| 深海沉积物中碲异常的成因 |
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| 关键词:deep=sea sediments extreme enrichment of tellurium helium isotope interplanetary dust particles(IDPs) |
| 基金项目:国家自然科学基金项目（编号：4987300和国土资源部科技项目（编号：20010209）联合资助 |
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| The Cause for Tellurium Enrichment in Deep-Sea Sediments |
| Tellurum is a sort of scattered rare elements in the earth. Its concentration seems very low in the earth's crust,being only 1.0ng/g. However, tellurium contents are extrmely high in Co-rich crusts, marine polymetallic nodules,deep-sea sediments and aerolites. To find out the causes for tellurium enrichments in deep-sea sediments,the authors analyzed and compared tellurium concentrations and helium isotope compositions in the magnetic parts and those in the bulk samples of deep-sea sediments. Helium contents,3He/4He ratios and tellurium concentrations are obviously higher in the magnetic parts than in the bulk samples.3He abundances synchronously vary with tellurium concentrations.3He-Te has distinct positive correlation with each other. This paper puts forward for the first time the opinion that the extreme enrichment of tellurium in deep-sea sediments,like helium isotope anomalies, probably results from the input of inerplanetary dust particles（IDPs）.Similarly the extreme enrichments of tellurium in marine polymetallic nodules and Co-rich crusts are possibly related to IDPs. |
| LI Aoxian,LI Yanhe,YUE Guoliang.2005.The Cause for Tellurium Enrichment in Deep-Sea Sediments[J].Acta Geoscientica Sinica,26(z1):186-189. |
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