安徽省岩浆岩的平均化学成份

在进行1:20万区域地质调查和岩浆岩总结的基础上,笔者初步计算了安徽省岩浆岩的主要平均化学成分。由此,对于研究我省各类岩浆岩的物质成分、岩石化学特征和进行区域性岩浆岩的对比具有十分重要的意义。同时,亦是计算地壳内主要化学元素的丰度和揭示岩浆岩演化规律的重要数据。在搜集、整理和计算岩石化学数据的过程中,得到了许多兄弟单位和个人的大力协助,并提供了大量的岩石化学分析数据,尤其是我队姚仲伯付总工程师和孙克纯、陈孝

THE AVERAGE CHEMICAL COMPOSITION OF IGNEOUS ROCKS IN AN HUI

From 1:200000 regional geological reports over the years,we have colle- cted about 1216 analytical values of sillicats. According to the relatire regula- tion and demand,we calculated ’the average chemical composition of igneous rcoke in An Hui’ in accorndance with 497 values selected from 1216 analytical values. By using the Added Average Method of sample Number,we have found out the avgrage chemical composition of 51 sorts of rocks,5 basic types of igneous rocks,intrusive rocks,subvolcanic rock as wellas volcanic rock. On the basis of this work,we have,finally,obtained ’the Average Chemical composi- tion of igneous rocks in An Hui’. According to various sorths of relative ave- rage of oxides and indexes of rock chemistry. Then we expounded several rock chemical characteristics of igneous rocks in An Hui. Eventually,according to the average values of the basic types of igneous rocks and the relative for mulas. We obtained ’the average contents of the main elements of the basic sorts of igneous rocks in An Hui.