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| 新疆蒙库铁矿床稀土元素地球化学及对铁成矿作用的指示 | |
| 引用本文： | 杨富全,毛景文,徐林刚,张岩,刘锋,黄成林,周刚,刘国仁,代军治.新疆蒙库铁矿床稀土元素地球化学及对铁成矿作用的指示[J].岩石学报,2007,23(10):2443-2456. |
| 作者姓名： | 杨富全 毛景文 徐林刚 张岩 刘锋 黄成林 周刚 刘国仁 代军治 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,北京,100037 2. 中国地质大学地质过程与矿产资源国家重点实验室,北京,100083 3. 宁夏国土资源厅信息中心,银川,750002 4. 新疆富蕴县八钢蒙库铁矿采选分厂,新疆富蕴县,836100 5. 新疆地质矿产勘探开发局第四地质大队,阿尔泰,836500 |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金;国家科技支撑计划重点项目;国土资源部国土资源大调查项目 |
| 摘 要： | 新疆富蕴县蒙库大型铁矿呈层状、似层状、透镜状赋存于下泥盆统康布铁堡组变质火山-沉积岩系中.矿体中发育矽卡岩,但矽卡岩并不产在侵入岩接触带上.绿帘石、石榴石和矿石的稀土配分模式具有相似性,均为轻稀土富集,正铕异常,基本上无铈异常,暗示它们之间存在成因联系.石榴石稀土配分模式呈折线型,具有明显的正铕异常,石榴石流体包裹体中熔融包裹体、熔流包裹体和气液包裹体共存,表明石榴石矽卡岩具有岩浆成因和热液成因的特征,形成于晶体 熔体 流体三相共存的岩浆-热液过渡阶段.矿床地质特征、矽卡岩矿物和矿石稀土特征表明蒙库铁矿为矽卡岩型矿床. |
| 关 键 词： | 矽卡岩 稀土元素地球化学 铁矿床 成矿作用 蒙库 |
| 文章编号： | 1000-0569/2007/023(10)-2443-56 |
| 修稿时间： | 2007年6月20日 |
REE geochemistry of the Mengku iron deposit, Xinjiang, and its indication for iron mineralization |
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| YANG FuQuan,MAO JingWen,XU LinGang,ZHANG Yan,LIU Feng,HUANG ChengLin,ZHOU Gang,LIU GuoRen,DAI Junzhi.REE geochemistry of the Mengku iron deposit, Xinjiang, and its indication for iron mineralization[J].Acta Petrologica Sinica,2007,23(10):2443-2456. | |
| Authors: | YANG FuQuan MAO JingWen XU LinGang ZHANG Yan LIU Feng HUANG ChengLin ZHOU Gang LIU GuoRen DAI Junzhi |
| Abstract: | The large Mengku iron deposit,Fuyun County,Xinjiang,is hosted in the metamorphosed volcaniclastic-sedimentary rocks of the Lower Devonian Kangbutiebao Formation.The orebodies in the deposit occur as beds or lenses.There are skarns in the orebodies,but they do not occur in a contact zone of the intrusion.Epidote,garnet and ores have similar chondrite-normalized REE distribution patterns and are enriched in light REE(LREE)with a moderate Eu positive anomaly but no Ce anomaly,implying that there is genetic relation between ores and skarns.Garnet has kick-down-line-shaped REE distribution patterns with a pronounced Eu positive anomaly.Three types of fluid inclusion,namely melt inclusions,melt-fluid inclusions and two-phase aqueous type inclusions,have been recognized in garnet.The combined REE geochemistry and fluid inclusion studies imply that the garnet skarn is of magmatic origin and hydrothermal origin.The garnet skarn formed in the magmatic-hydrothermal transitional stage in which the crystal,melt and fluid phases coexist.The geological characteristics and REE geochemistry of skarn minerals and ores suggest that the Mengku iron deposit is best classified as a skarn-type iron deposit. |
| Keywords: | Skarn REE geochemistry Iron deposit Mineralization Mengku |
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