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Vast laminated diatom mat deposits from the west low-latitude Pacific Ocean in the last glacial period

  • Articles / Oceanology
  • Published:
Chinese Science Bulletin

Abstract

Diatoms are one of the predominant contributors to global carbon fixation by accounting for over 40% of total oceanic primary production and dominate export production. They play a significant role in marine biogeochemistry cycle. The diatom mat deposits are results of vast diatoms bloom. By analysis of diatom mats in 136°00′−140°00′E, 15°00′−21°00′N, Eastern Philippines Sea, we identified the species of the diatoms as giant Ethmodiscus rex (Wallich) Hendey. AMS 14C dating shows that the sediments rich in diatom mats occurred during 16000−28600 a B.P., which means the bloom mainly occurred during the last glacial period, while there are no diatom mat deposits in other layers. Preliminary analysis indicates that Antarctic Intermediate Water (AAIW) expanded northward and brought silicate-rich water into the area, namely, silicon leakage processes caused the bloom of diatoms. In addition, the increase of iron input is one of the main reasons for the diatom bloom.

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Authors and Affiliations

  1. Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China

    Bin Zhai, TieGang Li, FengMing Chang & QiYuan Cao

  2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China

    Bin Zhai

Authors
  1. Bin Zhai
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  2. TieGang Li
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  3. FengMing Chang
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  4. QiYuan Cao
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Corresponding author

Correspondence to TieGang Li.

Additional information

Supported by the National Basic Research Program (Grant No. 2007CB815903), National Natural Science Foundation of China (Grant No. 40776031) and Pilot Project of the National Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-221)

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Zhai, B., Li, T., Chang, F. et al. Vast laminated diatom mat deposits from the west low-latitude Pacific Ocean in the last glacial period. Chin. Sci. Bull. 54, 4529–4533 (2009). https://doi.org/10.1007/s11434-009-0447-1

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  • DOI: https://doi.org/10.1007/s11434-009-0447-1

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