摘要
本文主要讨论中基性火山岩与构造环境的关系.岩浆作用与构造作用有内在的联系.事实证明,岩浆岩的特点可以判定构造环境的性质.中基性火山岩广泛分布于不同的构造单元.基于191个采自不同构造环境的中基性火山岩的全岩化学成分,利用 AI_2O_3—Tio_2×10—K_2O×10(氧化物质量百分数)作成ATK三角图解,可以发现大洋的、大陆的、岛弧或造山带的中基性火山岩的成分点分别集中成三个区.又将不同构造环境其它典型的中基性火山岩在ATK图上投点验证,对上述三种构造环境有比较好的区别效果.
This paper focuses on the relation between basic-intermediate volcanic rocks and environment. Magmatism is related closely to tectonism.This is substantiated by the fact that the characteristics of different tectonic environment may be identified by the features of igneous rocks. The basic-intermediate volcanic rocks distribute in different tectonic units extensively. Based on 191 bulk rock compositions of basic-intermediate volcanic rocks and selecting three efficient elements, the triangular plot of A12O3-TiO2 × 10-K2O×10(wB, %, i. e. ATK diagram)are presented in this paper. The ATK diagram appeared to show that the plotted points concentrate at three areas : oceanic, continental and island arc or orogenic belt. Other typical chemical compositions of basic-intermediate volcanic rocks in different tectonic environment are verified by using this diagram. The result is good enough to distinguish the tectonic environments.
出处
《地质科技情报》
CAS
CSCD
北大核心
1989年第4期1-5,共5页
Geological Science and Technology Information
