造山带花岗岩类型及填图方法的实践——以甘肃北山造山带为例  

Types of granite and mapping methods for the orogenic belt——Exemplified by Beishan Mountain orogenic belt, Gansu Province

作　　者：梁明宏[1] 龚全胜[2] 李海林[2] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]甘肃地质调查院第三地质调查所,甘肃兰州730050

出　　处：《岩石矿物学杂志》2002年第2期174-178,共5页Acta Petrologica et Mineralogica

摘　　要：甘肃北山造山带系天山—兴安巨型褶皱带的组成部分 ,地处塔里木—中朝板块与哈萨克斯坦板块的接壤地带。独特的大地构造环境使岩浆活动异常发育 ,广泛出露面积巨大的花岗岩体 ,不同造山阶段、不同构造环境均有不同类型、不同特征的花岗岩出露。笔者在甘肃北山造山带 1∶2 5万区调填图中 ,依据岩浆演化、序次关系、变形变质特征将测区的花岗岩划分为 4种类型 ,采用了不同的工作方法 。Beishan Mountain orogenic belt in Gansu Province is a part of the extensive Tianshan-Xinganling folded belt, located where Tarim-China-Korea plate is connected with the Kazakhstan plate. Magmatic activities are developed under special tectonic setting, and granite masses of different types and properties are widely formed in different orogenic stages and tectonic settings. The granites in Beishan Mountain of Gansu Province are divided into 4 types according to magmatic evolution, formation orders, and metamorphic-deformational properties detected during geological mapping in 1:250?000 regional geological investigation. With different approaches, different mapping systems have been established.

关 键 词：花岗岩类型 填图方法 异源演化 构造混杂 形变混杂 

分 类 号：P588.121[天文地球—岩石学] P285.1[天文地球—地质学]