| 南辽河群斜长角闪岩的地球化学特征及地质意义:以三家子地区为例 |
| |
| 引用本文： | 李富强,董永胜,王鹏森,高铂森,甘宜成.南辽河群斜长角闪岩的地球化学特征及地质意义:以三家子地区为例[J].世界地质,2017,36(1):82-92. |
| |
| 作者姓名： | 李富强 董永胜 王鹏森 高铂森 甘宜成 |
| |
| 作者单位： | 吉林大学 地球科学学院, 长春 130061 |
| |
| 摘 要： | 基于详细的野外地质调查,对南辽河群下部里尔峪组斜长角闪岩进行了岩相学和地球化学研究。岩相学研究表明,南辽河群下部里尔峪组斜长角闪岩属于正变质岩。地球化学研究显示,这些斜长角闪岩原岩属于高铁拉斑玄武岩系列(Nb/Y=0.16~0.4),SiO_2含量为47.27%~50.68%,具有较低的TiO_2含量(0.92%~1.61%),亏损高场强元素(Nb、Ta、Zr、Hf等),表明其原岩形成于岛弧或活动大陆边缘,而非前人所说的大陆裂谷。综合岩相学和地球化学特征,初步认为其岩石成因与活动大陆边缘有关。
|
| 关 键 词： | 南辽河群 斜长角闪岩 地球化学 高铁拉斑玄武岩 岛弧环境 活动大陆边缘 |
| 收稿时间： | 2016-11-21 |
| 修稿时间： | 2016-12-23 |
Geochemical characteristics of amphibolite of South Liaohe Group and their geological significance: a case study of Sanjiazi area |
| |
| LI Fu-qiang,DONG Yong-sheng,WANG Peng-sen,GAO Bo-sen,GAN Yi-cheng.Geochemical characteristics of amphibolite of South Liaohe Group and their geological significance: a case study of Sanjiazi area[J].World Geology,2017,36(1):82-92. |
| |
| Authors: | LI Fu-qiang DONG Yong-sheng WANG Peng-sen GAO Bo-sen GAN Yi-cheng |
| |
| Institution: | College of Earth Sciences, Jilin University, Changchun 130061, China |
| |
| Abstract: | On the basis of detailed field geological survey, the authors undertook petrographic and geochemical analysis of the amphibolites in Lieryu Formation of lower South Liaohe Group. Petrographic studies show that the amphibolites in Lieryu Formation are orthometamorphite. Geochemical data indicates that the amphibolites belong to high Fe tholeiitic series (Nb/Y=0.16~0.40), with the content of SiO2 of 47.27%~50.68%, and low TiO2 content of 0.92%~1.61%. They are depleted in high field strength elements such as Nb, Ta, Zr and Hf, indicating that their original rocks were formed in an island arc or active continental margin, rather than the continental rift defined by previous studies. Integrating petrographic and geochemical characteristics, it is preliminarily concluded that the petrogenesis is related to the active continental margin. |
| |
| Keywords: | South Liaohe Group amphibolite geochemistry high Fe tholeiite island arc setting active continental margin |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《世界地质》浏览原始摘要信息 |
| 点击此处可从《世界地质》下载免费的PDF全文 |
|
