从西南天山超高压变质带多期构造变形看天山古生代构造演化

被引：11

作者：

林伟 ^{[1
]}

黎乐 ^{[1
]}

张仲培 ^{[2
]}

石永红 ^{[3
]}

李秋立 ^{[1
]}

薛振华 ^{[1
]}

王非 ^{[1
]}

吴林 ^{[1
]}

机构：

[1] 岩石圈演化国家重点实验室,中国科学院地质与地球物理研究所

[2] 石油勘探开发研究院,中国石油化工集团公司

[3] 合肥工业大学资源和环境学院

来源：

岩石学报 | 2015年 / 31卷 / 08期

关键词：

西南天山; 高压-超高压变质带; 构造分析; 多期构造变形; 构造演化;

D O I：

暂无

中图分类号：

P548 [区域构造地质学];

学科分类号：

070904 [构造地质学];

摘要：

通过对西南天山阿克雅孜和木扎尔特地区高压-超高压变质带构造几何学和岩石变形相关运动学的详细剖析,厘定出高压-超高压变质岩石及其相关围岩的构造单元。详细研究表明,研究区可划分为三个构造单元:北部单元、中部单元和南部单元。确定了每个构造单元的构造几何学特征及各个构造单元之间的相互关系。通过分析岩石变形特征和叠加关系,确定了岩石所记录多期变形的运动学特征。根据研究区的多期构造变形特点,建立了阿克雅孜和木扎尔特河地区构造演化序列。共划分出四期构造可识别的事件(E1-E4),分别代表了E1:高压-超高压岩石折返过程;E2:高压-超高压岩石造山带的早期改造过程;E3:北部构造事件对高压-超高压造山带影响;E4:走滑构造对高压-超高压造山带的叠加。沿造山带系列构造分析表明,西南天山高压-超高压带中发育的四期构造事件沿中天山北缘具有很好的一致性,各期构造事件也有一定的横向可对比性。在此基础上通过对多期变形事件的构造背景的探讨,建立了整个天山在古生代的构造拼合过程,揭示我国西部洋壳相关的深俯冲造山带形成过程和参与深俯冲作用(超)高压变质岩的变形变质历史。

引用

页码：2115 / 2128

页数：14

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