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标题：HIDROCARBUROS EN SEDIMENTOS SUPERFICIALES DE LA PLATAFORMA CONTINENTAL DEL PACÍFICO TROPICAL MEXICANO
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作者：Diego LOPEZ-VENERONI ; Guadalupe DE LA LANZA-ESPINO ; Alfonso V BOTELLO 等
期刊名称：Revista Internacional de Contaminación Ambiental
印刷版ISSN：0188-4999
出版年度：1999
卷号：15
期号：2
页码：85-93
语种：Spanish
出版社：Centro de Ciencias de la Atmósfera
摘要：Hydrocarbons from Mexican eastern tropical Pacific surface shelf sediments were measured in 37 stations to establish baseline concentrations and possible origins and transformations in the region. Aliphatic hydrocarbon concentrations ranged from 1.3 to 61.3 ppm and aromatic hydrocarbons varied from 1.3 to 272.5 ppm. The modal values for both fractions were within the concentration range of pristine environments. The n-alkane chains nC 31 , nC 29 , nC 27 , nC 18 and nC 19 , predominated among the aliphatic fraction. A few polycyclic aromatic hydrocarbons (PAH) of possible terrestrial origin were present. The relatively high nC 18 and phytane concentrations, low pristane:phytane ratios, and the presence of PAHs, reflect the anoxic environment of deposition. Accumulation and preservation of organic matter over the shelf is feasible considering the environmental characteristics of the region.
其他摘要：Hydrocarbons from Mexican eastern tropical Pacific surface shelf sediments were measured in 37 stations to establish baseline concentrations and possible origins and transformations in the region. Aliphatic hydrocarbon concentrations ranged from 1.3 to 61.3 ppm and aromatic hydrocarbons varied from 1.3 to 272.5 ppm. The modal values for both fractions were within the concentration range of pristine environments. The n-alkane chains nC31, nC29, nC27, nC18 and nC19, predominated among the aliphatic fraction. A few polycyclic aromatic hydrocarbons (PAH) of possible terrestrial origin were present. The relatively high nC18 and phytane concentrations, low pristane:phytane ratios, and the presence of PAHs, reflect the anoxic environment of deposition. Accumulation and preservation of organic matter over the shelf is feasible considering the environmental characteristics of the region.
关键词：Mexican Tropical Pacific Ocean; hydrocarbons; sediments