Extreme Enrichment of Tellurium in Deep-Sea Sediments
Tellurium is a sort of scattered rare element on the earth.Its concentration is very low in earth's crust,only 1.0 ng/g.However,it has extremely high abundance in Co-rich crusts,marine polymetallic nodules,deep-sea sediments and aerolites.To find out the origin of tellurium enrichment in deep-sea sediments,we analyzed and compared tellurium concentrations and helium isotope compositions in the magnetic parts and those in the bulk parts of deep-sea sediments.The result indicates that the helium content,3He/4He ratio and tellurium concentration are obviously higher in the magnetic parts than those in the bulk parts.The 3He abundance varies synchronously with the tellurium concentration.3He and Te have a distinct positive correlation with each other.It is the first time that the paper brings forward that the extreme enrichment of tellurium in deep-sea sediments,like helium isotope anomalies,probably results from the input of interplanetary dust particles (IDPs).Similarly,the extreme enrichment of tellurium in marine polymetallic nodules and Co-rich crusts is possibly related to IDPs.
作 者： Li Yanhe WANG Yimin Song Hebin YUE Guoliang 作者单位： Li Yanhe,Song Hebin,YUE Guoliang(Laboratory of Isotope Geology,Ministry of Land and Resources,Beijing 100037;Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037)WANG Yimin(National Geoanalysis Center,Beijing 100037)
刊 名： 地质学报（英文版） SCI 英文刊名： ACTA GEOLOGICA SINICA 年，卷(期)： 2005 79(4) 分类号： P5 关键词： deep-sea sediments extreme enrichment of tellurium helium isotope interplanetary dust particles