Sources and transport of clay mineral in surface sediments of the sea of northeastern Seychelles Islands

Wu Jiaxing; Liu Shengfa; Cao Peng; Zhang Hui; Huang Mu; Liu Yanguang; Shi Xuefa

doi:10.12284/hyxb2023085

Volume 45 Issue 6

Jun. 2023

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Wu Jiaxing，Liu Shengfa，Cao Peng, et al. Sources and transport of clay mineral in surface sediments of the sea of northeastern Seychelles Islands[J]. Haiyang Xuebao，2023, 45(6)：160–170 doi: 10.12284/hyxb2023085

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Sources and transport of clay mineral in surface sediments of the sea of northeastern Seychelles Islands

doi: 10.12284/hyxb2023085

Wu Jiaxing^1
,,
Liu Shengfa^{1, 2
,
,},
Cao Peng^{1, 2},
Zhang Hui¹,
Huang Mu¹,
Liu Yanguang^{1, 2},
Shi Xuefa^{1, 2}

1.
Key Laboratory of Marine Geology and Metallogenesis, Ministry of Natural Resources, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
2.
Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China

Received Date: 2022-08-31
Rev Recd Date: 2023-01-16

Available Online: 2023-06-27

Publish Date: 2023-06-30

Abstract

Abstract

The relative contents of clay minerals in 34 surface sediment samples were analyzed by X-ray diffraction. The results showed that the content of clay minerals in the surface sediments was illite (35%), palygorskite (20%), smectite (20%), kaolinite (16%) and chlorite (10%). Q-cluster analysis using SPSS software shows that clay minerals can be divided into two provinces (Province I and Province II). Province I covers most of the northern area, and the source is mainly the dust influx from the deserts of Arabian Peninsula, western India and Somali coast; Province II is located at the southwest of the study area, mainly receiving the weathering matters from the granite bedrock of Seychelles Plateau. A comprehensive analysis of the sources of fine particulate matter in the study area and the regional dynamical environment reveals that the southward transport of the aeolian dust from the Arabian Peninsula, western India and the Somali coastal deserts by the South Asian summer monsoon controls the composition of clay minerals in the Province I. The south equatorial low latitude ocean current system promotes the meridional diffusion of fine particles in the study area. The southern Equatorial Counter Current drives the eastward diffusion of kaolinite and chlorite-rich fine materials from Seychelles Plateau.
- sediment,
- clay minerals,
- provenance,
- monsoon,
- ocean currents,
- western Indian Ocean

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References

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