Sedimentary record and paleoceanographic implications of the core on the continental shelf off the Ross Sea since 15 ka

Zhao Renjie; Chen Zhihua; Liu Helin; Tang Zheng; Huang Yuanhui; Li Yunhai; Ge Shulan

doi:10.3969/j.issn.0253-4193.2017.05.008

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Zhao Renjie, Chen Zhihua, Liu Helin, Tang Zheng, Huang Yuanhui, Li Yunhai, Ge Shulan. Sedimentary record and paleoceanographic implications of the core on the continental shelf off the Ross Sea since 15 ka[J]. Haiyang Xuebao, 2017, 39(5): 78-88. doi: 10.3969/j.issn.0253-4193.2017.05.008

Citation:

Zhao Renjie, Chen Zhihua, Liu Helin, Tang Zheng, Huang Yuanhui, Li Yunhai, Ge Shulan. Sedimentary record and paleoceanographic implications of the core on the continental shelf off the Ross Sea since 15 ka[J]. Haiyang Xuebao, 2017, 39(5): 78-88. doi: 10.3969/j.issn.0253-4193.2017.05.008

Citation:

Zhao Renjie, Chen Zhihua, Liu Helin, Tang Zheng, Huang Yuanhui, Li Yunhai, Ge Shulan. Sedimentary record and paleoceanographic implications of the core on the continental shelf off the Ross Sea since 15 ka[J]. Haiyang Xuebao, 2017, 39(5): 78-88. doi: 10.3969/j.issn.0253-4193.2017.05.008

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Sedimentary record and paleoceanographic implications of the core on the continental shelf off the Ross Sea since 15 ka

doi: 10.3969/j.issn.0253-4193.2017.05.008

1.
Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Techology, Qingdao 266061, China
2.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 2016-10-11
Rev Recd Date: 2016-11-14

Abstract

Abstract

In this study, based on the multi-parameters measurements, including AMS¹⁴C dating, organic carbon, grain size and factor analysis of grain size data, of gravity core JB04, collected in the continental shelf of the Ross Sea during the 31^st China Antarctic scientific expedition, the sedimentary strata and processes were studied and the paleocenography significance was discussed. The results shown that the age of the core sediment is 15 ka, and the core sediment can be divided into 3 types, namely as the normal ice-sea deposition, low marine hydrodynamic deposition and high marine hydrodynamic deposition, respectively. According to the distributions of sediment deposition strata, the core can be divided into 4 layers. From the bottom to the top, the first deposited layer was formed in the marine environment while the ocean was covered by ice sheet, and so the sedimentation process was mainly dominated by glacial scraping corrosion. The second deposition layer was formed under the ice shelf in low marine hydrodynamic environment and the third deposition layer was formed in front of the ice shelf in high marine hydrodynamic environment. The top deposition layer was formed in seasonal sea ice environment and was affected by iceberg. The study of marine sedimentary processes of the Ross Sea is very siginificant to complately understanding the evolution of marine environment in the Antarctica.
- Rose Sea,
- grain size,
- factor analysis,
- sedimentary environment

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