Advances in Earth Science ›› 2016, Vol. 31 ›› Issue (5): 494-502. doi: 10.11867/j.issn.1001-8166.2016.05.0494.

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In-situ Microanalysis of Mg/Ca Ratio in Planktonic Foraminiferal Shells from the Indonesian Seas

Zhang Peng 1, 2, Rina Zuraida 3, Yuan Honglin 2, Xu Jian 1, 2, *, Gao Lianfeng 4, Zhang Zhenguo 4, Yang Ce 1, 2   

  1. 1. Institute of Cenozoic Geology and Environment, Department of Geology, Northwest University, Xi’an 710069, China;
    2.State Key Laboratory of Continental Dynamics and Department of Geology,Northwest University,Xi’an 710069,China;
    3.Marine Geology Institute, Bandung 40174, Indonesia;
    4.School of Mining Engineering, North China University of Science and Technology, Tangshan 063009, China
  • Received:2016-03-07 Revised:2016-04-30 Online:2016-05-10 Published:2016-05-10
  • About author:Zhang Peng(1987-), male, Qinyang City, He’nan Province,PH.D student. Research areas include marine micropaleontology and paleoceanography.E-mail:zp13@foxmail.comCorresponding author:Xu Jian(1977-), male, Xinyi City, Jiangsu Province, Professor. Research areas include paleooceanography and quaternary geology.E-mail:jx08@live.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China “Characteristics of Mg/Ca in foraminiferal tests from low-latitude seas and their implications in paleo-ocean temperature reconstruction” (No; 41176044)

Zhang Peng, Rina Zuraida, Yuan Honglin, Xu Jian, Gao Lianfeng, Zhang Zhenguo, Yang Ce. In-situ Microanalysis of Mg/Ca Ratio in Planktonic Foraminiferal Shells from the Indonesian Seas[J]. Advances in Earth Science, 2016, 31(5): 494-502.

Laser Ablation-Inductively Coupled Plasma-Mass Spectrometer (LA-ICP-MS) provides an opportunity for us to perform in-situ microanalysis for depth profiling of elements and trace elements/Calcium ratios in calcite foraminiferal shells. In this study, Globigerinoides ruber shells were investigated with a total of 173 ablating positions from a total of 11 core top sediment samples that retrieved from the Indonesian Seas. The results showed changing compositions of Magnesium and Calcium from the inside to the outside surface for both of intra-test and inter-test. Subsequently, Mg/Ca ratios from the LA-ICP-MS microanalysis were compared with Mg/Ca ratios based on regular analyses, suggesting that LA-ICP-MS microanalysis may provide a comparatively safe and convenient way for investigating Mg/Ca ratio of planktonic foraminiferal shells with considerable reliability and accuracy.
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