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首页> 中文期刊> 《中国石油大学学报（自然科学版）》 >中全新世以来东海内陆架泥质沉积物来源

中全新世以来东海内陆架泥质沉积物来源

         
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利用判别函数、Eu异常与稀上元素总量关系(δEuN-∑REEs)图解以及物源定量识别方法,对位于浙闽沿岸泥质带的EC2005孔常微量、稀上元素地球化学进行分析,利用14C测量加速器质谱仪(AMS14C)进行年龄测定,探讨东海内陆架EC2005孔泥质沉积物来源.结果表明:EC2005孔泥质沉积物主要来源于长江,其平均贡献量为93.7%,没有识别出黄河物质;历史时期黄河物质可以影响到29°N甚至于更为偏南的区域(南界为27°25'N),台湾海峡西北部则可以接受台湾物质的输入;浙闽沿岸泥质区物质来源具有一定的复杂性,值得进一步深入研究.%Core EC2005, located in the mud area off Zhejiang-Fujian coast in the inner shelf of East China Sea, was analyzed for its major and trace elements, rare earth elements (REE) and dating by 14C accelerator mass spectrometry (AMS14C).Using discriminant function, the relationship between Eu anomalies and the total REE amount, namely the δEuN-ΣREEs plot and a mathematical model on the quantitative provenance identification, the provenance of mud sediments in core EC2005 was discussed.The results show that the mud sediment of core EC2005 mainly derived from Yangtze River.The average contribution of Yangtze-derived sediments occupied about 93.7％.No substances of Yellow River were identified in the study area.However, Yellow River materials could achieve the area near 29°N, even the more southern regions (to 27°25’ N) in historical period.The northwest of the Taiwan Strait accepted the input of Taiwan materials.Therefore, the sediment provenance of the mud area off Zhejiang-Fujian coast is complicated, and it is worth to further study.

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