三个不同海域沉积物碘研究

Iodine Study of Marine Sediment from Three Sea Areas

测定了从胶州湾、东海、东太平洋采集的沉积物岩心的碘含量，研究了4个沉积物岩心中碘的分布特征，探讨了岩心中碘与有机物含量的相关关系。结果给出：胶州湾沉积物碘含量为51．6．94．3mg／kg，胶州湾周边陆地沉积物的碘含量为36·5-50·3mg/kg，东海岩心碘含量为35．2—77．8mg／kg，东太平洋岩心碘含量为68．2．105．6mg／kg。不同海区沉积物的碘含量水平从高到低依次为：东太平洋〉胶州湾〉东海〉胶州湾周边陆地沉积物。三个海区的沉积物仅东太平洋岩心的碘与有机碳含量呈正相关关系，其余海区沉积物中的碘与有机碳的含量相关性不明显。说明，海洋沉积物的碘与有机碳的关系比较复杂，海洋源的沉积物碘与有机碳含量呈正相关关系，而陆源沉．积物则不然。

The iodine in the sediments collected from Jiaozhou Bay, East China Sea and East Pacific were measured and the distribution features in sediment cores were studied. The correlation between iodine and organic carbon contents in the sediments was evaluated. The results gave that the iodine contents in the sediments from Jiaozhou Bay are in the range of 51.6-94.3mg/kg and 36.5-50.3 mg/kg in the land sediment surrounding Jiaozhou Bay, and they are between 35.2 to 77.8mg/kg in the core from East Chins Sea, but vary from 68.2 to 105.6mg/kg in the sediments from East Pacific. Sequentially, from higher level to low level of iodine content, that was： East pacific 〉 Jiaozhou Bay 〉 East China Sea 〉 land sediment surrounding Jiaozhou Bay. The correlation between iodine and organic carbon contents in the sediment from East Pacific is well close, in contrast with that, they are not found for other sediment from other two sea areas, which demonstrated that the relation between iodine and organic carbon contents may be variable. The correlation iodine and organic carbon content is well close in sediment of marine source but not for terrigenous sediment.