摘要
通过显微镜下观察到的结晶岩造岩矿物组合,利用已有同类岩石中这些矿物的化学组成及岩石的化学全分析的结果,根据质量平衡原理,进行线性约束条件下的非线性最优化拟合,求得这些矿物实际含量的定量计算方法。并将其应用于新疆东天山花岗岩类的造岩矿物含量计算,效果良好。
The author proposes a quantitative method for calculating modes of rock-forming minerals in crystalline rocks according to mineral assemblages observed under microscope in thin sections, analysed chemical compositions of these minerals from the same rocks or similar rocks to those detrmined directly on microprobe, and bulk compositions of the rocks, using nonlinear programming by over-simplifying gradient under linear constraints in this paper. The method has been used to study the granitoids in eastern Tianshan Mountains, Xinjiang, and the result shows that it is excellently efficient and valuable for extensive application.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第1期86-93,共8页
Acta Petrologica Sinica
基金
七.五国家305项目Ⅴ_(14)课题
关键词
结晶岩
造岩矿物
含量
定量计算
Nonlinear programming
Modes
Rock-forming minerals
Over-simplifying gradient
