, Beijing 100083, China 2 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaSU Xin
1 School of Ocean Sciences, China University of Geosciences, Beijing 100083, China 2 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, ChinaJIAO Lu
3 Guizhou University of Finance and Economics, Guiyang 550025, ChinaCHEN Fang
4 Guangzhou Marine Geological Survey, Guangzhou, 510075, ChinaCHENG Sihai
4 Guangzhou Marine Geological Survey, Guangzhou, 510075, ChinaThis work is supported by the Natural Science Foundation of China (Grant Nos. 40672005 and 41776066). We thank the crew and scientists of the Guangzhou Marine Geological Survey for their support in sediment samples and analysis. Dr. Susan Turner (Brisbane) assisted with English language.
A number of cold seeps have been discovered in the northern South China Sea (SCS) including the Haiyang 4 cold-seep area where Core 973-5 was collected. Intact polar lipids (IPLs) and core lipids (CLs) were analyzed separately in sediments from Core 973-5. The most abundant lipid biomarkers were isoprenoidal GDGTs (isoGDGTs), with Crenarchaeol and GDGT-0 predominating. IPL-isoGDGTs and CL-isoGDGTs were mainly derived from Thaumarchaeota. IPL-isoGDGTs were mainly produced and retained in situ thus containing most of the in situ microbiological information. Branched GDGTs were predominantly derived from generated in marine production, and mixed with some terrestrial inputs. All IPLs groups presented a high value in the sulfate-methane transition zone (SMTZ). Furthermore, IPL and CL-MI, IPL-R0/4 showed the highest values within the SMTZ, while IPL and CL-R4/i had the lowest values at the SMTZ, suggesting that the contribution of Methanophila and methanogenic to GDGTs increased, while the contribution of ammonia-oxidizing Archaea to GDGTs decreased at the SMTZ.
LI Yuejiao, SU Xin, JIAO Lu, CHEN Fang, CHENG Sihai.2022. Intact Polar and Core Tetraether Lipids in Sediments from the Haiyang 4 Cold-seep of the Northern South China Sea and their Implications[J]. Acta Geologica Sinica(),96(2):691-700
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