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本文研究了胶州湾滩涂养殖区沉积物中脂肪烃组成特征、特征参数及其来源解析．采集了9个站位的养殖区表层沉积物样品，经正己烷／二氯甲烷（体积比，1∶1）混合溶剂超声提取，旋转蒸发、净化浓缩后进行GC?MS检测分析．结果表明，各站位沉积物正构烷烃峰型十分相似，呈双峰态分布，显示了陆源与海源双重贡献特征．前峰型为主、陆／水生类脂物比值TAR均值为0．60、C31／C19均值为0．63，同时表明海相来源贡献大于陆相来源．奇偶优势指数OEP、Pr／Ph比值较低，均值分别为1．67、0．70，与C30βα莫烷／C30αβ藿烷、Ts／Tm、C29甾烷αββ／（αββ＋ααα）一致，表明研究区沉积物有机质成熟度较高．结合碳优势指数 CPI、短链／长链比 L／H、∑n?Alk／C16、C29甾烷20S／（20S＋20R）、C31藿烷22S／（22S＋22R）、C32藿烷22S／（22S＋22R）多个特征参数综合分析，证实了滩涂养殖区内存在石油及其衍生品的污染．较高的Ts／Tm值反映了研究区为强还原沉积环境，与Pr／Ph指示的沉积环境一致．

The composition and characteristic parameters of 9 surface sediment samples collected from Jiaozhou Bay were investigated. The samples were extracted with a mixture of 1∶1 ( V/V ) dichloromethane?haxane and analyzed by GC?MS after purification and concentration. n?Alkanes distribution patterns in all stations were characterized by double peak?cluster, which indicates dual sources from terrestrial and marine origins. The more abundant peak is the former one, while the average value of TAR and C31/C19 ratio are 0. 60, 0. 63, respectively, which show that marine contribution is higher than terrestrial source. The ratio of Pristane/Phytane ( Pr/Ph) and Odd?Even Predominance (OEP) are low and their average value are 1.67, 0.70. Combined with C30βα/C30αβ, Ts/Tm、C29αββ/(αββ+ααα) , all these indices consistently suggest that the maturity of organic matters in sediments is high. Comprehensive analysis with other characteristic parameters, such as Carbon Preference Index (CPI),L/H,∑n?Alk/C16,C29ααS/(S+R),C31αβS/(S+R),C32αβS/( S+R) indicates that beach culture area is contaminated by Petroleum or its derivatives. Higher Ts/Tm value reflects the study area is a strongly reducing sedimentary environment, which is consistent with the indicated rsults by Pr/Ph.