溶解的硼的同位素组成在有 B 的元素的集中的联合,在淡水海水的 Cl 和咸度混合了从 Changjiang 河的河口拿的样品,在中国的最大的,在这研究详细被调查。从 Changjiang 河的河口的微咸水和海水样品在 1998 年 11 月在淡季期间被收集。硼同位素组成被 theCs_2BO_2~+ 石墨技术与 0.2per 的分析不确定性决定千为 NIST SRM 951 和 0.8per 的平均分析不确定性千为样品。硼的同位素组成,从开的海洋的东方海在南京和海水在 Changjiang 河里在δ~( 11 )表示了 B ,和硼集中,中国,被 B -5.4perthousand 和 40.0per 珍视的δ~( 11 )描绘千,象 0.0272 和 4.43 mg 装运提丹一样,分别地。在 B 珍视的δ ~(11 ) 之间的 Well-definedcorrelations, B 集中和 Cl 集中以由直接冲淡的进程的在河输入水和东方海海水之间的二进制混合被解释。B 珍视的δ ~(11 ) 的偏移量不与碎屑状的沉积并且到硼的增加的内容有关。这些关系在 Changjiang 河的河口赞成硼的保守行为。
The isotopic composition of dissolved boron, in combination with the elemental concentrations of B, Cl and salinities in freshwater-seawater mixed samples taken from the estuary of the Changjiang River, the largest one in China, was investigated in detail in this study. Brackish water and seawater samples from the estuary of the Changjiang River were collected during low water season in November, 1998. Boron isotopic compositions were determined by the Cs2BO^+2-graphite technique with a analytical uncertainty of 0.2‰ for NIST SRM 951 and an average analytical uncertainty of 0.8‰ for the samples. The isotopic compositions of boron, expressed in δ^11B, and boron concentrations in the Changjiang River at Nanjing and seawater from the open marine East Sea, China, are characterized by δ^11B values of -5.4‰ and 40.0‰, as well as 0.0272 and 4.43 mg B/L, respectively. Well-defined correlations between δ^11B values, B concentrations and Cl concentrations are interpreted in terms of binary mixing between fiver input water and East Sea seawater by a process of straightforward dilution. The offsets of δ^11B values are not related to the contents of clastic sediment and to the addition of boron. These relationships favor a conservative behavior of boron at the estuarine of the Changjiang River.