摘要
作者选择了夏威夷瓦胡岛碱性玄武岩系（具地幔平衡部分熔融成因，简称Ｐ型）和智利安底斯山脉南段的拉斑玄武岩系（具岩浆分离结晶成因，简称Ｆ型），对元素进行全面考虑，即按元素的地球化学类型以一定的方式组合，重新研究二岩系数据，发现了Ｐ型和Ｆ型岩系微量元素丰度关系具有明显的差异特征，由此总结出Ｐ型和Ｆ型微量元素丰度关系曲线斜率规律；反过来，利用由斜率规律建立的“斜率判别岩系成因法”，判别岩系是Ｐ型还是Ｆ型成因。
The authors selected the alkaline basalt series of Oahu, Hawaii with petrogenesis of partial melting process of mantle (Type P) and the tholeiitic basalt series of soutthern Andes, Chile with petrogenesis of fractional crystallization of magma (Type F), studied the data of elements according to their geochemical types, and found that the element abundance relationships of Type P and F have different characteristics. The authors concluded that the slopes of elemental abundance relationship of Type P and F in a lg-lg plot are different; conversely, a slope method which could diagnose petrogenesis of an igneous rock series was established. The slope method is accurate,objective, unambiguous, simple and convenient.
出处
《成都理工学院学报》
CAS
CSCD
1996年第2期43-48,共6页
Journal of Chengdu University of Technology
关键词
岩浆岩
微量元素
元素丰度
成因
igneous rock
trace element
Type P
Type F
slope diagnosis
