摘要
应用岩石化学、地球化学理论和方法， 对北淮阳地区中生代岩浆活动的成因类型、构造环境、旋回、岩浆演化等作了分析阐述。区内岩浆岩可划分为两个旋回、两个系列四期岩浆活动， 其中Ⅰ１ 、Ⅰ２两期属形成碰撞造山带， 在燕山期陆内挤压环境的“Ⅰ”型岩浆岩， Ⅰ３ 期及Ⅱ旋回属相对稳定的拉张环境及陆内俯冲期由挤压向拉张环境转化形成的“Ａ２ ”型岩浆岩。
In this paper the genetic types,tectonic environment, cycles and evolution of the Mesozoic magmatic activity in the Beihuaiyang area have been analyzed by using petrochemical,geochemical theories, etc The igneous rocks may be divided into two cyles,two series and four stage activity,of which Ⅰ1 and Ⅰ2 stages belong to Ⅰ-type igneous rocks forming collisional orogen in the Yanshanian intracontinental compressional setting and Ⅰ3 stage and cycle Ⅱto A2-type igneous rocks formed in relatively stable setting and intracontinental subduction period from compression to extension
出处
《安徽地质》
1999年第3期178-184,220,共8页
Geology of Anhui
关键词
岩浆成因类型
构造环境
中生代
北淮阳
magmatic genetic types
tectonic environmen
Mesozoic
Beihuaiyang
