Geochemical Characteristics of Hydrocarbons in the Core Sediments from Bohai Bay

【目的】揭示人类活动对渤海生态环境的影响,为人类活动对近海生态环境的影响评价和决策管理提供科学依据。【方法】用色谱-质谱联用仪(GC-MS)分析位于渤海埕岛油田石油钻井平台附近的沉积物柱样,研究柱样沉积物中烃类化合物的地球化学特征,并探讨其沉积环境的指示意义。【结果】黄河的陆源物质输运是渤海沉积物中有机质的重要来源。此外,表层沉积环境以氧化为主,15cm深度后的沉积环境由相对偏氧化向偏还原过渡。【结论】对比于渤海烃类化合物的沉积记录发现,渤海柱样沉积物分子组成特征变化趋势与渤海石油开发勘探的历程基本相似。【Objective】Inordertorevealtheinfluenceofhumanactiononthegeographicaleco- environmentofBohaiBay.【Methods】Theverticalvariationandcompositionofaliphatichy- drocarbonsandbiomarkerofthecoresedimentsnearoffshoreoildrillingplatformfromthe BohaiBaywereexactlyevaluatedandcharacterizedintermsofthemolecularcompositionof thehydrocarboncompoundsandtheirimplicationforthesedimentaryenvironment.【Results】 ItcanbeshownthatthemostimportantorganicsourceincoresedimentsfromBohaiBayis theterrestrialmattertransportedbytheYellow River.Thesedimentarysettingexchanged fromtheoxidativeconditiontotheanoxicones withtheincreasingdepthatthe15cm.【Conclu- sion】Thedistributionofpetroleum hydrocarbon instudiedareaareconsistentwiththedevelop- mentperiodsofoil-gasexplorationintheBohai Bay