信阳地区龟山岩组变质岩的原岩恢复  

Protolith Restoration of GuiShan Group Metamorphic Rock in Xinyang

作　　者：牛磊[1] 邵世威 张跃[1] 郭贤培 樊中玲[1] 李玉辉[1] 闫贺龙[1] 

机构地区：[1]河南省地质矿产勘查开发局第一地质勘查院,河南郑州450001

出　　处：《资源导刊（地球科技版）》2015年第4期4-6,32,共4页

摘　　要：龟山岩组是以强变形中深变质岩为主体的（构造）杂岩单位或构造岩层单位，由多个不同时代构造岩块经过多期构造混杂作用堆垛叠置在一起形成。根据信阳地区龟山岩组的变质岩组合特征及区域地质背景，选取四类岩石化学图解，从基本的区分正负变质岩到对角闪质岩石及长英质岩石分别进行图解分析，通过渐进和综合的比较，认为龟山岩组一岩段原岩可能主要为泥砂质碎屑岩；二岩段可能主要为一套泥砂质碎屑岩夹双峰式火山岩。Guishan Group is a （tectonic） complex unit or tectonic strata unit, with a strong deformation of mesometamorphic rocks as the main body, consists of the tectonic block in several different age through multiperiods tectonic mixture effects stacked together. According to the assemblage characteristics and the regional geological background of Guishan Group metamorphic rocks in Xinyang, this paper selects four petrochemical diagrams, from the basic distinction between orthometamorphite and para-metamorphic rock, to the graphic analysis of amphibolitic metamorphic rocks and felsic rocks respectively, through the progressive and comprehensive comparison, and then discusses the Drotolith restoration of GuiShan group metamorDhic rocks.

关 键 词：龟山岩组 变质岩 岩石化学 原岩恢复 

分 类 号：P588.34[天文地球—岩石学]