三亚活体珊瑚的微量元素与硼同位素组成的初步研究  

Preliminary Study for Trace Element and Isotopic Compositions of Boron in Growing Corals from Sanya Bay,China

作　　者：李华玲[1] 肖应凯[1] 魏海珍[1] 杜秀月[1] 王秀芳[1] 陈玉锋[1] 

机构地区：[1]中国科学院青海盐湖研究所

出　　处：《盐湖研究》2006年第2期35-41,共7页Journal of Salt Lake Research

基　　金：国家自然科学基金项目(编号:40373006;405730013)

摘　　要：测定了三亚活体珊瑚和其生长海域海水的Ca、Mg、B、Sr含量和B同位素组成,结果表明珊瑚中这些元素的浓度与对应海水的相同元素呈现出弱的正或负相关性,所有的相关系数均不大于0.3,这表明珊瑚的这些化学成分主要不是由对应海水所决定。Ca,Sr和B在珊瑚中均得到富集,其中Sr的富集程度最高,达3.08×103,而Mg在珊瑚中却是贫化的。珊瑚中Sr的掺入对B的掺入的影响要高于主成分Ca本身的影响,δ11B值与珊瑚的主成分Ca的浓度几乎无关,而与B、Sr和Mg浓度分别具有较弱的正相关和负相关关系,相关系数分别为0.343,0.309和0.276,珊瑚Sr浓度的增加引起B浓度的增加,同时会引起δ11B值的增加,而Mg的影响与此相反。The isotopic compositions of boron （δ^11B values） and the elemental concentrations of B, Ca, Mg and Sr in growing corals with δ^11B values of the coexisting seawater from Sanya Bay have been measured in this study. The results indicate that the elemental concentrations of B, Ca, Mg and Sr in corals have weak positive or negative relationgship with that in aeawaters and all coefficients don＇ t exceed 0.3. Ca, Sr and B are enriched in corals. The distribution coefficient of Sr between coral and seawater is highest with 3.08 ×10^3, Mg in corals get deficient. The effect of Sr in coral on the B is higher than that of the main component Ca. δ^11B is independent of the content of Ca and a weak positive and negative relationship between δ^11B values and the content of B, Sr and Mg in corals can be observed.

关 键 词：珊瑚 海水 化学成分 微量元素 硼同位素组成 

分 类 号：P734.4[天文地球—海洋化学]