塔里木盆地海相原油汞同位素组成特征
Characteristics of mercury isotopic composition of marine crude oil in Tarim Basin
查看参考文献58篇
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文摘
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原油中普遍赋存汞,汞可能为油气成因与来源提供信息。研究了塔里木盆地海相原油中汞含量及汞同位素组成特征,揭示了原油与藻类等低等生物中汞同位素组成特征的相关性。塔里木盆地海相原油中汞含量变化范围为0.71~23.70 μg/kg,均值为(4.00±5.53)μg/kg(n=28,1SD,即1倍标准偏差)。原油中汞同位素非质量分馏(Δ~(199)Hg)大多为正值,分布范围为-0.07‰~0.19‰,均值为0.03‰±0.07‰(n=17,1SD),质量分馏(δ~(202)Hg)均为负值,分布范围为-2.44‰~ -0.42‰,均值为-1.43‰±0.64‰(n=17,1SD),推测塔里木盆地海相原油中汞同位素组成主要继承了藻类等低等生物,藻类可能是塔里木盆地海相油气的主要生油有机质。 |
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其他语种文摘
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Mercury is commonly found in crude oil.Mercury may provide information on the origin and source of oil and gas.This paper studies the mercury content and mercury isotope composition characteristics of marine crude oil in the Tarim Basin,and reveals the correlation between the mercury isotope composition characteristics of crude oil and algae and other lower organisms.The range of mercury content in marine crude oil in the Tarim Basin ranges from 0.71 μg/kg to 23.70 μg/kg,with an average value of 4.00±5.53 μg/kg(n=28,1SD,1 standard deviation).The mercury isotope Mass-Independent Fractionation(Δ~(199)Hg)is mostly positive,the distribution range is from -0.07‰ to 0.19‰,and the average value is 0.03‰±0.07‰(n=17,1SD)and Mass-Dependent Fractionation(δ~(202)Hg)in crude oil is all negative,ranging from -2.44‰ to -0.42‰,with an average value of -1.43‰±0.64‰(n=17,1SD).It is speculated that the mercury isotopic composition of marine crude oil in Tarim Basin is mainly inherited from algae and other lower organisms,and algae may be the main oil generating organic matter of marine oil and gas in Tarim Basin. |
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来源
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天然气地球科学
,2021,32(3):347-355 【核心库】
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DOI
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10.11764/j.issn.1672-1926.2021.03.004
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关键词
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汞
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汞同位素
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海相原油
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塔里木盆地
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地址
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1.
中国石油勘探开发研究院, 北京, 100083
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河南理工大学资源环境学院, 河南, 焦作, 454000
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-1926 |
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学科
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石油、天然气工业 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:6935947
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