Study on prediction method of sediment distribution trend in seafloor hydrothermal field based on topography: A case study of Dragon Horn area on the Southwest Indian Ridge

Pan Donglei; Tao Chunhui; Liao Shili; Deng Xianmimg; Zhang Guoyin

doi:10.12284/hyxb2021043

Volume 43 Issue 3

Apr. 2021

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Pan Donglei，Tao Chunhui，Liao Shili, et al. Study on prediction method of sediment distribution trend in seafloor hydrothermal field based on topography: A case study of Dragon Horn area on the Southwest Indian Ridge[J]. Haiyang Xuebao，2021, 43(3)：157–164 doi: 10.12284/hyxb2021043

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Study on prediction method of sediment distribution trend in seafloor hydrothermal field based on topography: A case study of Dragon Horn area on the Southwest Indian Ridge

doi: 10.12284/hyxb2021043

Pan Donglei^{1, 2
,},
Tao Chunhui^{1, 2, 3
,
,},
Liao Shili^{1, 2},
Deng Xianmimg^{1, 2},
Zhang Guoyin^{1, 2}

1.
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
Key Laboratory of Submarine Geoscience, Ministry of Natural Resources, Hangzhou 310012, China
3.
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200240, China

Received Date: 2020-03-08
Rev Recd Date: 2020-04-18

Available Online: 2021-02-24

Publish Date: 2021-04-23

Abstract

Abstract

The sediments in the hydrothermal field received a large amount of hydrothermal input, and their mineral compositions and geochemical spatial distribution characteristics are effective indicators for polymetallic sulfide exploration. Due to gravity, sediments in the mid-ocean ridge area are mainly distributed in low-lying and flat terrain areas. In order to explore the influence of topographical factors on the distribution of sediments in the hydrothermal field, this paper proposes a prediction method of sediment distribution trend in seafloor hydrothermal field based on topography data through ArcGIS, and analyzes the topographic data of Dragon Horn area on the Southwest Indian Ridge, including the extraction gravity transport direction of sediment, the estimation of sediment accumulation amount, the extraction of submarine ditch valley and the division of sediment source area. By comparison and verification with the interpretation results of the seafloor camera data of the study area, we found that the prediction results are in good agreement with the actual distribution range of the sediments in the study area, indicating that this method can effectively indicate the distribution of sediments in the submarine hydrothermal field under the influence of terrain to a certain extent. This method has certain guiding significance for the exploration of submarine sulfide minerals, and could provides a reference basis for the setting of sampling stations for seafloor sediments and the delineation of polymetallic sulfide mineralization prospects.
- sediment distribution,
- seafloor topography,
- ArcGIS,
- Southwest Indian Ridge,
- seafloor prospecting

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References(40)

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