Study of Okinawa Trough sedimentation rates and paleoenvironment based on uranium series isotope

Li Feng-ye; Shi Yu-lan

doi:10.1007/BF02850559

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Study of Okinawa Trough sedimentation rates and paleoenvironment based on uranium series isotope

Updated：2023-05-16

- Study of Okinawa Trough sedimentation rates and paleoenvironment based on uranium series isotope
- Journal of Oceanology and Limnology Vol. 14, Issue 4, Pages: 373-377(1996)
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850559
  CLC：
- Online First：31 January 2013，
  
  Published：1996
- Accepted：
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Feng-ye, L., Yu-lan, S. Study of Okinawa Trough sedimentation rates and paleoenvironment based on uranium series isotope., Chin. J. Ocean. Limnol. 14, 373–377 (1996). https://doi.org/10.1007/BF02850559
DOI：

Feng-ye, L., Yu-lan, S. Study of Okinawa Trough sedimentation rates and paleoenvironment based on uranium series isotope., Chin. J. Ocean. Limnol. 14, 373–377 (1996). https://doi.org/10.1007/BF02850559 DOI：

摘要

Abstract

Spectrometry of238U

234U

230Th and

232Th in three Okinawa Trough cores showed that

based on the230Th/232Th activity ratio

the sedimentation rates were about 2.5cm/ka

2.8cm/ka and 8.5cm/ka respectively during the Holocene and about 20.1cm/ka

12.29cm/ka

8.8cm/ka and 12.6cm/ka respectively during the Würm glacial. To examine the past global climatic and oceanographic changes

the stable oxygen isotopes δ18O and CaCO3 were measured. The Th content and Th/U ratio showed that variations of terrigenous material input from the continental shelf were associated with glacial and interglacial changes and sea level fluctuations.

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Keywords

references

Bernat, Michel., 1974. Systematics in Uranium-Ionium dating of sediments. Earth and Planetary Science Letters21: 310–314.

Demaster, D. J., Mckee, B. A., Nittrouer, C. A., 1985. Rates of Sediment reworking at the Hebble site based on measurements of234Th,137Cs and210Pb.Marine Geology 66: 133–148.

Keigwin, L. D., Jones, G. A., 1989. Glacial—Holocene stratigraphy, chronology and paleoceanographic observations on some North Altantic sediment drifts.Deep-Sea Research,36(6): 845–867.

Newman, S., Finkel, R. C., MacDougall, J. D., 1983.230Th-238U disequilibrium systemactics in oceanic tholeiites from 21 °N on the East Pacific Rise.Earth and Planetary Science Letters 65: 17–33.

Yang Yongliang, 1990. Uranium-series disequilibrium studies of the East Equatorial Pacific sediment, University of Cambridge, Ph, D. Thesis.

Zhao Qiyuan, 1988. Marine geochemistry. Geologic press, Beijing, 82–98.

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