兴蒙造山带东段火成岩构造组合、构造岩浆阶段及大地构造演化
Geology and Resources(2011)
Abstract
以火成岩构造组合的概念和方法为指导,以近几年在嘉荫、伊春、鹤岗、鸡西、牡丹江等地区开展的1∶5万、1∶25万区调研究为基础,基于侵入岩锆石U-Pb年龄,建立了研究区古生代构造岩浆阶段划分的初步方案.划分出与洋壳俯冲事件有关的火成岩构造组合5期,分别为加里东期早寒武世、早中奥陶世、中志留世,华力西期晚石炭世和晚二叠世.与大陆碰撞有关的火成岩构造组合有两期,分别为加里东期早寒武世和华力西期中二叠世.造山后A型花岗岩二期.据此划分出加里东构造岩浆阶段和中华力西—印支构造岩浆阶段.指出其与传统观点不同,为重新认识该区大地构造演化提供了新的思路.并在此基础上讨论了大地构造演化.
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Key words
Middle Variscan-Indosinian stage,tectonic assemblage of igneous rocks,Paleoasian Ocean,Xing'an-Mongolian orogenic belt,tectonomagmatic stage,Caledonian stage
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