| 云南会泽超大型铅锌矿床HTD白云岩的厘定及其形成机制 |
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| 引用本文： | 文德潇,韩润生,王峰,贺姣姣,邱文龙,夏颜乐,陈随海,倪尔建.云南会泽超大型铅锌矿床HTD白云岩的厘定及其形成机制[J].岩石矿物学杂志,2014,33(6):1086-1098. |
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| 作者姓名： | 文德潇 韩润生 王峰 贺姣姣 邱文龙 夏颜乐 陈随海 倪尔建 |
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| 作者单位： | 昆明理工大学有色金属矿产地质调查中心西南地质调查所;云南驰宏锌锗股份有限公司;昆明理工大学土木工程学院; |
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| 基金项目： | 国家自然科学基金项目(U1133602,40863002);中国地调局典型矿集区评价示范子项目“滇东北矿集区找矿预测(2014)”;国家危机矿山专项(20089943);云南省自然科学基金重点项目(2010CC005);云南省矿产资源预测评价工程实验室(2010)和省、校创新团队项目 |
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| 摘 要： | 会泽超大型铅锌矿床是世界著名的特富铅锌矿床之一,热液白云岩(HTD)是其赋矿围岩,本文在典型剖面精细测量和镜下鉴定的基础上,将矿区的白云岩划分为埋藏白云岩与HTD白云岩两类,并结合包裹体研究对HTD白云岩进行厘定,结果表明:1研究矿床HTD白云岩产出受NE向压扭性层间断裂控制,优先发育在断层上盘。2发育大量裂(孔)隙,溶孔具有线状与面状分布特征。3鞍状白云石颗粒粗大,呈肉红色、灰白色或棕色,具独特尖顶、他形鞍状、曲面鞍形、曲面接触、晶内微裂隙、溶孔,见波状消光与雾心亮边。4鞍状白云石呈厚层状产出,与黄铁矿等热液矿物共生,并发育晶洞充填物。5鞍状白云石具基质交代型和孔-缝充填型,在HTD白云岩与灰质白云岩狭窄过渡带,见伴随其形成而形成的斑马状构造、角砾状构造。6 NW向张性断裂带为构造流体运移通道,发育网脉状白云石化,其白云石包裹体均一温度高(250~438℃),盐度变化范围大(3.4%~17.2%)。NE向压扭性断裂带为构造流体成岩场所,控制厚层状白云石化展布,其白云石包裹体均一温度高(180~354℃),盐度低(1.1%~5.9%)。通过对矿区HTD白云岩形成的流体驱动机制、流体性质、裂(孔)隙特征、矿化指示分析,得出"在挤压背景下,受碳酸盐岩地层中的NE向压扭性层间断裂带控制"的HTD白云岩成因认识,即:1区域冲断褶皱作用是流体运移的深部动力机制;2偏酸性富CO2的中高温-中盐度流体在冲断褶皱构造系统内大量集聚,在其配套的NE向压扭性层间断裂上盘与膨胀部位形成厚层状白云岩。3裂(孔)隙对流体多期次与成岩强度具有指示意义。4 HTD白云岩岩性分带、成岩强度、构造特征(显微构造)对矿体产出具有指示意义。
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| 关 键 词： | HTD白云岩 鞍状白云石 会泽铅锌矿床 滇东北矿集区 |
| 收稿时间： | 2014/3/20 0:00:00 |
| 修稿时间： | 2014/10/20 0:00:00 |
Features and formation mechanism of HTD dolomites in the Huize lead-zinc deposit, Yunnan Province |
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| WEN De-xiao,HAN Run-sheng,WANG Feng,HE Jiao-jiao,QIU Wen-long,XIA Yan-le,CHEN Sui-hai and NI Er-jian.Features and formation mechanism of HTD dolomites in the Huize lead-zinc deposit, Yunnan Province[J].Acta Petrologica Et Mineralogica,2014,33(6):1086-1098. |
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| Authors: | WEN De-xiao HAN Run-sheng WANG Feng HE Jiao-jiao QIU Wen-long XIA Yan-le CHEN Sui-hai and NI Er-jian |
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| Institution: | College of Land Resource Engineering, Kunming University of Science and Technology; Southwest Geological Survey, Geological Survey Center of Nonferrous Metal Resources, Kunming 650093, China;Yunnan Chihong Resource Exploration and Development Co., Ltd., Qujing 655011, China;College of Land Resource Engineering, Kunming University of Science and Technology; Southwest Geological Survey, Geological Survey Center of Nonferrous Metal Resources, Kunming 650093, China;Yunnan Chihong Resource Exploration and Development Co., Ltd., Qujing 655011, China;College of Land Resource Engineering, Kunming University of Science and Technology; Southwest Geological Survey, Geological Survey Center of Nonferrous Metal Resources, Kunming 650093, China;College of Land Resource Engineering, Kunming University of Science and Technology; Southwest Geological Survey, Geological Survey Center of Nonferrous Metal Resources, Kunming 650093, China;Yunnan Chihong Resource Exploration and Development Co., Ltd., Qujing 655011, China;Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China;Yunnan Chihong Resource Exploration and Development Co., Ltd., Qujing 655011, China |
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| Abstract: | |
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| Keywords: | HTD saddle-shaped dolomite Huize lead-zinc deposit northeast Yunnan ore concentration area |
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