| 内蒙古野芨里镁铁质——超镁铁质岩体的岩石地球化学特征 |
| |
| 引用本文： | 闫海卿,汤中立,焦建刚,耿科,潘振兴.内蒙古野芨里镁铁质——超镁铁质岩体的岩石地球化学特征[J].现代地质,2005,19(4):515-521. |
| |
| 作者姓名： | 闫海卿 汤中立 焦建刚 耿科 潘振兴 |
| |
| 作者单位： | 1长安大学 地球科学与国土资源学院，陕西 西安710054；2中国地质大学 地球科学与资源学院，北京100083 |
| |
| 基金项目： | 中国地质调查局综合研究项目“中国超大型镍铜铂岩浆硫化物矿床预测研究”（200110200058）. |
| |
| 摘 要： | 野芨里岩体分布于金川铜镍(铂)硫化物矿床北偏东约100 km处，位于内蒙古境内。岩体主要由单斜辉石橄榄岩、二辉橄榄岩、辉长岩和闪长岩组成。岩体的稀土元素配分模式显示轻稀土元素略为富集，曲线为近于平坦型，w(La)N/w(Yb)N=1.866～2.713，不具备会聚型板块边缘玄武岩的特点；εNd(t)＞0，为亏损地幔源区特征。Mg#值和Ni丰度显示其为岩浆早期阶段堆晶作用的产物。与金川矿区超镁铁质岩体比较，二者均为华北大陆边缘成矿系统的组成部分，m/f值显示二者主要为铁质超基性岩，稀土元素及微量元素显示其具相似的地球化学特征，但野芨里岩体具早期堆晶就地熔离的特征，而金川岩体具有深部熔离-多期贯入的特征；野芨里岩体中Ni相对亏损。这些特征表明野芨里岩体具成矿的可能性。
|
| 关 键 词： | 野芨里岩体 岩石地球化学特征 Cu-Ni硫化物矿床 金川 内蒙古 |
| 文章编号： | 1000-8527（2005）04-0515-07 |
| 收稿时间： | 2005-04-15 |
| 修稿时间： | 2005-09-15 |
Petrological and Geochemical Characteristics of Yejili Mafic-ultramafic Intrusion, Inner Mongolia |
| |
| YAN Hai-qing,TANG Zhong-li,JIAO Jian-gang,GENG Ke,PAN Zhen-xing.Petrological and Geochemical Characteristics of Yejili Mafic-ultramafic Intrusion, Inner Mongolia[J].Geoscience——Journal of Graduate School,China University of Geosciences,2005,19(4):515-521. |
| |
| Authors: | YAN Hai-qing TANG Zhong-li JIAO Jian-gang GENG Ke PAN Zhen-xing |
| |
| Institution: | 1 College of Earth Science and Land Resource, Chang’an University，Xi’an, Shaanxi710054，China；;
2 School of Earth Sciences & Resources, China University of Geosciences, Beijing100083, China |
| |
| Abstract: | Yejili intrusion in Inner Mongolia is situated at the 100 km northeast of Jinchuan Cu-Ni-PGE sulfide deposit.It consists of wehrlite,lhezolite,gabbro and diorite.The REE distribution pattern shows weak LREE richment characteristics,(La/Yb)_(N)=1.866-2.713,which are different from the characteristics of convergent plate marginal basalt.ε_(Nd)(t)>0 shows that the sources of magma come from depleted mantle.The value of Mg~(#) and Ni content in the intrusion show that it formed through crystal cumulus processes.Yejili intrusion and Jinchuan intrusion all belong to the continental-margin metallogenetic system of North China Craton.They have the same geochemical characteristics in m/f value,rare earth elements and trace elements.The nickel content in the Yejili intrusion is depleted.These characteristics show there is a potential forming of Cu-Ni sulfide(deposits) in the Yejili intrusion. |
| |
| Keywords: | Yejili intrusion petrological and chemical characteristics Cu-Ni-PGE sulfide deposit Jinchuan Inner Mongolia |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《现代地质》浏览原始摘要信息 |
| 点击此处可从《现代地质》下载免费的PDF全文 |
