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| 大兴安岭北部晋宁期片麻杂岩的地球化学特征及地质意义 | |
| 引用本文： | 秦秀峰,郭原生,刘旭光,付善明,张广纯.大兴安岭北部晋宁期片麻杂岩的地球化学特征及地质意义[J].兰州大学学报(自然科学版),2005,41(4):6-10. |
| 作者姓名： | 秦秀峰 郭原生 刘旭光 付善明 张广纯 |
| 作者单位： | 1. 兰州大学,资源环境学院,甘肃,兰州,730000 2. 黑龙江省地质调查总院,黑龙江,哈尔滨,150036 3. 兰州大学,政治与行政学院,甘肃,兰州,730000 |
| 基金项目： | 中国地质调查局地质调查项目 |
| 摘 要： | 大兴安岭北部阿龙山地区发育一套元古代凤水山片麻杂岩(Pt2Fgn),岩石类型以花岗质片麻岩为主,原岩属于一套钙碱性的中酸性花岗岩系列,以高SiO2、高碱(Na2O K2O)、高REE,具强烈的负Eu异常.其K-Ar稀释法年龄为920.95±32.7 Ma,表明为晋宁期岩浆事件的产物.岩石学岩石地球化学特征表明具岩浆成因特点,形成于同碰撞构造环境. |
| 关 键 词： | 片麻杂岩 地球化学 大兴安岭北部 |
| 文章编号： | 0455-2059（2005）04-0006-05 |
| 收稿时间： | 03 29 2004 12:00AM |
| 修稿时间： | 2004-03-29 |
Geochemical characteristics of Jinningian intermediate-acid gneisses in North Daxing'anling Mountains and their significance |
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| QIN Xiu-feng,GUO Yuan-sheng,LIU Xu-guang,FU Shan-ming,ZHANG Guang-chun.Geochemical characteristics of Jinningian intermediate-acid gneisses in North Daxing''''anling Mountains and their significance[J].Journal of Lanzhou University(Natural Science),2005,41(4):6-10. | |
| Authors: | QIN Xiu-feng GUO Yuan-sheng LIU Xu-guang FU Shan-ming ZHANG Guang-chun |
| Abstract: | Meoproterozoic Jinningian intermediate-acid gneisses in Alongshan area of Daxinganling Mountains are mainly granitcal-gneisses, characterized by high content of SiO2, alkali(Na2O+K2O) and REE, and intense negative Eu anormaly. Petroloyical and geochemical characteristics suggest that Jinningian granites in Alongshan area were formed in the syo-collisional setting. The protolith belongs to a set of calcic-alkaline intermediate-acid granitoid. The reaserch is of importance to the study of regional structural evolution and ore hunting. |
| Keywords: | intermediate-acid gneisses geochemical characteristics North Daxinganling Mountains |
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