| 内蒙古东乌旗朝不楞铁矿区中粗粒花岗岩SHRIMP定年及其意义 |
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| 引用本文：陈郑辉,张彤,张玉清.2010.SHRIMP dating of medium-coarse-grained granite in Chaobuleng iron deposit, Dong Ujimqin Banner, Inner Mongolia [J].Mineral Deposits,29(2):317~322 |
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| 基金项目:内蒙古自治区地质勘查项目“内蒙古重要矿产资源潜力评价及区域成矿规律研究（［2007］院士3-1） |
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| 中文摘要:内蒙古东乌旗朝不楞铁矿床位于二连-东乌旗多金属成矿带的东端。对与朝不楞铁矿床有密切成因联系的中粗粒花岗岩进行了SHRIMP定年，获得了（136.9±1.5）Ma的精确年龄。该年龄与成矿年龄（140.7±1.8） Ma（Re-Os）在误差范围内相一致，说明成矿作用与成岩作用基本上是同时发生的。对该带区域成矿地质背景进行分析后认为，该带以燕山期成矿为主。 |
| 中文关键词:地质学 朝不楞矽卡岩型铁矿床 SHRIMP定年 二连_东乌旗多金属成矿带 内蒙古 |
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| SHRIMP dating of medium-coarse-grained granite in Chaobuleng iron deposit, Dong Ujimqin Banner, Inner Mongolia |
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| Abstract:The Chaobuleng iron deposit is located in the Erlianhaote-Dong Ujimqin Banner polymetallic metallogenic belt of Inner Mongolia. The medium-coarse-grained granit e in the area has close genetic relationship with the Chaobuleng skarn iron deposit, and hence was chosen to determine the SHRIMP U-Pb age. The results show tha t the granite intruded in (136.9±1.5) Ma, which is consistent to the mineralization age of (140.7±1.8) Ma (Re-Os）, suggesting that the mineralization and the rock-forming process occurred at the same time. An analysis of regional metallogenic geological setting shows that mineralization of the metallogenic belt might have occurred in Yanshanian period. |
| keywords:geology, Chaobuleng skarn iron deposit, SHRIMP dating, Erlianhot-Dong Ujimqin Banner polymetallic metalllogenic belt, Inner Mongolia |
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