南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

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南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

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中图分类号: P736 P593

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Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

摘要

摘要: 重点探讨了南黄海柱状沉积物中烃类化合物的分子组成特征及其对沉积环境的指示意义，结果显示，沉积柱中总有机碳（TOC）和总氮（TN）具有较好的正相关性，无机氮的影响较弱，这可能跟本区受径流输入的陆源物质的影响较弱有关。上层样品（0～10 cm）中长链正构烷烃占优势，奇偶优势显著，反映了陆源高等植物贡献；藿烷、甾烷的组成则显示该段样品中有机质具有较高的热成熟度；且姥鲛烷（Pr）/植烷（Ph）比值大于1.0，指示沉积环境以氧化为主，这相对不利于海洋源有机质的保存，从而凸显了陆源有机质的贡献。在10～20 cm之间，沉积环境由相对偏氧化向偏还原过渡；20 cm以下表现为强还原性的沉积环境，有机质成熟度较低。中、下层样品中正构烷烃多呈现双峰分布，短链烷烃具有一定的偶奇优势，这可能主要跟海洋浮游生物、藻类及微生物的贡献有关。与渤海烃类化合物的沉积记录进行对比，发现渤海沉积柱中烃类化合物主要跟历史时期不同来源物质的输入及人类活动的影响有关，而南黄海沉积柱中烃类化合物的特征则主要反映了沉积环境和微生物作用对有机质的埋藏保存有重要影响。
- 饱和烃 /
- /
- 柱状沉积物 /
- /
- 分子组成特征 /
- /
- 物源 /
- /
- 沉积环境 /
- /
- 南黄海
Abstract: The vertical variation, composition and sources of sedimentary organic matter and aliphatic hydrocarbons of the core sediments from the south Yellow Sea were exactly evaluated and characterized in terms of the molecular composition of the hydrocarbon compounds and its implication for the sedimentary environment. The results show that there exited a good positive correlation between the total organic carbon and total nitrogen, while the occurrence inorganic nitrogen and its potential influence on the SOM identification is poor, which could be related with the low riverine input of the terrigenous materials in the study area. The long chain nalkanes show a high abundance in the 0～10 cm section with eventoodd predominance of the C2535 nalkanes and a higher Pr/Ph ratio (>1.0), indicating a relatively oxidative sedimentary environment. This condition is unfavorable for the preservation of marine organic matter, and in turn, exhibiting a more contribution from the terrigenous organic matter at this interval, while the compositional patterns of hopanes and steranes suggested the presence of a more mature constituents in the upper sections. The sedimentary setting exchanged from the oxidative condition to the anoxic ones with the increasing depth at the 10～20 cm section. Below the 20 cm layer, the sedimentary environment is more characterized of anoxic condition with a low maturation of the buried organic matter. The alkanes in those downsections showed a bimodal with the even carbon preference of the C1222 nalkanes, which could be derived from marine bacteria, fungi and yeast species. By comparing with the sedimentary records in Bohai Sea which were more related to the variation of the historical fluvial input and human actions, while for the Yellow Sea, the molecular compositional patterns of the typical hydrocarbon compounds indicate the important role of the sedimentary condition and microbial biodegradation for the burial and preservation of organic matter in the core sediments.
- aliphatic hydrocarbons /
- core sediments /
- molecular compositional patterns /
- source /
- sedimentary environment /
- The south Yellow Sea /

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[1]	郭爱鹏, 毛龙江, 莫多闻, 张兴国, 邹春辉, 李烨, 吴又进. 长沙铜官窑遗址剖面地球化学元素特征与物源变化 . 沉积学报, 2023, 41(3): 735-747. doi: 10.14027/j.issn.1000-0550.2021.128
[2]	王姣, 王笑辰, 张峰. 克里雅河沿线沙丘沉积物石英砂表面特征分析 . 沉积学报, 2022, 40(5): 1289-1301. doi: 10.14027/j.issn.1000-0550.2021.044
[3]	张兴泽, 朱丽东, 胡凯程, 张晓, 熊文婷, 王牛牛, 周汪洋, 李凤全. 浙闽沿岸泥质潮滩沉积磁性特征及其物源判别 . 沉积学报, 2022, 40(3): 774-786. doi: 10.14027/j.issn.1000-0550.2020.116
[4]	肖春晖, 王永红, 林间. 近1 Ma以来帕里西维拉海盆沉积物物源和古气候:粒度和黏土矿物特征的指示 . 沉积学报, 2022, 40(2): 508-524. doi: 10.14027/j.issn.1000-0550.2020.091
[5]	郭望, 张卫刚, 李玉宏, 雷迅, 李永红, 陈刚, 张云鹏, 陈磊, 徐学敏. 柴北缘大煤沟组七段页岩地球化学特征——对中侏罗世晚期物源及风化作用的指示及意义 . 沉积学报, 2020, 38(3): 676-686. doi: 10.14027/j.issn.1000-0550.2019.103
[6]	陈淑慧, 侯元立, 邵磊, 黄奇瑜, 乔培军, 崔宇驰, 孟宪博. 台湾始新统—中新统沉积物源与沉积环境 . 沉积学报, 2020, 38(2): 319-330. doi: 10.14027/j.issn.1000-0550.2019.037
[7]	秦亚超, 孙荣涛, 王红, 田振兴, 徐扬, 温珍河. 南黄海西部日照海域海侵沉积地层及其古环境意义 . 沉积学报, 2020, 38(4): 790-809. doi: 10.14027/j.issn.1000-0550.2019.063
[8]	张凯棣, 李安春, 董江, 张晋. 东海表层沉积物碎屑矿物组合分布特征及其物源环境指示 . 沉积学报, 2016, 34(5): 902-911. doi: 10.14027/j.cnki.cjxb.2016.05.009
[9]	乔淑卿. 黄河口及邻近渤海海域悬浮体和沉积物中有机碳、氮的分布特征及其影响因素 . 沉积学报, 2011, 29(2): 354-362.
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[20]	沈平, 陈践发, 彭韵硕. 轻烃中C₆族组成和芴系化合物与沉积环境的关系 . 沉积学报, 1992, 10(1): 68-75.

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文章访问数: 2663
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南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

刊出日期: 2013-02-10

中图分类号: P736 P593

关键词:

饱和烃 /

物源 /

摘要: 重点探讨了南黄海柱状沉积物中烃类化合物的分子组成特征及其对沉积环境的指示意义，结果显示，沉积柱中总有机碳（TOC）和总氮（TN）具有较好的正相关性，无机氮的影响较弱，这可能跟本区受径流输入的陆源物质的影响较弱有关。上层样品（0～10 cm）中长链正构烷烃占优势，奇偶优势显著，反映了陆源高等植物贡献；藿烷、甾烷的组成则显示该段样品中有机质具有较高的热成熟度；且姥鲛烷（Pr）/植烷（Ph）比值大于1.0，指示沉积环境以氧化为主，这相对不利于海洋源有机质的保存，从而凸显了陆源有机质的贡献。在10～20 cm之间，沉积环境由相对偏氧化向偏还原过渡；20 cm以下表现为强还原性的沉积环境，有机质成熟度较低。中、下层样品中正构烷烃多呈现双峰分布，短链烷烃具有一定的偶奇优势，这可能主要跟海洋浮游生物、藻类及微生物的贡献有关。与渤海烃类化合物的沉积记录进行对比，发现渤海沉积柱中烃类化合物主要跟历史时期不同来源物质的输入及人类活动的影响有关，而南黄海沉积柱中烃类化合物的特征则主要反映了沉积环境和微生物作用对有机质的埋藏保存有重要影响。

Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

Publish Date: 2013-02-10

Keywords:

Abstract: The vertical variation, composition and sources of sedimentary organic matter and aliphatic hydrocarbons of the core sediments from the south Yellow Sea were exactly evaluated and characterized in terms of the molecular composition of the hydrocarbon compounds and its implication for the sedimentary environment. The results show that there exited a good positive correlation between the total organic carbon and total nitrogen, while the occurrence inorganic nitrogen and its potential influence on the SOM identification is poor, which could be related with the low riverine input of the terrigenous materials in the study area. The long chain nalkanes show a high abundance in the 0～10 cm section with eventoodd predominance of the C2535 nalkanes and a higher Pr/Ph ratio (>1.0), indicating a relatively oxidative sedimentary environment. This condition is unfavorable for the preservation of marine organic matter, and in turn, exhibiting a more contribution from the terrigenous organic matter at this interval, while the compositional patterns of hopanes and steranes suggested the presence of a more mature constituents in the upper sections. The sedimentary setting exchanged from the oxidative condition to the anoxic ones with the increasing depth at the 10～20 cm section. Below the 20 cm layer, the sedimentary environment is more characterized of anoxic condition with a low maturation of the buried organic matter. The alkanes in those downsections showed a bimodal with the even carbon preference of the C1222 nalkanes, which could be derived from marine bacteria, fungi and yeast species. By comparing with the sedimentary records in Bohai Sea which were more related to the variation of the historical fluvial input and human actions, while for the Yellow Sea, the molecular compositional patterns of the typical hydrocarbon compounds indicate the important role of the sedimentary condition and microbial biodegradation for the burial and preservation of organic matter in the core sediments.

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南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

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Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

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南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

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Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

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南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

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出版历程

Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

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出版历程

目录

南黄海柱状沉积物中烃类化合物的地球化学特征及其对沉积环境的指示

English Abstract

Geochemical Characteristics of Hydrocarbons in the Core Sediments from the South Yellow Sea and Its Implication for the Sedimentary Environment

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期刊在线

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