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我国首次(1984.12—1985.4)南大洋科学考察中,对南极半岛西部(南纬60°至66°55′,西经55°至69°30′),包括南设得兰群岛周围和阿得雷德岛西北海域进行了多学科的综合调查研究工作。为了取得有关海底沉积作用的地球化学信息,我们选用12个站位的海底沉积物样品以及对其中7个站位的沉积物分离出石英单矿物,分别做了氧同位素分析;同时,对10个站位的沉积物样品还做了稀土元素分析。根据这些样品的氧同位素组成和稀土元素分布特征,结合沉积物组分和周边地质资料,探讨了该区海底表层沉积物的形成条件和物质来源等问题。
For the first time in our country (1984.12-1985.4), the Southern Ocean Scientific Expedition conducted a survey on the western Antarctic Peninsula (latitude 60 ° to 66 ° 55 ’, longitude 55 ° to 69 ° 30’ long), including the areas around South Shetland Islands and Adelaide Northwestern island of Tokushima conducted a comprehensive multidisciplinary investigation. In order to obtain geochemical information on seafloor sedimentation, we selected 12 seabed sediment samples and isolated quartz single mineral from sediments at 7 stations, and analyzed the oxygen isotopes respectively. At the same time, The sediment samples at the station also did a REE analysis. Based on the oxygen isotopic composition and REE distribution characteristics of these samples, the sedimentary components and the surrounding geological data are combined to discuss the formation conditions and material sources of the surface sediments in this area.