SEDIMENT PROVENANCE AND FLUXES IN THE NORTHERN OKINAWA TROUGH DURING THE LAST 88 KA

ZHU Aimei; SHI Xuefa; ZOU Jianjun; WU Yonghua; ZHANG Hui; BAI Yazhi

doi:10.16562/j.cnki.0256-1492.2015.05.001

2015 Vol. 35, No. 5

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ZHU Aimei, SHI Xuefa, ZOU Jianjun, WU Yonghua, ZHANG Hui, BAI Yazhi. SEDIMENT PROVENANCE AND FLUXES IN THE NORTHERN OKINAWA TROUGH DURING THE LAST 88 KA[J]. Marine Geology & Quaternary Geology, 2015, 35(5): 1-8. doi: 10.16562/j.cnki.0256-1492.2015.05.001

Citation:

ZHU Aimei, SHI Xuefa, ZOU Jianjun, WU Yonghua, ZHANG Hui, BAI Yazhi. SEDIMENT PROVENANCE AND FLUXES IN THE NORTHERN OKINAWA TROUGH DURING THE LAST 88 KA[J]. Marine Geology & Quaternary Geology, 2015, 35(5): 1-8. doi: 10.16562/j.cnki.0256-1492.2015.05.001

SEDIMENT PROVENANCE AND FLUXES IN THE NORTHERN OKINAWA TROUGH DURING THE LAST 88 KA

1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;
2. University of Chinese Academy of Sciences, Beijing 100049;
3. Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;
4. Qingdao National Laboratory for Marine Science and Technology, Functional Laboratory for Marine Geology and Environment, Qingdao 266071

Received Date: 15 November 2014

Revised Date: 13 February 2015

Abstract

Abstract

The history of terrigenous detritus accumulation and paleoenvironment since the last 88 ka was reconstructed using the results of rare earth elements (REEs) from 131 samples from the Northern Okinawa Trough. The results show that the contents of ∑REEs vary between 111~171.3 μg/g with an average value of 130.9 μg/g. The apex of ∑REEs occurs in MIS 2, while the low values exist in Holocene. Negative Cerium anomaly exists in MIS 4, which is mainly controlled by the ventilation of deep water. Provenance analysis suggests that the sediment components are dominated by terrigenous detritus during MIS 2 and MIS 5a, while the contribution of volcanic detritus significantly increases over the last 8 ka. There exists provenance difference between MIS 2-MIS4, and the early and late last deglacial periods. Both sea level and East Asian Summer Monsoon are the main controlling factors for terrigenous detritus accumulation in the northern Okinawa Trough.
- rare earth elements /
- sediment provenance /
- Ce negative anomaly /
- sediment fluxes evolution /
- northern Okinawa Trough

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References

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