四种不同海域沉积物碘研究

Abstract

分大洋、边缘海、海湾和潮间带四种海区,测定了采集自东太平洋、东海、山东胶州湾的海洋沉积物岩心和采集自福建兴化湾、九龙江河口、东山湾3个海湾潮间带沉积物岩芯的碘含量,研究了岩芯中碘的分布特征,探讨了碘与有机物的相关关系。结果给出:东太平洋岩芯碘含量为68.2~105.6 Mg/kg,东海岩芯碘含量为35.2~77.8 Mg/kg,胶州湾海洋和周边陆地沉积物碘含量分别为51.6~94.3和36.5~50.3 Mg/kg,福建兴化湾、九龙江河口和东山湾3个海湾潮间带沉积物岩芯的碘含量分别为2.5~43.7、17.3~39.6和11.3~29.1 Mg/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>福建3个海湾潮间带沉积物。东太平洋沉积物岩芯,以及兴化湾和东山湾潮间带岩芯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。

For four kinds of sea areas,the iodine in sediment cores were measured,the cores are marine sediment cores collected from East Pacific,East China Sea and Jiaozhou Bay,and intertidal sediment cores from Xinhua Bay,Jiulongjiang Estuary and Dongshan Bay of Fujian Province,China.The iodine distribution features in sediment cores were studied and the correlations between iodine and organic carbon in the sediments were evaluated.The results gave that the iodine contents vary from 68.2-105.6 mg/kg in the core from East Pacific and they are between 35.2-77.8 mg/kg in the core from East Chins Sea.The iodine contents are in the range of 51.6-94.3mg/kg and 36.5-50.3 mg/kg for the marine sediments of Jiaozhou Bay and sediment from the land surrounding Jiaozhou Bay respectively.They are 2.5-43.7 mg/kg,17.3-39.6 mg/kg,and 11.3-29.1 mg/kg for the intertidal sediment cores from Xinhua Bay,Jiulongjiang Estuary and Dongshan Bay respectively.Sequentially,from high to low level of iodine content is East Pacific > Jiaozhou Bay > East China Sea > marine sediment of Jiaozhou Bay >land sediment surrounding Jiaozhou Bay > intertidal sediments from three bays of Fujian Province.The correlations between iodine and organic carbon content in the sediment from East Pacific,Xinhua Bay and Dongshan Bay are well close,in contrast with that,they are not found for the sediments from other sea areas.