极地研究

极地研究 ›› 2009, Vol. 21 ›› Issue (2): 141-150.

• 研究论文 • 上一篇    下一篇

东南极戴维斯站企鹅粪土沉积物有机地球化学特征

黄婧, 王新明, 孙立广   

  1. 中国科学技术大学极地环境研究室; 中国科学院广州地球化学研究所有机地球化学国家重点实验室;
  • 出版日期:2009-06-30 发布日期:2009-06-30
  • 基金资助:

    We studied molecular geochemical compositions of penguin ornithogenic sediment DG2 from Gardner Island,Vestfold Hills,East Antarctica. The results showed that the aliphatic hydrocarbons mainly consisted of short-chain n-alkanes which likely derived from freshwater algae and bacteria. Meanwhile,the even-carbon fatty acids,such as n-C16,n-C18 and n-C24,dominated alkenoic acids and they principally originated from bacteria,freshwater moss or zooplankton. However,unsaturated fatty acids were predominated by C18...

ORGANIC GEOCHEMISTRY OF PENGUIN ORNITHOGENIC SEDIMENT FROM VESTFOLD HILLS,EAST ANTARCTICA

HUANG Jing, WANG Xin-Meng, SUN Li-An   

  1. 1 Institute of Polar Environment; University of Science and Technology of China; Hefei 230026; China; 2 State Key Laboratory of Organic Geochemistry; Guangzhou Institute of Geochemistry; Chinese Academy of Sciences; Guangzhou 510640; China
  • Online:2009-06-30 Published:2009-06-30

PDF (PC)

1698

被引次数

12

摘要：

研究了位于东南极西福尔丘陵地区Gardner Island企鹅粪土的沉积泥芯DG2的分子地球化学组成特征。DG2沉积物的正烷烃以短链为主,主要来源可能为淡水湖相沉积的藻类和细菌输入。脂肪酸组分偶奇优势明显,以C16,C18和C24一元饱和脂肪酸为主,主要来源可能是浮游动物、细菌及水生苔藓;不饱和脂肪酸含量很低,以C18∶1(Δ9)为主,表明沉积源单一稳定,无大波动。醇类组分以高浓度的植醇、胆甾烷醇和胆甾醇为主,分别代表了植被和企鹅数量,指示了研究区域历史时期的生态变化。综合DG2的生物标志物特征,反映该沉积物的有机质主要来源于企鹅粪、细菌和藻类;沉积环境在不同深度也有变化,0—30cm为氧化环境,30—63cm为还原环境。

关键词: 企鹅粪土沉积, 粪类甾醇, 脂肪酸, 东南极, 企鹅粪土沉积, 粪类甾醇, 脂肪酸, 东南极

Abstract:

We studied molecular geochemical compositions of penguin ornithogenic sediment DG2 from Gardner Island,Vestfold Hills,East Antarctica. The results showed that the aliphatic hydrocarbons mainly consisted of short-chain n-alkanes which likely derived from freshwater algae and bacteria. Meanwhile,the even-carbon fatty acids,such as n-C16,n-C18 and n-C24,dominated alkenoic acids and they principally originated from bacteria,freshwater moss or zooplankton. However,unsaturated fatty acids were predominated by C18...

Key words: penguin ornithogenic sediment, fecal sterol, fatty acid, East Antarctica.