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首页> 外文期刊>Geochemical Journal >Naphthalenes in Neogene sediments of the Shinjo basin, Japan
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Naphthalenes in Neogene sediments of the Shinjo basin, Japan

机译：日本新庄盆地新近系沉积物中的萘

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摘要

Naphthalene and its methyl homologs were found in Miocene to Pliocene sediments of the Shinjo basin. The total concentrations of naphthalenes ranged from 26 to 5,700 ng g(-1) from the top to the bottom sediments of an about 1,600 m thick sequence. Naphthalenes were mainly distributed in the Kusanagi Formation and their depth profile showed a characteristic feature, indicating a concentration peak at the onset of oil-generation layer. The ratio of 2 to 1-methylnaphthatene as well as the relative abundance of dimethylnaphthalene isomers, except for 1,8-isomer, showed no depth dependence. Therefore, it seems that no significant isomerizations of the naphthalene homologs had occurred during the burial diagenesis around and above the oil-generating zone in the sediments. However, as to the least stable 1,8-dimethylnaphthalene isomer, the negative logarithmic change of the relative abundance of the isomer (Alexander et al., 1984) was observed showing a trend of increasing with depth. [References: 21]
机译：在新庄盆地的中新世至上新世沉积物中发现了萘及其甲基同系物。从大约1600 m厚序列的顶部到底部沉积物，萘的总浓度为26到5,700 ng g（-1）。萘主要分布在草s组，其深度分布具有特征性特征，表明在生油层开始时存在浓度峰值。除了1，8-异构体外，2：1-甲基萘的比例以及二甲基萘异构体的相对丰度没有深度依赖性。因此，似乎在沉积物中成油区周围和上方的成岩成岩作用期间，萘同系物没有发生明显的异构化。但是，对于最不稳定的1,8-二甲基萘异构体，观察到该异构体相对丰度的负对数变化（Alexander等，1984），表现出随深度增加的趋势。 [参考：21]

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