西南极乔治王岛长城站区晚第四纪燕窝湖岩芯元素地球化学特征

本文阐述了乔治王岛长城站区燕窝湖沉积物中微量元素及某些常量元素的含量、分布、富集系数和相关系数的变化规律 ,探讨了该湖岩芯物质来源及气候环境的阶段性变迁 ,认为一方面燕窝湖周围碎屑沉积岩 (包括火山沉积岩 )是进入沉积体系的主要物源 ;另一方面 ,地幔物质也是其物源之一 ;同时 ,并不排除南极大陆冰进期搬运来的陆源物质进入沉积体系。

THE ELEMENTAL GEOCHEMICAL CHARACTERISTICS OF LATE QUATERNARY OF YANWO LAKE CORE FROM THE GREAT WALL STATION,KING GEORGE ISLAND,ANTARCTICA

The Yanwo Lake,situated in King George Island at 62°13′14″S and 58°57′38″W .It is important to study the elemental and environmntal geochemistry of this region. Reported in this paper are the contents, distribution,statical values,relative rich coefficients,interrelated matrix of elements in the late Quaternart sediments of Yanwo Lake Core from the Great Wall Station, King George Island. The results show that the sediments in Yanwo Lake Core:the lam (clayey soil) is highly rich in Cs,As Ba,and poor in Cr, Hf; the sand is highly rich in Ni, Zn,Au,Sr and poor in Ta, Zn, E; the gravel is highly rich in Rb and poor Fe, Cs, Yh, As, Ba. The relative rich coefficients of the elements in Yanwo Lake core with earth crust, sedimentary rock and loess are show that the K, Rb, Cs, Ya, Hf, U, Th, Zn, Sr, Ba have great movable ability; Na, Fe, Co, Zr, Sc, As have medial movable ability; Ni, Mo, Au, have weak movable ability. The interrelated matrix of elements in sediments of Yanwo Lake Core is show that between Na and Zn; Mo and Cr, As;Co and Sc, Mo, AS; Sc and Cs, Mo, AS; Fe and Co, SC, Mo, AS are extremely clear relations, and between Na and As; Rb andFe, Co, Sc, Mo are negatively clear relative.