地质科学
     首页 | 过刊浏览 |  本刊介绍 |  编委会 |  投稿指南 |  期刊征订 |  留言板 |  批评建议 |  联系我们 |  English
地质科学  2014, Vol. 49 Issue (2): 529-541    DOI: 10.3969/j.issn.0563-5020.2014.02.013
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
庐山变质核杂岩基底拆离的变形特征及形成条件
任升莲, 张妍, 杨帆, 胡达, 黄鹏, 王微, 张俊杰
合肥工业大学资源与环境工程学院 合肥 230009
The deformation characteristics and forming condition of detachment of the Lushan metamorphic core complex
Ren Shenglian, Zhang Yan, Yang Fan, Hu Da, Huang Peng, Wang Wei, Zhang Junjie
School of Resources and Environment Engineering, Hefei University of Technology, Hefei 230009
 全文: PDF (5931 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 庐山变质核杂岩具有典型的3层结构。拆离带是核部隆升过程中盖层滑脱、剪切变形而形成的,该拆离面是在北东向褶皱基础上叠加杂岩核部隆升作用而形成的波状起伏面。拆离带在核部以西发育倾向西向、南西向、北西向的面理和矿物生长线理,显示向西滑脱形成剪切拉伸变形的特征。拆离带岩石以糜棱岩和构造片岩为主,辅以碎裂岩和构造角砾岩。岩石变形特征表明其既具有韧性变形,也具有脆—韧性变形及脆性变形的特点。核部隆升引起的拆离变形作用,不仅形成了拆离带,还影响了拆离带以上盖层岩石,形成一个由拆离带向上由强变弱的变形域。这种规律性递变现象使庐山变质核杂岩具有垂向变形分层、水平变形分带的特点。拆离带中角闪石—斜长石矿物对计算得出的变质温度为653 ℃~694 ℃,压力为0.56~0.67 GPa。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
关键词庐山变质核杂岩   拆离带   拆离变形作用   角闪石—斜长石地质温压计     
Abstract: The Lushan metamorphic core complex has a typical three-layer structure. The detachment belt is formed because of slip of the cover and shear deformation during the uplift of core. The detachment surface is undulating because of the uplift of the core complex which is superimposed on NE-trending folds. In the west of the core,foliation and mineral lineation are developed with dip direction of W,SW and NW,which indicated the cover slipped to the west and then formed the shear tensile deformation. Rocks in the detachment belt are mainly of mylonite and tectonic schist,supplemented with cataclastic rock and structural breccia. The deformation characteristics indicate that the core complex rocks are in middle-deep tectonic environment with plastic deformation at the early stage of uplift. With the continuing of uplift,the deformation domain gradually became brittle-plastic and finally brittle in the shallow environment. The detachment deformation not only formed detachment belt,but also affected the overlying strata and formed a upward deformation domain from stronger to weak. This regular change indicates that the deformation of the Lushan metamorphic core complex has vertical stratification. The temperature and pressure calculated by amphibole-plagioclase geothermobarometer are 653 ℃~694 ℃, 0.56~0.67 GPa respectively.
Key wordsLushan metamorphic core complex   Detachment belt   Detach deformation   Microscopic deformation   Amphibole-plagioclase geothermobarometry   
收稿日期: 2013-11-18;
基金资助:

国家自然科学基金项目(编号:41272213,41272222,41072161);中国地质调查局科研项目(编号:1212011121114,201201044002)和合肥工业大学“庐山地理与地质创新实践基地”创新项目资助

作者简介: 任升莲,女,1963年2月生,博士,副教授,矿物学、岩石学和矿床学专业。E-mail:ren_lotus@126.com
引用本文:   
. 2014, 庐山变质核杂岩基底拆离的变形特征及形成条件. 地质科学, 49(2): 529-541.
. The deformation characteristics and forming condition of detachment of the Lushan metamorphic core complex[J]. Chinese Journal of Geology, 2014, 49(2): 529-541.
 
没有本文参考文献
[1] 杨帆, 宋传中, 任升莲, 李加好, 黄鹏, 王微. 庐山变质核杂岩东侧的伸展拆离及构造意义[J]. 地质科学, 2015, 50(3): 785-799.
 
版权所有 © 2009-2017 《地质科学》编辑部
地址:北京9825信箱  邮政编码:100029
电话:010-82998109  010-82998115