Earth Science Frontiers ›› 2008, Vol. 15 ›› Issue (6): 40-43.

• Article • Previous Articles     Next Articles

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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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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