title: PAHs distribution in sediments associated with gas hydrate and oil seepage from the Gulf of Mexico.
abstract: Six sediment samples collected from the Gulf of Mexico were analyzed. Total concentrations of the PAHs ranged from 52 to 403 ng g(-1) dry weight. The lowest PAH concentration without 5-6 rings PAHs appeared in S-1 sample associated with gas hydrate or gas venting. Moreover, S-1 sample had the lowest organic carbon content with 0.85% and highest reduced sulfur level with 1.21% relative to other samples. And, analysis of the sources of PAHs in S-1 sample indicated that both pyrogenic and petrogenic sources, converserly, while S-8, S-10 and S-11 sample suggested petrogenic origin. The distribution of dibenzothiophene, fluorine and dibenzofuran and the maturity parameters of triaromatic steranes suggested that organic matters in S-1 sample were different from that in S-8, S-10 and S-11 sample. This study suggested that organic geochemical data could help in distinguish the characteristic of sediment associated with gas hydrate or with oil seepage.
authors: MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China. wangcp@nankai.edu.cn
authors: Cuiping
authors: C
authors: Wang
authors: Hongwen
authors: H
authors: Sun
authors: Ying
authors: Y
authors: Chang
authors: Zhiguang
authors: Z
authors: Song
authors: Xuebo
authors: X
authors: Qin
mesh_terms: D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D060851:Gulf of America; D059206:Natural Gas / Q000032:analysis; D010578:Petroleum / Q000032:analysis; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D059206:Natural Gas; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical