详细信息
冲绳海槽唐印和第四与那国热液区热液产物中烷烃组成和来源
The composition and source of hydrocarbons in the hydrothermal products of Tangyin and Yonaguni Knoll IV hydrothermal fields from the Okinawa Trough
文献类型:期刊文献
中文题名:冲绳海槽唐印和第四与那国热液区热液产物中烷烃组成和来源
英文题名:The composition and source of hydrocarbons in the hydrothermal products of Tangyin and Yonaguni Knoll IV hydrothermal fields from the Okinawa Trough
作者:黄鑫[1,2,3,4];李隆威[1,3];王汶卓[1,3];王昱淏[1,3];陈帅[2,4];康语柔[1,3]
机构:[1]广东海洋大学海洋与气象学院,近海海洋变化与灾害预警重点实验室,湛江524088;[2]崂山实验室海洋矿产资源评价与探测技术功能实验室,青岛266237;[3]广东海洋大学广东省高等学校陆架及深远海气候、资源与环境重点实验室,湛江524088;[4]中国科学院海洋研究所海洋地质与环境重点实验室,青岛266071
年份:2023
卷号:43
期号:5
起止页码:181
中文期刊名:海洋地质与第四纪地质
外文期刊名:Marine Geology & Quaternary Geology
收录:CSTPCD、、CSCD2023_2024、北大核心、CSCD、北大核心2020
基金:国家自然科学基金“基于沉积记录的冲绳海槽北部热液活动史和热液物质贡献研究”(42006065);中国科学院战略性先导科技专项(B类)“热液/冷泉区岩浆物质贡献与流体化学过程”(XDB42020402);中国科学院海洋地质与环境重点实验室开放基金课题“冲绳海槽北部沉积记录对热液活动物质贡献的指示”(MGE2021KG04),“碎屑组分和生物扰动对加瓜海脊铁锰结壳生长的影响”(MGE2022KG9);广东省研究生示范课程建设项目“地球化学示范课程”(040206032301)。
语种:中文
中文关键词:正烷烃;碳同位素组成;唐印热液区;第四与那国热液区;冲绳海槽
外文关键词:n-alkanes;carbon isotope composition;Tangyin hydrothermal field;Yonaguni Knoll IV hydrothermal field;Okinawa Trough
中文摘要:通过气相色谱-质谱联用仪(GC-MS)和气相色谱-同位素质谱仪(GC-IRMS),分别分析了冲绳海槽南部唐印和第四与那国热液区热液硫化物与热液沉积物中烷烃含量和正烷烃单体碳同位素组成特征。热液产物样品中正烷烃显示出明显的双峰分布,高分子正烷烃显示出明显的奇数碳优势,其丰度最大值位于C_(31)处;低分子正烷烃显示出偶数碳优势,其丰度最大值位于C_(18)处。正烷烃的分布特征以及正烷烃碳同位素组成表明,样品中正烷烃主要来源于热液微生物代谢活动和陆源高等植物的输入,其中,低分子的正烷烃主要来源于热液微生物代谢活动,而高分子的正烷烃主要来源于陆源高等植物。热液硫化物样品中低分子正烷烃含量和比重都高于热液沉积物,表明热液硫化物中热液微生物活动可能更加繁盛。热液硫化物中正烷烃单体的δ^(13)C表现出随碳原子个数增加,同位素值减小的趋势,暗示该区非生物合成有机质的贡献可能不能忽略。
外文摘要:The hydrothermal sulfide and sediment of the Tangyin and Yonaguni KnollⅣhydrothermal fields in the southern Okinawa Trough were analyzed in gas chromatography-mass spectrometry(GC-MS)and gas chromatography-isotope ratio mass spectrometry(GC-IRMS),by which the abundances of hydrocarbons and the individual C isotope compositions of n-alkane were determined.The n-alkanes in the hydrothermal products conformed to a bimodal distribution,and exhibited an odd-to-even predominance of high molecular weight n-alkanes with maxima at C_(31) and an even-to-odd predominance of low molecular weight n-alkanes with maxima at C_(18).The distribution and individual carbon isotopic compositions of n-alkanes suggest that the low molecular weight n-alkanes in hydrothermal products may be mainly the result of the metabolic activity of submarine hydrothermal microorganisms,and the high-molecular weight n-alkanes in hydrothermal products may be derived from mainly the terrigenous inputs.The content and proportion of low-molecular n-alkanes in hydrothermal sulfides are higher than those of hydrothermal sediment,indicating that hydrothermal microbial activity might be more flourishing in hydrothermal sulfide.Theδ^(13)C values of the n-alkanes in the hydrothermal sulfide samples tend to decrease as the number of carbon atoms increased,which suggest that the abiogenic contribution to the source of hydrocarbons in hydrothermal sulfides shall not be ignored.
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