PALEOENVIRONMENTAL CHANGES DURING LAST GLACIAL STAGE INFERRED FROM DIATOM RECORDS OF THE DIATOM MAT DEPOSITS FROM TROPICAL PACIFIC

ZHAI Bin; LI Tiegang; XIONG Zhifang

doi:10.3724/SP.J.1140.2014.02089

2014 Vol. 34, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2014 > 34(2): 89-93

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ZHAI Bin, LI Tiegang, XIONG Zhifang. PALEOENVIRONMENTAL CHANGES DURING LAST GLACIAL STAGE INFERRED FROM DIATOM RECORDS OF THE DIATOM MAT DEPOSITS FROM TROPICAL PACIFIC[J]. Marine Geology & Quaternary Geology, 2014, 34(2): 89-93. doi: 10.3724/SP.J.1140.2014.02089

Citation:

ZHAI Bin, LI Tiegang, XIONG Zhifang. PALEOENVIRONMENTAL CHANGES DURING LAST GLACIAL STAGE INFERRED FROM DIATOM RECORDS OF THE DIATOM MAT DEPOSITS FROM TROPICAL PACIFIC[J]. Marine Geology & Quaternary Geology, 2014, 34(2): 89-93. doi: 10.3724/SP.J.1140.2014.02089

PALEOENVIRONMENTAL CHANGES DURING LAST GLACIAL STAGE INFERRED FROM DIATOM RECORDS OF THE DIATOM MAT DEPOSITS FROM TROPICAL PACIFIC

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: 17 May 2013

Revised Date: 09 August 2013

Abstract

Abstract

The diatom mat deposits indicate the blooming and quick deposition of diatoms. They are well developed in the western tropical Pacific during the last glacial stage. The Principal Component Analysis(PCA) of the diatom from the core WPD-03 indicate that the principal component I (PC I) can represent changes in sea surface salinity(SSS), the higher the score, the lower the salinity; whereas the principal component Ⅱ (PC Ⅱ) may indicate sea surface temperature (SST) changes, the higher the score, the higher the temperature. In the late period of MIS3, because of the upwelling of low salinity water, the sea surface salinity was decreased as the nutrients increased. It resulted in the blooming of non mat-forming diatoms. The "low salt cap" will cause the initiation of stratification, and induce giant diatom blooming, which resulted in "Fall dump", thus formed the mat diatom deposits. It may also indicate the input of low salinity seawater into the study area, as one of the reasons for the formation of the diatom mat deposits.
- diatom /
- diatom mat /
- western Pacific /
- last glacial period

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References

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