LATE QUATERNARY BENTHIC FORAMINIFERA OF CORE SYS-0803 FROM THE NORTHWESTERN SOUTH YELLOW SEA AND THEIR PALEOENVIROMENTAL SIGNIFICANCE

WANG Feifei; WANG Hong; LIU Jian; GONG Shaojun

doi:10.3724/SP.J.1140.2011.04113

2011 Vol. 31, No. 4

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WANG Feifei, WANG Hong, LIU Jian, GONG Shaojun. LATE QUATERNARY BENTHIC FORAMINIFERA OF CORE SYS-0803 FROM THE NORTHWESTERN SOUTH YELLOW SEA AND THEIR PALEOENVIROMENTAL SIGNIFICANCE[J]. Marine Geology & Quaternary Geology, 2011, 31(4): 113-123. doi: 10.3724/SP.J.1140.2011.04113

Citation:

WANG Feifei, WANG Hong, LIU Jian, GONG Shaojun. LATE QUATERNARY BENTHIC FORAMINIFERA OF CORE SYS-0803 FROM THE NORTHWESTERN SOUTH YELLOW SEA AND THEIR PALEOENVIROMENTAL SIGNIFICANCE[J]. Marine Geology & Quaternary Geology, 2011, 31(4): 113-123. doi: 10.3724/SP.J.1140.2011.04113

LATE QUATERNARY BENTHIC FORAMINIFERA OF CORE SYS-0803 FROM THE NORTHWESTERN SOUTH YELLOW SEA AND THEIR PALEOENVIROMENTAL SIGNIFICANCE

1 Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;
2 Qingdao Institute of Marine Geology, Qingdao 266071, China;
3 Tianjin North China Geological Exploration Bureau, Institute Of Geology, Tianjin 300171, China;
4 Tianjin Exploration Center Of Marine Geology, Tianjin 300171, China

Received Date: 18 April 2011

Revised Date: 10 June 2011

Abstract

Abstract

The Core SYS-0803 was taken from the northwestern South Yellow Sea (35°02' N,121°45' E,water depth 49.00 m, core length 60.30 m), and it recorded the paleoenvironmental changes of the past~140 ka. Q-mode factor analysis was carried out for 248 samples and 25 benthic foraminiferal species, and 4 varimax factors were selected, which account for more than 93.0% of the total variance. Based on the benthic foraminiferal assemblages, four marine and four terrestrial strata were recognized in this core. The late MIS 6 marine layer (depth 53.06~50.28 m) contains typical warm-water benthic foraminifera, implying the occurrence of a warm current. The MIS 5e (depth 33.76~30.55 m) marine layer was remarked by the abundant cold-water benthic foraminifera and ostracods, indicating the development of a strong cold-water mass similar to the modern Cold-water Mass of the Yellow Sea. A short regression (depth 13.80~12.91 m, 12 460~11 572 cal.aBP)was found in the postglacial transgression layer, probably responding to the Younger Dryas event.
- Benthic foraminifera /
- factor analysis /
- sedimentary environment /
- late Quaternary /
- South Yellow Sea

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References

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