地学前缘 ›› 2008, Vol. 15 ›› Issue (6): 40-43.

• 论文 • 上一篇    下一篇

利用富钴结壳碳酸盐基岩有孔虫矿物标型重建古海洋温度

  

  1. 1深圳职业技术学院, 广东 深圳 518055
    2中国地质大学 地质过程与矿产资源国家重点实验室, 北京 100083
    3国家海洋局第二海洋研究所 海底科学重点实验室, 浙江 杭州 310012
    4石家庄经济学院 资源学院, 河北 石家庄 050031
    5中国地质大学(武汉), 湖北 武汉 430074

  • 出版日期:2008-06-20 发布日期:2008-06-20
  • 通讯作者: 李胜荣。E-mail: lisr@cugb.edu.cn
  • 作者简介:佟景贵(1972—),男,博士,矿物学专业,主要从事成因与找矿矿物学和环境与生命矿物学的研究工作。E-mail: tongjinggui@yahoo.com.cn
  • 基金资助:

    国家重点基础研究发展计划“973”项目(2007CB815604);国家大洋专项重点研究项目(DY105-01-04-14,DY105-01-01-01)

Reconstruction of sea surface temperature of paleaoocean using biomineral of fossil foraminifer in the carbonate basement of the ferromanganese crust.

  1. 1Shenzhen College of Polytechnic, Shenzhen 518055, China
    2State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
    3Key Laboratory of Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
    4School of Resources, Shijiazhuang Institute of Economy, Shijiazhuang 050031, China
    5China University of Geosciences(Wuhan), Wuhan, 430074, China

  • Online:2008-06-20 Published:2008-06-20

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摘要：

重建古海洋海表温度(SST),是研究地质历史时期气候变化控制过程的关键。组成有孔虫化石的矿物Mg/Ca值是海水温度的可靠代用指标,是重建古海洋SST的一个非常好的手段。麦哲伦海山区的富钴结壳和基岩中普遍存在有孔虫化石,这对重建该区的SST有重要意义。利用LAICPMS测得西太平洋麦哲伦海山区富钴结壳碳酸盐基岩中8颗浮游有孔虫化石Globigerinoides sacculifer的Mg/Ca值为384±036(mmol/mol), 通过线性公式:T(℃)=2898 Mg/Ca(mmol/mol)+1376及已有的定年数据,得到091 Ma±西太平洋麦哲伦海山区海表温度为249+11/-10 ℃,未能检索到前人关于该区091 Ma±前海表温度数据。

关键词: 富钴结壳; Mg/Ca; 有孔虫; 生物矿物; SST

Abstract:

Reconstruction of past sea surface temperatures（SST）is essential for understanding processes that control climate change throughout the Earths history. The Mg/Ca ratio of the foraminifer is a reliable sea water temperature proxy and is a good tool to reconstruct the SST of palaeoocean. The foraminifer samples were collected from the carbonate basement of a ferromanganese crust from a Magellan seamount in the West Pacific and their age was 091 Ma±. Eight of them were examined by LAICPMS for their Mg/Ca ratios. The average of their Mg/Ca ratio was 384±036(mmol/mol). Based on the linear fitting(T(℃)＝2898 Mg/Ca(mmol/mol)+1376), the SST of the area around the Magellan Seamounts around 091 Ma ago was given at 249+11/-10 ℃.

Key words:

Key words: ferromanganese crust; Mg/Ca; foraminifera; biomineral; SST

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