两种岩石地球化学图解在确定岩石同化,混染成因方面的应用

首先介绍了两种简易岩石地球化学图解，即元素，元素对比值混合方程和混染岩，混染端员元素浓度差相关性图解。进而应用这两种图解配合其它地质事实共同验证了冀东迁西上营－十八盘地区的云英闪长质片麻岩是由奥长花岩是由奥长花岗岩浆对角闪质岩石不同程度同化，混染形成的。

Application of Lithogeochemical Diagrams to Verify Tonalitic Gneiss of Assimilation and Contamination

This article first makes a brief introduction about two lithogeochemical diagrams. One is mixed equation diagram of pairs of elements and element ratios, and theother is element concentration difference diagram of contaminated rock and contaminatedminal.The two lithogeochemical diagrams together with some other geological facts jointlytest and verify the fact that the tonalitic gneiss in Shangying - Shibapan area, easternHebei province was formed by assimilation and contamination, the two contaminated minals are old plutonic intrusive type trondhjemitic magmas and amphibolite.