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Clay mineral compositions in surface sediments of the Ganges-Brahmaputra-Meghna river system of Bengal Basin, Bangladesh
Khan, Md Hafijur Rahaman2; Liu, Jianguo1; Liu, Shengfa1,3; Seddique, Ashraf Ali4; Cao, Li2; Rahman, Ananna2
2019
Source PublicationMARINE GEOLOGY
ISSN0025-3227
Volume412Pages:27
AbstractClay minerals are significant indicators that can be used to identify sources and transport patterns of both fluvial and marine sediments. The Ganges, Brahmaputra, and Surma-Meghna (SM) rivers are the most important rivers of the Bengal Basin (BB), loading a large amount of sediments from the Himalayas into the Bay of Bengal. Clay minerals of 132 surface sediment samples from the Ganges-Brahmaputra-Meghna (GBM) river system have been analyzed with X-ray diffraction (XRD) to show the variation of clay mineral assemblages in the sediments from upstream to downstream for the major rivers of the BB and to verify the validity of clay minerals as an important index for sediment provenance in the Bay of Bengal after these sediments are discharged into the neighboring seas. The results show that the clay mineral assemblage in the GBM river system consists dominantly of illite (average 66%), with smaller amounts of smectite, kaolinite, and chlorite (8%, 8%, and 17%, respectively). Smectite is diagnostic in the Ganges River sediments, with a higher content (23%) than that in the Brahmaputra (2%) and the SM River (1%); however, chlorite (21%) is high in the SM River sediments and the Brahmaputra River sediments have a high illite percentage (77%). Downstream, the smectite percentages in the Ganges River increase significantly, but the kaolinite percentages in sediments of the SM River increase slightly. Due to the continuous mixture of first the Brahmaputra River and then the SM River discharge, the clay mineral assemblages of this river system's sediments change greatly, e.g., smectite percentages decrease from 23% in the Ganges River to 8% in the GBM River via the stretch with 12% in the Ganges-Brahmaputra confluence river.
DepartmentOMG
KeywordClay minerals Surface sediments Bengal Basin Ganges-Brahmaputra River system
DOI10.1016/j.margeo.2019.03.007
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17953
Collection中科院边缘海地质重点实验室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Minist Nat Sources, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China
5.Jatiya Kabi Kazi Nazrul Islam Univ, Dept Environm Sci & Engn, Trishal 2220, Mymensingh, Bangladesh
Recommended Citation
GB/T 7714
Khan, Md Hafijur Rahaman,Liu, Jianguo,Liu, Shengfa,et al. Clay mineral compositions in surface sediments of the Ganges-Brahmaputra-Meghna river system of Bengal Basin, Bangladesh[J]. MARINE GEOLOGY,2019,412:27, 36.
APA Khan, Md Hafijur Rahaman,Liu, Jianguo,Liu, Shengfa,Seddique, Ashraf Ali,Cao, Li,&Rahman, Ananna.(2019).Clay mineral compositions in surface sediments of the Ganges-Brahmaputra-Meghna river system of Bengal Basin, Bangladesh.MARINE GEOLOGY,412,27.
MLA Khan, Md Hafijur Rahaman,et al."Clay mineral compositions in surface sediments of the Ganges-Brahmaputra-Meghna river system of Bengal Basin, Bangladesh".MARINE GEOLOGY 412(2019):27.
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