中国若干海域溶解态铀同位素的研究  

Study of dissolved uranium isotopes in some sea areas of China

作　　者：陈敏[1] 黄奕普[1] 陈飞舟[1] 邱雨生[1] 陈性保[1] 

机构地区：[1]厦门大学海洋系,厦门361005

出　　处：《台湾海峡》1997年第3期285-292,共8页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金!49376272

摘　　要：本文测定了南沙海域、南海东北部海域、厦门湾塔角附近海域与九龙江口水体中溶解态238U含量及其同位素组成。南沙、南海东北部海域溶解态238U比度及234U／238U）A.R.呈均匀分布状态，进一步证实开阔大洋水中铀同位素分布的均匀性。厦门湾塔角附近海域238U含量较南海水来得高，且其变化与盐度的变化不相协调，表明该海域也许存在238U的附加来源。四个研究海区溶解态U／S值的大小顺序为：厦门湾塔角附近海域＞九龙江口＞南沙海域≈南海东北部海域。The dissolved 238U concentration and 234U/238U activity ratios in the Nansha waters, the northeastern South China Sea,Xiamen Bay and Jiulongjiang Estuary have been extensivelystudied. The distribution of uranium concentrations and 234U/238U activity ratios in the Nan-sha waters and the N-E South China Sea reflects the uniform characteristic of uranium in theopen ocean. The concentration of 238U in Xiamen Bay is higher than those in the South ChinaSea,in addition,their variation does not coordinate with salinity. Both phenomena probablysuggest that there is an additional source of uranium in Xiamen Bay. The order of U/S ratiosfrom different sea areas is given as follows:Xiamen Bay>Jiulongjiang Estuary>the Nanshasea area≈the northeastern South China Sea.

关 键 词：溶解态 海水 铀同位素 海域 

分 类 号：P734.21[天文地球—海洋化学]