摘要
大兴安岭中南段中生代自晚三叠世至早白垩世火山活动不断,晚侏罗世达到高潮,形成了几套代表各自特点的火山岩组合,划分出晚三叠世、早—中侏罗世、晚侏罗世和早白垩世等4 个火山喷发(沉积) 旋回。火山活动相伴随的侵入活动受伸展机制制约,构成了成对的火山侵入岩带。
Volcanism lasted from the late Triassic to early Cretaceous in the mid southern Daxinganling and reached its peak at the late Cretaceous.This gave rise to several series of volcanic associations that are representative of four volcanic eruption sedimentation cycles:the early Triassic,early mid Jurassic,late Jurassic and early Cretaceous.The volcanism and associated intrusion were controlled by extensional mechanism,resulting in the present paired volcanic intrusive belts.
出处
《中国区域地质》
CSCD
1999年第4期351-358,372,共9页
Regional Geology of China
关键词
大兴安岭
火山岩
伸展机制
岩石演化
mid southern Daxinganling Mountain
volcanic rock
cycle
extensional mechanism