摘要
推导了任意个源区混合时同位素和微量元素所必须满足的普适方程;以二元混合作用为例详细讨论了在不同的条件下(比值-比值、比值-元素、比值-1/元素、元素-元素)该方程的展开和简化形式。从三元混合方程的展开形式可以看出,“地慢面”的概念是不能成立的,同时大洋玄武岩Nd,Sr和Pb同位素组成数据也并不支持大洋玄武岩为三元混合作用所形成这一假设。
The general equation of isotopes and trace elements concerning mixing process of arbitrary-components is deduced. The mixing equation of two-components is set as an exampleto discuss how to change it into other forms in order to fit for different conditions (ratio-ratio, ratio-element, ratio-1/element, element-element). From the three-components mixing equation obtained, it can be seen that the concept of 'mantle plane' is incorrect, meanwhile,the data of Nd, Sr and Ph isotopes of oceanic basalts show no evidence that the oceanic basalts are formed by the mixing process of three-components.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1997年第2期145-153,共9页
Geotectonica et Metallogenia
基金
国家自然科学基金!49304049
关键词
混合方程
玄武岩
同位素
微量元素
地幔
mixing equation, oceanic basalt, isotope, trace element