CAJ | 학술논문

为研究东海陆架微量元素地球化学信息对于地层划分与物源分析的指示意义，对东海陆架西湖凹陷区 SFK-1孔沉积物作了微量元素地球化学分析和物源判别。根据微量元素含量及比值的变化，可将 SFK-1孔（孔深82．90 m）岩心划分为8层，它们分别反映了末次间冰期（暖期）晚期以来东海海面波动以及沉积物物源的变化。运用因子分析、U /Th 与（Zr ＋Hf）/（Al2 O3＋TiO2）和 Th/Co 与 TiO2/Zr 的散点图等方法分析了 SFK-1孔沉积物的物质来源，结果显示该孔沉积物主要来源于长江，黄河物质对该孔中部沉积物有较明显影响。不同指标散点图研究表明，在沉积物物质来源不变的情况下，气候和沉积环境的变化对该区域沉积物化学元素组成进行的改造和再分配影响不大。
위연구동해륙가미량원소지구화학신식대우지층화분여물원분석적지시의의，대동해륙가서호요함구 SFK-1공침적물작료미량원소지구화학분석화물원판별。근거미량원소함량급비치적변화，가장 SFK-1공（공심82．90 m）암심화분위8층，타문분별반영료말차간빙기（난기）만기이래동해해면파동이급침적물물원적변화。운용인자분석、U /Th 여（Zr ＋Hf）/（Al2 O3＋TiO2）화 Th/Co 여 TiO2/Zr 적산점도등방법분석료 SFK-1공침적물적물질래원，결과현시해공침적물주요래원우장강，황하물질대해공중부침적물유교명현영향。불동지표산점도연구표명，재침적물물질래원불변적정황하，기후화침적배경적변화대해구역침적물화학원소조성진행적개조화재분배영향불대。
The geochemical information from trace elements of the continental shelf sediment from East China Sea is a significant indicator to the stratigraphic division and provenance analysis.The trace elements of sedi-ments derived from drillhole SFK-1(82.90 meters in depth)which was located at Xihu depression in the conti-nental shelf of East China Sea were analyzed and their provenances were discriminated.According to the chan-ging law of trace element contents and their ratios,the sediments from drillhole SFK-1 can be divided into eight layers,which reflect the fluctuation of sea level and the change of sediment sources in East China Sea since the late last interglacial cycle (warm period).Combined with factor analysis,the scatter diagrams of U /Th vs.(Zr+Hf)/(Al2 O3 +TiO2 )and Th /Co vs.TiO2 /Zr were drawn to determine the material source of sediments from drillhole SFK-1.The results revealed that the material sources of sediments mainly come from the Changjiang River,and sediments in the middle part of the drillhole were apparently influenced by materials from the Yellow River.The results also indicated that in the case of unchanging sediment sources,the changes of climate and sedimentary environment had little effect on transformation and redistribution of chemical elements of sediments in the study area.