Rare earth element composition of the surface sediments from the south Bay of Bengal and its implications for provenance

SUN Xingquan; LIU Shengfa; LI Jingrui; CAO Peng; ZHANG Hui; ZHAO Guangtao; Somkiat Khokiattiwong; Narumol Kornkanitnan; SHI Xuefa

doi:10.16562/j.cnki.0256-1492.2019102801

2020 Vol. 40, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2020 > 40(2): 80-89

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SUN Xingquan, LIU Shengfa, LI Jingrui, CAO Peng, ZHANG Hui, ZHAO Guangtao, Somkiat Khokiattiwong, Narumol Kornkanitnan, SHI Xuefa. Rare earth element composition of the surface sediments from the south Bay of Bengal and its implications for provenance[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 80-89. doi: 10.16562/j.cnki.0256-1492.2019102801

Citation:

SUN Xingquan, LIU Shengfa, LI Jingrui, CAO Peng, ZHANG Hui, ZHAO Guangtao, Somkiat Khokiattiwong, Narumol Kornkanitnan, SHI Xuefa. Rare earth element composition of the surface sediments from the south Bay of Bengal and its implications for provenance[J]. Marine Geology & Quaternary Geology, 2020, 40(2): 80-89. doi: 10.16562/j.cnki.0256-1492.2019102801

Rare earth element composition of the surface sediments from the south Bay of Bengal and its implications for provenance

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
3.
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
4.
Marine and Coastal Resources Research and Development Institute, Department of Marine and Coastal Resources, Bangkok 10210, Thailand

More Information

Corresponding author: LIU Shengfa, liushengfa@fio.org.cn

Received Date: 28 October 2019

Revised Date: 18 December 2019

Publish Date: 25 April 2020

Abstract

Abstract

Rare earth element (REE) compositions and their spatial distribution pattern for 98 surface sediment samples collected from the southern part of the Bay of Bengal are carefully studied in this paper. The main sources of sediments are identified and the sediment transport modes discussed in combination with the hydrodynamic environment features. The results suggest that the total concentrations of rare earth elements in the surface sediments of the study area vary between 67.62 μg/g and 180.67 μg/g, with an average at 100.85 μg/g. The samples are rich in light REE and uniform in heavy REE with an obvious negative anomaly of Eu. Based on the major parameters of REE, the study area can be subdivided into two provinces, the province Ι located in the west part of the study area and the province Ⅱ located in the east. According to the chondrite-normalized La/Yb-Sm/Nd diagram for provenance identification, most of the surface sediments of the study area is provided by the erosion of the Himalayan Mountain and transported by the Ganges-Brahmaputra River. The subordinate source is the Indian Peninsula, of which the sediments were transported by the Godavari River-Krishna River in the province Ι located in the west part of the study area. The transportation of sediments in different source areas is mainly controlled by the seasonal surface circulation driven by the Indian monsoon system.
- Bengal Fan /
- Rare earth elements /
- Provenance /
- Monsoon circulation /
- Northeast Indian Ocean

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