| 南黄海北部海底沉积物饱和烃地球化学特征及物源判识 |
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| 引用本文： | 赵青芳,何伟,董贺平,李双林.南黄海北部海底沉积物饱和烃地球化学特征及物源判识[J].海洋地质动态,2014,30(10):46-50. |
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| 作者姓名： | 赵青芳 何伟 董贺平 李双林 |
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| 作者单位： | 国土资源部海洋油气资源和环境地质重点实验室;青岛海洋地质研究所;中国石油青海油田边远油田开发公司; |
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| 基金项目： | 国家自然科学基金(41210005);中国地质调查项目(GZH200800503,GZH201200509);国土资源部重点实验室基金(MRE201215);国土资源部公益性行业科研专项(201211060) |
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| 摘 要： | 对南黄海北部48个海底表层沉积物样品进行了常规的有机地球化学分析测试,对沉积有机质中的饱和烃组分进行了色谱定量、色谱—质谱分析。测试结果显示沉积有机质受微生物的降解作用在饱和烃色谱图中出现不同程度的UCM鼓包,峰型为双峰型,奇偶碳优势明显,且长链烃奇数碳优势更加显著;石油烃参数Pr/nC17和Ph/nC18比值较高;甾、萜烷成熟度生物标志物参数均显示了有机质进入生烃的热成熟阶段。综合分析认为,南黄海北部海底沉积物受双源控制,以陆源输入为主,有机质保存条件好,成熟度较高,推测可能有外源烃的污染。
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| 关 键 词： | 南黄海北部 饱和烃 生物标志物 |
HYDROCARBON GEOCHEMICAL CHARACTERISTICS OF ORGANIC MATTERS IN SEABED SEDIMENT IN THE NORTHERN SOUTH YELLOW SEA AND IMPLICATIONS FOR SOURCES |
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| Institution: | ZHAO Qingfang,HE Wei,DONG Heping,LI Shuanglin (1 Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, MLR, Qingdao 266071,Chinas 2 Qingdao Institute of Marine Geology,Qingdao 266071,China, 3 Qinghai Oilfield Company,Dunhuang 816400, Gansu,China) |
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| Abstract: | 48surface samples from the northern part of South Yellow Sea were analyzed with traditional organic geochemical methods.Saturated hydrocarbons in the sediment organic matter were studied by GC and GC-MS.Results show that the organic matter had been degraded by the microbe,and the chromatogram of the saturated hydrocarbon shows certain amount of UCM,in a pattern of bimodal distribution,with predominate odd carbon number.The values of Pr/nC17 and Ph/nC18 are high.The biomarkers of terpane and sterane show that the organic matters are matured and began to generate hydrocarbon.Multidisciplinary study reveals that the organic matters in the seabed surface sediments of the northern South Yellow Sea are mainly coming from terrestrial high-rank plants and are well preserved,and the maturity of organic matter is rather high.All of these suggest a kind of exogenous hydrocarbon contamination. |
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| Keywords: | the Northern South Yellow Sea saturated hydrocarbon biomarkers |
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