首页 | 期刊简介 | 编委会 | 投稿指南 | 常用下载 | 联系我们 | 期刊订阅 | In English
引用本文:茅晟懿,朱小畏,孙永革,管红香,吴能友.珠江口盆地Site4B柱状沉积物中脂肪醇分子化合物分布及其来源分析.海洋与湖沼,2014,45(6):1202-1217.
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2649次   下载 2536 本文二维码信息
码上扫一扫!
分享到: 微信 更多
珠江口盆地Site4B柱状沉积物中脂肪醇分子化合物分布及其来源分析
朱小畏,茅晟懿,孙永革,管红香,吴能友
中国科学院广州地球化学研究所,中国科学院广州能源研究所,浙江大学地球科学系;浙江大学地球科学系,中国科学院广州能源研究所,中国科学院广州能源研究所
摘要:
本研究采用色谱质谱(GC-MS)和色谱-同位素质谱(GC-IRMS)方法, 对珠江口盆地Site4B沉积物中脂肪醇分子化合物分布以及单体碳同位素组成进行了研究。结果表明: 长链脂肪醇碳优势指数(CPIC26-34: 9.41 - 24.56)、平均碳链长度(ACLC26-34: 28.85 - 29.99)以及nC26 - nC30脂肪醇平均碳同位素组成(?29.13‰±0.87‰、?32.98‰±1.28‰和?32.73‰±1.61‰)均揭示了nC26 - nC34脂肪醇属于陆源高等植物来源, nC16 - nC20nC24脂肪醇较正的碳同位素组成反映了化合物的海洋细菌来源, 而nC22脂肪醇偏负的碳同位素特征(平均?33.26‰±1.51‰)反映了化学自养细菌来源。Site4B沉积物中的陆源输入主要来自南海周边河流, 从12.7ka BP至今的沉积时期(0 - 80cm, 文中深度均为埋深)和末次冰盛期(102 - 120cm), 其陆源输入主要来自台湾岛河流, 而在19.3 - 12.7ka BP沉积时期(80 - 102cm)和更新世沉积时期(120 - 300cm), 台湾岛、吕宋岛和珠江口河流的陆源贡献普遍较低。Site4B沉积物中的海洋生产力主要来自海洋微生物输入的贡献, 并主要受到海水温差影响; 其中在35 - 150cm层位, 海洋输入和南海暖流的强弱带来的海水温度的高低有关, 而在150 - 300cm层位, 则主要和冰期-间冰期的冷暖气候带来的海水温差有关。
关键词:  珠江口盆地  脂肪醇  碳同位素  陆源输入  海洋生产力
DOI:10.11693/hyhz20131200219
分类号:
基金项目:国家自然科学基金, 41303067 号, 41103043 号; 中国科学院广州能源研究所所长基金, y107r71001 号; 有机地球化学国家重点实验室开放基金, OGL-201209 号
附件
MOLECULE DISTRIBUTION OF ALCOHOL COMPOUNDS IN SITE4B CORE SEDIMENTS FROM THE ZHUJIANG (PEARL) RIVER MOUTH BASIN AND ITS IMPLICATION
zhuxiaowei,maoshengyi,sunyongge,guanhongxiang and wunengyou
Guangzhou Institute of Geochemistry,Guangzhou Institute of Energy Conversion,Zhejiang University,Guangzhou Institute of Energy Conversion,Guangzhou Institute of Energy Conversion
Abstract:
Distribution and carbon isotope composition of alcohol compounds in Site4B sediment in the Zhujiang (Pearl) River Mouth Basin are analyzed by GC-MS (gas chromatography-mass spectrometry) and GC-IRMS (gas chromatography-isotope ratio monitoring mass spectrometry). The results show that the values of carbon preference index (9.41 - 24.56), average chain length (28.85 - 29.99), and the average carbon isotope of nC26, nC28, and nC30 aliphatic alcohol (?29.13‰±0.87‰, ?32.98‰±1.28‰, and ?32.73‰±1.61‰, respectively) indicate a source of terrestrial higher plants for nC26 - nC34 aliphatic alcohols. The carbon isotope compositions of nC16 - nC20 and nC24 aliphatic alcohols were substantially enriched in 13C relative to nC26 - nC34 aliphatic alcohols, suggesting potential source of marine microbe other than terrestrial higher plants; the negative isotope composition of nC22 aliphatic alcohol (?33.26‰±1.51‰) might indicate a potential source of the chemical autotrophic bacteria. The terrigenous inputs in the sediments are dominated by adjacent rivers. Contribution of the Taiwan Island rivers was significant since 12.7ka BP (0 - 80cm) and in the Last Glacial Maximum (102 - 120cm), whereas those of the Taiwan Island, Luzon Arc, and Zhujiang River estuary rivers were generally not significant from 19.3 - 12.7ka BP (80 - 102cm) and in the Pleistocene (120 - 300cm). The marine productivity was contributed by marine microbe that effected heavily by fluctuation in seawater temperature, of which at depths of 35 - 150cm marine-sourced alcohols was related to the seawater temperature fluctuation caused by the change in the strength of the South China Sea warm current, whereas at depths of 150 - 300cm, it was directly related to the seawater temperature variation resulted from cold-warm climate alternation between glacial and interglacial periods.
Key words:  Zhujiang (Pearl) River Mouth Basin  alcohol compound  carbon isotope  terrigenous input  marine productivity
版权所有 海洋与湖沼 Oceanologia et Limnlolgia Sinica Copyright©2008 All Rights Reserved
主管单位:中国科协技术协会 主办单位:中国海洋湖沼学会
地址:青岛市海军路88号  邮编:266400  电话:0532-82898753  E-mail:ols@qdio.ac.cn
技术支持:北京勤云科技发展有限公司