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| 内蒙古察右中旗乌兰巴山复式岩体的岩石学及地球化学特征 | |
| 引用本文： | 吴家富,陈园平,汪鹤林.内蒙古察右中旗乌兰巴山复式岩体的岩石学及地球化学特征[J].地质调查与研究,2012(1):22-28. |
| 作者姓名： | 吴家富 陈园平 汪鹤林 |
| 作者单位： | 1. 安徽省地质调查院,安徽合肥230001 2. 江西省地质矿产勘查开发局赣东北大队,江西上饶334000 3. 安徽省地质矿产勘查局321地质队,安徽铜陵244033 |
| 基金项目： | 内蒙古自治区地质勘查项目([2005]矿调1-8) |
| 摘 要： | 在1/5万袁家房子等四幅区域矿产地质填图的基础上,对乌兰巴山复式岩体的野外地质特征、岩石学、矿物学、地球化学和同位素年代学等方面进行了初步研究.同位素锆石U-Pb分析结果表明,206 Pb/238 U表面年龄为225.4±1.6 Ma岩体,侵位时代为早三叠纪.该岩体总体展布受区域北东向构造控制明显.岩石化学、地球化学表明该复式岩体属钙碱性岩;东壕欠闪长岩可能为地幔成因,并有地壳物质的加入,乌兰巴山等花岗岩、二长花岗岩可能为壳源成因.稀土元素配分曲线显示出向右倾的平坦曲线型,轻稀土富集,重稀土明显亏损,无明显的铕异常 |
| 关 键 词： | 复式岩体 地球化学特征 岩石学 乌兰巴山 内蒙古 |
Petrological and Geochemical Characteristics of the Composite Rock Mass in the Ulan Hill,Chahar Banner,Inner Mongolia |
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| WU Jia-fu,CHEN Yuan-ping,WANG He-lin.Petrological and Geochemical Characteristics of the Composite Rock Mass in the Ulan Hill,Chahar Banner,Inner Mongolia[J].Geological Survey and Research,2012(1):22-28. | |
| Authors: | WU Jia-fu CHEN Yuan-ping WANG He-lin |
| Institution: | 1.Anhui Institute of Geological Survey,Hefei 230001,China;2.Northeast Brigade of Jiangxi Bureau of Geology and mineral resources,Shangrao Jiangxi 334000,China;3.321 geological team of Anhui Provincial Bureau of Geology and mineral resources exploration,Tongling Anhui 244033,China) |
| Abstract: | In 1/50 000 Yuanjiafangzi and three other regional geological mapping,petrology,mineralogy,geochemical and isotopic chronology were studied based on the geological characteristics of the complex rock mass in the Ulan Hill Chahar Banner,Inner Mongolia.Isotope zircon U-Pb results,206 Pb / 238 U surface age 225.4±1.6 Ma,can be the Jurassic emplacement age.The rock mass distribution is controlled by the regional NE fault obviously.The rock geochemical data shows that it belongs to calc alkaline rock series.The Donghaokan diorite may be mantle origin with the crustal material mixing.Ulan Hill granites may be crust origin.REE curves showed a rightward flat type with LREE enrichment,HREE apparently absent,and no obvious Europium anomaly exist. |
| Keywords: | composite rock mass geochemical characteristics petrology Ulan Hill Inner Mongolia |
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