| 贾润幸,尹艳广,方维萱,胡龙华,李述国,张凯,李建军.内蒙古额济纳旗乌兰苏海地区金矿化特征及成因[J].矿产勘查,2026,17(7):1141-1150 |
| 内蒙古额济纳旗乌兰苏海地区金矿化特征及成因 |
| Gold mineralization characteristics and genesis in the Wulansuhai area, Ejina Banner, Inner Mongolia |
| 投稿时间：2026-01-22 |
| DOI：10.20008/j.kckc.202607002 |
| 中文关键词: 流体包裹体 重砂 金矿 额济纳旗 内蒙古 |
| 英文关键词: fluid inclusion heavy mineral sands gold deposit Ejina Banner Inner Mongolia |
| 基金项目:本文受阿拉善盟融拓铜业开发有限公司项目“内蒙古额济纳旗格日勒图铜多金属矿概略研究及外围前景分析”(20250701)资助。 |
|
| 摘要点击次数: 448 |
| 全文下载次数: 270 |
| 中文摘要: |
| 内蒙古额济纳旗乌兰苏海地区金矿化点位于塔里木板块东北缘与华北板块西北缘的交汇区，该区成矿地质条件复杂，先后经历了多期岩浆侵入作用，本文对该区含金石英脉中石英流体包裹体、含金矿物和重砂矿物等进行了分析测试，分析结果表明乌兰苏海金矿化区金矿石英矿物含烃盐水包裹体气液比 20%～ 35%，平均为 26%；石英中的气体包裹体主要为 CO2，属于 CO2-H2O-NaCl系统。包裹体均一温度 265 ℃～ 340 ℃，平均温度为 297.22 ℃；包裹体盐度(wt％NaCl)4.18～7.31，平均为 6.38，总体上属于低盐度中温流体；乌兰苏海金矿化区金矿石中重砂矿物除银金矿外，主要为赤褐铁矿、黄铁矿、方铅矿、重晶石、毒砂、自然金、锐钛矿等，结合本区区域成矿地质背景及典型矿床年代学对比研究，认为内蒙古乌兰苏海金矿化主要与华力西期二叠系中酸性岩浆热液作用有关。 |
| 英文摘要: |
| The gold mineralization site in the Wulansuhai area of Ejina Banner, Inner Mongolia, is located atthe intersection of the northeastern margin of the Tarim Plate and the northwestern margin of the North China Plate.The geological conditions for mineralization in this area are complex, having undergone multiple phases of magmaticintrusion. This article analyzes and tests quartz fluid inclusions, gold-bearing minerals, and heavy minerals in thegold-bearing quartz veins in the area. The analysis results indicate that the gas-liquid ratio of hydrocarbon-bearing aqueous inclusions in quartz minerals at the Wulansuhai gold mineralization site is 20% to 35%, with an average of26%. The gas inclusions in quartz are mainly CO2, belonging to the CO2-H2O-NaCl system. The homogenizationtemperature of quartz mineral inclusions ranges from 265 ℃ to 340 ℃, with an average temperature of 297.22 ℃;the salinity of the inclusions (wt% NaCl) is between 4.18 and 7.31, with an average of 6.38, generally belonging tolow-salinity moderate-temperature fluids. In the gold mineralization site of Wulansuhai, the heavy minerals, exclud-ing silver-gold ore, primarily consist of hematite, pyrite, galena, barite, arsenopyrite, native gold, and anatase.Based on the regional metallogenic geological background and comparative studies on the chronology of typical de-posits in this area, it is believed that the gold mineralization site in Wulansuhai, Inner Mongolia, is primarily relatedto the Variscan Permian intermediate-acidic magmatic hydrothermal activity. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|