The 4700 aB.P. volcanic signal detected in Vostok BH8 ice core, Antarctica  

作　　者：LIU Leibao KANG Jiancheng Jean R. Petit Jefferson C. Simoes Martine De Angelis 

机构地区：[1]Polar Research Institute of China, Shanghai 200136, China [2]Institute of Environment and Biogeochemistry, Zhejiang University, Hangzhou 310027, China [3]Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, BP 96, Saint Martin d'Heres, France [4]Laboratório de Pesquisas Antárticas e Glaciológicas, Instituto de Geociencias, UFRGS, Av. Bento Goncalves 9500,91501-970 - Porto Alegre, RS - Brazil [5]Department of Geography, Shanghai Normal University, Shanghai 200234, China

出　　处：《Chinese Science Bulletin》2005年第22期2636-2639,共4页

基　　金：This work was supported by the China Scholarship Council (CSC);the National Natural Science Foundation of China (Grant Nos.40203013 and 4027 1026) ; the Brazilian National Council for Scien-tifice ind Technological Developnient (CNPq).

摘　　要：The detailed electrical conductivity measure- ment (ECM), trace chemical compositions and microparti- cles concentration analysis are performed for BH8 ice core from the depth of 126.0m to 130.0m at Vostok Station. At depth 128.7m, a volcanic signal 4726 a B.P. is detected. The volcanic sulphate flux is 95.8 kg·km?2, sulphate peak concen- tration 1352.8 ng·g?1, duration time about 10.1 years, com- parable with some well-known volcanic events. The results indicate that it seems to be a relatively large scale, long last- ing volcanic signal with farther volcanic origin.The detailed electrical conductivity measuremerit （ECM）, trace chemical compositions and microparticles concentration analysis are performed for BH8 ice core from the depth of 126.0m to 130.0m at Vostok Station. At depth 128.7m, a volcanic signal 4726 a B.P. is detected. The volcanic sulphate flux is 95.8 kg·km^-2, sulphate peak concentration 1352.8 ng·g^-1, duration time about 10.1 years, comparable with some well-known volcanic events. The results indicate that it seems to be a relatively large scale, long lasting volcanic signal with farther volcanic origin.

关 键 词：南极洲 火山岩 电传导率 微粒子 浓度分析 

分 类 号：P58[天文地球—岩石学]