| 刘灵,杨宏辉,石庆鹏.贵州热液型重晶石矿集区地质特征及成矿规律[J].贵州地质,2019,36(3):207-214 |
| 贵州热液型重晶石矿集区地质特征及成矿规律 |
| Geological Characteristics and Metallogenic Regularity of Hydrothermal Barite Ore-concentrating District in Guizhou Province |
| 投稿时间：2019-01-04 |
| DOI： |
| 中文关键词: 重晶石 热液型 矿集区 成矿规律 贵州 |
| 英文关键词:Barytes Hydrothermal type Ore-concentrating district Metallogenic regularity Guizhou |
| 基金项目:中国矿产地质志·贵州卷，(项目编号:DD20190379-28)项目资助。 |
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| 中文摘要: |
| 贵州热液型重晶石矿分布主要在黔东北、黔南及黔东南地区，矿床具有成群、成带和集中分布特点。按照构造分区、矿床式及矿床边界等原则，将贵州热液型重晶石矿床划分为务川-湄潭重晶石矿集区和施秉-都匀重晶石矿集区，按矿床产出构造部位不同分为丰水岭式和顶罐坡式。前者产于黔北隆起区，矿床以萤石、重晶石共生为特征；后者产于黔南坳陷区，矿床以单一重晶石为特征。矿床主要受地层、岩相、构造和Si/Ca界面的控制。建立“矿源层-容矿层-盖层”的找矿模式，区内下寒武系牛蹄塘组(留茶坡组)黑色岩系为主矿源层；当大气降水下渗地下，受地热增温作用发生水-岩反应形成热卤水，热卤水与Ba元素混合形成含矿流体；当成矿流体通过深大断裂运移上升至Si/Ca界面附近发生侧向分异，导致矿液在容矿层(碳酸盐岩)断裂构造带内充填-交代成矿。 |
| 英文摘要: |
| Hydrothermal barite deposits in Guizhou Province are mainly distributed in northeastern Guizhou, southern Guizhou and southeastern Guizhou, these deposits are characterized by clustering, zoning and concentrated distribution. According to the principles of tectonic zoning, deposit model and deposit boundary, this paper divides the douren-hydrothermal barite deposit in guizhou province into the concentrated distribution area of wuchuan - meitan barite deposit and shibing-duyun barite deposit, And according to the structural position of the deposit, it can be divided into Fengshuiling type and top tank slope type. The former is distributed in the northern Guizhou uplift area, and the deposit is characterized by the coexistence of fluorite and barite, The latter is distributed in Qiannan depression area, and the deposit is characterized by barite alone. The deposit is mainly controlled by strata, lithofacies, structure and Si/Ca interface. The ore-forming process of the deposit is as follows: the black rock series of the Niutitang Formation (Liuchapo Formation) of the Lower Cambrian in the area is the main source bed,When atmospheric precipitation infiltrates underground, influenced by geothermal warming, water-rock reaction occurs to form hot brine, which then mixes with Ba elements to form ore-bearing fluid,When the ore-forming fluid encounters the barrier action of the caprock (shale of the overlying Meitan Formation) in the process of ascending and migrating, the ore-forming fluid fills and metasomatizes in the fault structural zone of the ore-bearing horizon (carbonate rock) and finally forms the ore body. |
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