| 陕西平利大磨沟-闹阳坪萤石矿床流体包裹体特征 |
| |
| 引用本文： | 韩鹏飞,杨兴科,张文高,樊培贺.陕西平利大磨沟-闹阳坪萤石矿床流体包裹体特征[J].地质与资源,2014,23(3):284-287. |
| |
| 作者姓名： | 韩鹏飞 杨兴科 张文高 樊培贺 |
| |
| 作者单位： | 长安大学 地球科学与资源学院, 陕西 西安 710054 |
| |
| 基金项目： | 宝钢资源有限公司“陕西省平利县闹阳坪-大磨沟锌萤石矿区矿田构造与找矿预测研究”项目资助 |
| |
| 摘 要： | 陕西平利大磨沟-闹阳坪萤石矿床主要产于受区内近东西向F1断裂控制的次级断裂中,成矿过程可划分为4个阶段:伟晶方解石阶段(Ⅰ)、粗粒萤石(脉)-方解石萤石脉-石英萤石脉阶段(Ⅱ)、石英硫化物(闪锌矿)阶段(Ⅲ)、方解石细脉-萤石细脉成矿阶段(Ⅳ).岩相学观察表明,包裹体的主要类型有气液两相包裹体、纯气相包裹体,纯液相包裹体、CO2-H2O三相包裹体及含子矿物包裹体.显微测温表明,大磨沟萤石包裹体均一温度集中在295~340℃,闹阳坪矿区萤石包裹体均一温度集中在289~329℃.大磨沟萤石矿床流体包裹体盐度范围为0.5%~6.16%(NaCl质量分数).利用气液两相型包裹体对硫化物阶段成矿压力估算,结果为22.072~25.089 MPa,对应深度为0.7763~1.268 km.闹阳坪萤石矿床成矿流体盐度较高,根据流体盐度变化可初步推断热液流体运移方向.本区断裂发育,热液在运移过程中,在脆性构造裂隙空间的压力骤然降低下可能导致热液发生沸腾作用.
|
| 关 键 词： | 流体包裹体 萤石 成矿阶段 热液矿床 陕西 |
| 收稿时间： | 2013-06-07 |
CHARACTERISTICS OF FLUID INCLUSIONS OF THE DAMOGOU-NAOYANGPING FLUORITE DEPOSIT IN SHAANXI PROVINCE |
| |
| HAN Peng-fei,YANG Xing-ke,ZHANG Wen-gao,FAN Pei-he.CHARACTERISTICS OF FLUID INCLUSIONS OF THE DAMOGOU-NAOYANGPING FLUORITE DEPOSIT IN SHAANXI PROVINCE[J].Geology and Resources,2014,23(3):284-287. |
| |
| Authors: | HAN Peng-fei YANG Xing-ke ZHANG Wen-gao FAN Pei-he |
| |
| Institution: | College of Earth Sciences and Resources, Chang'an University, Xi'an 710054, China |
| |
| Abstract: | The Damogou-Naoyangping fluorite deposit of Shaanxi occurs in the secondary fractures of the regional east-westtrending fault F1. The metallogenesis can be divided into four stages, i.e. Ⅰ）giant calcite crystal stage; Ⅱ）coarse-grained fluorite-calcite fluorite-quartz fluorite stage; Ⅲ）quartz sulfide（sphalerite）stage; and Ⅳ）calcite veinlet-fluorite veinlet stage. The result of petrographic observations indicates that, the inclusions are mainly of gas-liquid two-phase, pure gas phase, pure liquid phase, CO2-H2O three-phase and daughter mineral-bearing type. Microthermometry reveals that the homogenization temperatures of fluid inclusions in fluorite of Damogou deposit range from 290 to 340 ℃, with salinities from0.5% to 6.16%（NaCl eqv.）. The gas-liquid two-phase fluid inclusions in fluorite yield trapping pressures of 22.072-25.089MPa, corresponding to a depth of 776.3-1268 m. The homogeneous temperatures of fluid inclusions of Naoyangping deposit are between 289 and 329 ℃, with a high salinities. The variation of salinity can be used to infer the migration direction of fluid. In the process of fluid migration, the abrupt reduce of pressure in the brittle structural fissures may result in hydrothermal boiling. |
| |
| Keywords: | fluid inclusions fluorite metallogenic period hydrothermal deposit Shaanxi Province |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地质与资源》浏览原始摘要信息 |
| 点击此处可从《地质与资源》下载免费的PDF全文 |
|
