Extreme Enrichment of Tellurium in Deep-Sea Sediments  

作　　者：LI Yanhe WANG Yimin SONG Hebin YUE Guoliang 

机构地区：[1]Laboratory of Isotope Geology, Ministry of Land and Resources, Beijing 100037 [2]Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037 [3]National Geoanalysis Center, Beijing 100037

出　　处：《Acta Geologica Sinica(English Edition)》2005年第4期547-551,共5页地质学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.49873002);Key Basic Research Project of Ministry of Land and Mineral Resources(No.20010209).

摘　　要：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.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.

关 键 词：deep-sea sediments extreme enrichment of tellurium helium isotope interplanetary dust particles 

分 类 号：P736.3[天文地球—海洋地质]