Basic geochemical characteristics of sediments in the Okinawa trough

Zhao Yiyang; He Lijuan; Zhang Xiulian; Jia Fengmei; Xia Qing

doi:10.1007/BF02850413

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Basic geochemical characteristics of sediments in the Okinawa trough

Updated：2023-05-16

- Basic geochemical characteristics of sediments in the Okinawa trough
- Journal of Oceanology and Limnology Vol. 4, Issue 3, Pages: 278-285(1986)
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850413
  CLC：
- Published：1986
- Accepted：
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Yiyang, Z., Lijuan, H., Xiulian, Z. et al. Basic geochemical characteristics of sediments in the Okinawa trough., Chin. J. Ocean. Limnol. 4, 278–285 (1986). https://doi.org/10.1007/BF02850413
DOI：

Yiyang, Z., Lijuan, H., Xiulian, Z. et al. Basic geochemical characteristics of sediments in the Okinawa trough., Chin. J. Ocean. Limnol. 4, 278–285 (1986). https://doi.org/10.1007/BF02850413 DOI：

摘要

Abstract

A total of 21 elements

Sr Ba

Cd and Corg(organic carbon)

was determined in the trough. Average contents of most elements were found to be higher in the trough bottom than in the western and eastern slopes. We call these elements the indicator elements because of their “transition” property. This is in keeping with the “intermediate” geographical position of the trough where the continental crust turns to oceanic crust. Though the authigenic fraction of some elements here increases

the detrital fraction of most elements is still dominant

indicating that the influences of terrigenous and volcanic detrital materials on the trough sediments are still dominant. The abundant biogenous component in the trough is characterized by the increase of Ca

and Corg contents. Ca existes mainly in the form of CaCo3 that is mostly found in various shells. Sr often easily replaces Ca within the shells. A belt-shaped distribution pattern of elements was found in the south and a “block” pattern in the north trough. Such distribution patterns are directly controlled by water depth

topography

current sediment type

and mineral

biological

and volcanic processes.

关键词

Keywords

references

Chen Yuwei, Zhao Yiyang, Liu Juying and Qiu Jiangen, 1982. Distribution characteristics of226Ra in sediments of the East China Sea and determination of sedimentation rate in the nearshore region.Oceanologia et Limnologia Sinica 13(4): 380–387. (in Chinese with English abstract)

Goldberg, E. D. and G. O. S. Arrhenius, 1958. Chemistry of Pacific pelagic sediments.Geochim. Cosmochim. Acta 13(2/3): 153–212.

Krishnaswami, S., 1976. Authigenic, transition elements in Pacific pelagic clays.Geochim. Cosmochim. Acta 40 (4): 425–434.

Zhao Yiyang, 1983. Geochemistry of some elements in sediments of the East China Sea.Chin. J. Oceanol. Limnol. 1(2): 210–222.

Zhao Yiyang, 1983. Some geochemical patterns of shelf sediments of the China Seas.Scientia Geologica Sinica 4:307–314. (in Chinese with English abstract).

Zhao Yiyang and Yu Deke, 1983. Geochemical analysis of the sediments of the Huanghai Sea.Oceanologia et Limnologia Sinica 14(5):432–446 (in Chinese with English abstract).

Zhao Yiyang et al, 1981. Geochemistry of Fe, Mn, Ti and P in the seabed sediments of the Taiwan Bank, China.Acta Geologica Sinica 55(2):118–126. (in Chinese with English abstract).

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