| 粤北澜河变质岩的地球化学特征及其地质意义 |
| |
| 引用本文： | 吴烈勤,沈渭洲,黄国龙,凌洪飞,叶海敏.粤北澜河变质岩的地球化学特征及其地质意义[J].地质论评,2006,52(5):609-617. |
| |
| 作者姓名： | 吴烈勤 沈渭洲 黄国龙 凌洪飞 叶海敏 |
| |
| 作者单位： | 1. 核工业290研究所,韶关,512026
2. 南京大学成矿作用研究国家重点实验室,南京大学地球科学系,210093 |
| |
| 基金项目： | 本文为国家自然科学基金资助重点项目（批准号：40132010）和创新群体项目（批准号：40221301） .周新民教授和陈培荣教授仔细审阅全文,并提出宝贵的修改意见,笔者在此致以衷心的感谢! |
| |
| 摘 要： | 粤北澜河变质岩主要由黑云母变粒岩和白云母绿泥片岩组成。根据主要元素、微量元素与稀土元素组成以及在各种相关判别图解上的投影，黑云母变粒岩的原岩为砂质岩，白云母绿泥片岩的原岩为泥质岩，它们主要是在被动大陆边缘的沉积环境中形成。根据黑云母变粒岩中单颗粒碎屑锆石最小U—Pb年龄为725Ma以及加里东期或早于加里东期变质的事实，原岩的沉积时间为早古生代。澜河变质岩的Sm—Nd同位素组成表明，它们的物源区为古元古代地壳，形成过程中没有年轻地壳物质加入。
|
| 关 键 词： | 地球化学 Sm—Nd同位素 构造环境 澜河变质岩 粤北 |
| 收稿时间： | 2005-04-10 |
| 修稿时间： | 2005-04-102005-10-16 |
Geochemical Characteristics and Its Geological Implications of the Lanhe Metamorphic Rocks, Northern Guangdong |
| |
| WU Lieqin,SHEN Weizhou,HUANG Guolong,LING Hongfei,YE Haimin.Geochemical Characteristics and Its Geological Implications of the Lanhe Metamorphic Rocks, Northern Guangdong[J].Geological Review,2006,52(5):609-617. |
| |
| Authors: | WU Lieqin SHEN Weizhou HUANG Guolong LING Hongfei YE Haimin |
| |
| Institution: | 1. Research Institute No. 290, CNNC, Shaoguan, 512026;2. State Key Laboratory of Mineral Deposit Research and Department of Earth Sciences, Nanjing University, 210093 |
| |
| Abstract: | The Lanhe metamorphic rocks in northern Guangdong province include mainly biotite-granulitite and muscovite-chlorite-schist. Based on their main elements, trace elements and rare earth elements, the original rocks of the biotite-granulitite and muscovite-chlorite-schist were recovered to be sandstone and mudrock, respectively, which may have deposited in passive continent margin. The facts that the youngest U-Pb age (725Ma) of detritus zircons from the biotite-granulitite and that metamorphism occurred at the Caledonian or earlier than the Caledonian Period suggest that the original sedimentary rocks of metamorphic rocks may have deposited at Early paleozoic. The Sm-Nd isotope compositions of the Lanhe metamorphic rocks also indicate that the provenance for the sedimentary rocks was composed of Paleo-proterozoic crust where there was little mantle-derived juvenile crustal matter. |
| |
| Keywords: | Geochemistry Sm-Nd isotope tectonic environment metamorphic rocks at Lanhe northern Guangdong |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
|
