| 南极南设得兰群岛海域地质新进展:“海洋六号”南极科考初步成果 |
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| 关键词:South Shetland Islands Bransfield Strait geological and geophysical survey R/V “Hai Yang Liu Hao” |
| 基金项目:中国地质调查局海洋地质调查计划项目(编号: GZH201100303) |
| 作者 | 单位 | E-mail | | 何高文 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | hegaowen@163.com | | 付少英 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 邓希光 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 赵庆献 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 王力峰 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 王海峰 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 关晓春 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 刘胜旋 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 庞云天 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 陈玺 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 柴祎 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 罗贤虎 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 朱本铎 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 朱振华 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 李强 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 苏丕波 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 何赵 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 吴聪 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 黄宁 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 何发光 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | | | 蓝明华 | 自然资源部海底矿产资源重点实验室, 广州海洋地质调查局 | |
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| New Geological Progress in Offshore Area of South Shetland Islands, Antarctic: Preliminary Results of R/V “Hai Yang Liu Hao” Expedition |
| The 33rd China Antarctic Research Expedition R/V “Hai Yang Liu Hao” Cruise, which was implemented in 2016–2017, was the first to obtain the full coverage and high precision multi-beam echo sounding water depth data of the seabed in the north of the South Shetland Islands, the Bransfield Strait and the Deception Island in the Antarctic Peninsula, covering an area of 17 850 km2. Accurate topographic maps with higher terrain resolution than currently published data were obtained. The results of multi-channel seismic show that there are many natural gas hydrate geophysical markers BSR in the survey area. The geothermal heat flow value indicates that the heat flow value in the north of the South Shetland Islands is consistent with the global ocean heat flow data. There is no obvious anomaly, and the heat flux value data in the south of the archipelago are relatively high. Sediment samples are typical submarine glacial sediments between the South Shetland Islands and the South Shetland Trench. The sediments are dominated by silt-sand, mixed with gravel, and the sediment size becomes finer with increasing water depth. The distribution of surface sediments in the Bransfield Strait area is asymmetrical. On the southern shelf-upper slope of the trough and in the northeast and adjacent shelf of the trough, the sediments are mainly gravel and sandy, whereas the trough and the lower slope are silty siliceous ooze. The field test results of the headspace gases sample of sediments show that there is no significant difference in the methane content of surface sediments at the depth of about 50 cm below the seabed, but there are local high anomalies in the methane content of the two stations in the deep water area of the island slope at around 270 cm below the seabed. There is a certain similarity in the trend of total methane content, which may be caused by the decomposition and migration of hydrates. |
| HE Gao-wen,FU Shao-ying,DENG Xi-guang,ZHAO Qing-xian,WANG Li-feng,WANG Hai-feng,GUAN Xiao-chun,LIU Sheng-xuan,PANG Yun-tian,CHEN Xi,CHAI Yi,LUO Xian-hu,ZHU Ben-duo,ZHU Zhen-hua,LI Qiang,SU Pi-bo,HE Zhao,WU Cong,HUANG Ning,HE Fa-guang,LAN Ming-hua.2018.New Geological Progress in Offshore Area of South Shetland Islands, Antarctic: Preliminary Results of R/V “Hai Yang Liu Hao” Expedition[J].Acta Geoscientica Sinica,39(6):643-656. |
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