| 北大别罗田榴辉岩的减压出溶结构与超高压变质作用 |
| |
| 引用本文： | 刘贻灿,古晓锋,陈振宇.北大别罗田榴辉岩的减压出溶结构与超高压变质作用[J].地质科学,2009,44(1):202-212. |
| |
| 作者姓名： | 刘贻灿 古晓锋 陈振宇 |
| |
| 作者单位： | 1. 中国科学技术大学地球和搴间科学学院壳幔物质与环境重点实验室, 合肥, 230026;
2. 中国地质科学院矿产资源研究所, 北京, 100037 |
| |
| 基金项目： | 中国科学院知识创新工程重要方向性项目，国家自然科学基金 |
| |
| 摘 要： | 岩石学研究表明北大别罗田榴辉岩经过了榴辉岩相、麻粒岩相和角闪岩相变质作用，表现出多种减压出溶结构.特征性的减压出溶结构有单斜辉石和石榴石中分别发育石英+角闪石+斜长石等与金红石+单斜辉石+角闪石等针状矿物出溶体，以及锆石中含有柯石英残晶.这些进一步证明北大别南部（罗田一带）同北部（如黄尾河、百丈岩等地）榴辉岩一样经过了>5～7CPa的超高压变质作用.
|
| 关 键 词： | 榴辉岩 矿物出溶体 柯石英 超高压变质作用 北大别杂岩 |
| 收稿时间： | 2007-10-29 |
| 修稿时间： | 2007-10-29; |
Breakdown textures and ultrahigh-pressure metamorphism of the eclogites from the Luotian Dome in the North Dabie Complex |
| |
| Liu Yican,Gu Xiaofeng,Chen Zhenyu.Breakdown textures and ultrahigh-pressure metamorphism of the eclogites from the Luotian Dome in the North Dabie Complex[J].Chinese Journal of Geology,2009,44(1):202-212. |
| |
| Authors: | Liu Yican Gu Xiaofeng Chen Zhenyu |
| |
| Institution: | 1. Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026;
2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037 |
| |
| Abstract: | Metamorphic petrology of eclogites was carried out at Luotian in southwestern part of the North Dabie Complex(NDC),central China.The results suggested that the eclogues experteneed eclogue-, granulate-and amphibolite-fades metamorphism,and displayed multistage breakdown textures.The most striking features of breakdown textures were presence of exsolutian of different phases in pyroxene and garnet from the studied eclogues.In particular, we documented the exsolution of ruble+clinopyroxene+amphibole+apatite being discovered in the sodic garnet and quartz+amphibole+sodic plagioclase in the clinopyroxene respective1y,and rare coesite relics being discovered in the zircon.All these implied that the eclogites around Laotian area from southern part of the NDC should he similar to those from northern part of the NDC(e.g.Huangweihe and Baizhangyan)and suffered Triassic LtHP metamorphism with a possible pressure of>5~7 GPa. |
| |
| Keywords: | Eclogue Mineral exsalution Coesite Ultrahigh-pressure metamorphism The North Dabie Complex |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质科学》浏览原始摘要信息 |
| 点击此处可从《地质科学》下载免费的PDF全文 |
