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Journal of Tropical Oceanography >

2012 , Vol. 31 >Issue 4: 75 - 82

DOI: https://doi.org/10.11978/j.issn.1009-5470.2012.04.010

Marine geomorphology

Diatom records inferred from the diatom mat deposits from low-latitude Western Pacific in the last glacial period

  • ZHAI Bin ,
  • LI Tie-gang ,
  • XIONG Zhi-fang ,
  • LI Jun
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  • 1. Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; 
    2. Key Laboratory of Marine Hydrocarbon Resource and Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, China

Received date: 2012-05-07

  Revised date: 2012-05-26

  Online published: 2012-10-24

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Abstract

The diatom mat deposits are giant “shade flora” diatoms bloom and quickly deposit to the ocean bottom. At the same time, some other species of diatoms also bloom. A total of 101 diatom taxa (including variation) belonging to 40 genera has been identified from the 155 samples based on the two cores of WPD03 and WPD12. It was found that the relative percentage of Thalassionema frauenfeldii is the highest, and that of Thalassionema nitzschioides, Azpeitia nodulifera, Nitzschia marina, and Hemidiscus cuneiformis takes the second place. The five species take about 85% of all diatom species’ relative percentage. The result indicated the five species are the easiest to coexist and bloom with the diatoms forming mats in the diatom mats’ deposit process of the surface water in this area. We estimated that the period for forming mats was a tropical environment of open-ocean circulation.

Key words： diatom; diatom mat; Western Pacific; last glacial

Cite this article

ZHAI Bin , LI Tie-gang , XIONG Zhi-fang , LI Jun . Diatom records inferred from the diatom mat deposits from low-latitude Western Pacific in the last glacial period[J]. Journal of Tropical Oceanography, 2012 , 31(4) : 75 -82 . DOI: 10.11978/j.issn.1009-5470.2012.04.010

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