苏鲁高压-超高压带的结构、变形特征及形成背景探讨  

Texture, Deformation and Formation Background of the Sulu High-Ultrahigh Pressure Metamorphic Belt

作　　者：张忠义[1] 吴淦国[1] 宋明春 张达[1] 

机构地区：[1]中国地质大学,北京100083 [2]山东省第四地质矿产勘查院,山东潍坊261021

出　　处：《地球学报》2004年第6期607-614,共8页Acta Geoscientica Sinica

基　　金：国土资源部科技项目 (编号 :2 0 0 3 40 1)资助

摘　　要：苏鲁高压 超高压变质带由不同层次、不同级别、不同变质岩石组合的构造岩片堆叠而成 ,自北向南可分别为 9个构造岩片。这种复杂的结构的形成和发展主要受早期的变质变形作用控制 ,并被晚期构造作用改造。本文重点对高压 超高压变质带的构造变形进行了分析 ,自元古宙—中生代韧性改造事件可分为 4期。最后在以上工作的基础上对其形成的地质背景进行了探讨 ,指出了两次高压 超高压变质事件存在的可能 ,而且其新元古代的构造事件可与全球Rodinian超大陆的形成与裂解相对比。The Su-Lu high-ultrahigh pressure metamorphic belt results from the superimposition of tectonic slices of various grades. It can be divided into nine tectonic slices in southward direction, namely Weihai-Yangkou, Muping-Rushan, Taolin-Shangzhuang,Wulian-Jiaonan, Banquan-Rizhao, Linshu-Haitou, Donghai-Tushan, Lianyungang-Punan and Guanyun-Yangji. The formation and evolution of the complex structure were controlled mainly by early deformation and metamorphism. A study of the deformation indicates that from Proterozonic to Mesozonic the high-ultrahigh pressure metamorphic belt experienced four shear deformation stages. The investigation into the geological setting for the evolution of the high-ultrahigh pressure metamorphic belt reveals that there might have existed two high-ultrahigh metamorphic events in the evolution of the orogenic belt. The tectonic event during Neoproterozonic must have had a close relationship with global Rodinia supercontinent aggregation and cracking-disintegration.

关 键 词：构造岩片 超高压变质带 元古宙 超大陆 变质变形作用 构造事件 变形特征 全球 复杂 层次 

分 类 号：P588[天文地球—岩石学] P542[天文地球—地质学]