Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers

Li Peiquan; Liu Zhihe

doi:10.1007/BF02844995

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Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers

OriginalPaper | Updated：2023-05-16

- Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers
- Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers
- 海洋湖沼学报（英文） 1987年5卷第2期页码：109-117
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
  
  Contribution No. 1408, Institute of Oceanology, Academia Sinica, Qingdao.
- DOI：10.1007/BF02844995
  中图分类号：
- 纸质出版：1987
- Accepted：
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Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers[J]. 海洋湖沼学报（英文）, 1987,5(2):109-117.

Peiquan, L., Zhihe, L. Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers., Chin. J. Ocean. Limnol. 5, 109–117 (1987). https://doi.org/10.1007/BF02844995
Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers[J]. 海洋湖沼学报（英文）, 1987,5(2):109-117. DOI： 10.1007/BF02844995.

Peiquan, L., Zhihe, L. Geochemical studies of U, Th, Ra,40K in seciments of the China Sea and adjacent sea area, and lower reaches of several Chinese Rivers., Chin. J. Ocean. Limnol. 5, 109–117 (1987). https://doi.org/10.1007/BF02844995 DOI：

摘要

Abstract

Geochemical studies of the U

and40K in surface sediments of the China Sea and adjacent sea areas

the lower reaches of the Huanghe and Changjiang Rivers and the estuaries of the Zhujiang and Rongjiang Rivers were carried out with a model 8180-4K multichannel Ge(Li)γ spectrometer in 1981–1985. The mean values of U

40K are about 2.11 ppm

7.67×10−13g/g

11.00 ppm

and 2.33 ppm respectively

in the China Sea

the Okinawa Trough

and the Changjiang and Huanghe River estuaries. The distribution of the four isotopes is uniform in the above zone. The contents of U and Th in the sediments of the Zhujiang and Rongjiang Rivers and the Fujian coast are 1–4 times higher than those of the above zone and are related to the granite and radioactive ore present in the upper reaches of these rivers or the adjacent mountains. The distributions of U

and40K are related to the physico-chemical property

redox state

geological type and grain size of the sediment

and biotic activity.

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Keywords

references

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

Cochran J. K., 1979. The geochemistry of226Ra and228Ra in marine deposits. Ph. D. Thesis, Yale University, New Haven, Conn., 1–50.

Li Peiquan, Liu Zhihe et al., 1983. Determinations of U, Ra, Th,40K and137Cs in the surface sediments in the off-shore area of western Bohai Sea with Ge(Li)γ spectrometer.Oceanologia et Limnologia Sinica 14(4): 333–341 (in Chinese with English abstract).

Li Peiquan, Liu Zhihe, Lu Guangshan and Su Xieming, 1984. The geochemical studies of U, Th, Ra, K (40K) in sediments of Okinawa Trough.Oceanologia et Limnologia Sinica 15(5): 457–467 (in Chinese with English abstract).

Liu Zhihe and Zhao Shuqian 1983. Measurement of137Cs,40K, U, Ra, Th in sediment with Ge(Li)γ spectrometer.Marine Sciences 1: 21–24 (in Chinese with English abstract).

Yokoyama, Y., and Huu-Van Nguyen, 1980. Direct and non-destructive dating of marine sediments manganese nodules, and corals by high resolution gamma-ray spectrometry.Uchida Rokakuho: 247–259.

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

Zhao Yiyang, 1980. The geochemistry of Uranium in sediment in Bohai Bay, China.Geochemica 1: 101–105 (in Chinese).

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