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| 内蒙古查干花钼矿床成矿流体特征及矿床成因 | |
| 引用本文： | 刘翼飞,聂凤军,江思宏,席忠,张志刚,肖伟,张可,刘勇.内蒙古查干花钼矿床成矿流体特征及矿床成因[J].吉林大学学报(地球科学版),2011,41(6):1794-1805. |
| 作者姓名： | 刘翼飞 聂凤军 江思宏 席忠 张志刚 肖伟 张可 刘勇 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,北京,100037 2. 内蒙古自治区第一地质矿产勘查开发院,呼和浩特,010020 3. 北京科技大学土木与环境工程学院,北京,100083 |
| 基金项目： | 国家重点自然科学基金项目(41030421); 中国地质调查局地质调查项目(1212010911029); 中国地质科学院基本业务费项目(K1012) |
| 摘 要： | 查干花矿床是近年来在内蒙古中部地区发现的大型斑岩矿床。矿体主要产出于云英岩化、硅化似斑状花岗岩体内。矿化与云英岩化、硅化具有密切关系。矿石主要呈细脉状、网脉状产出,主要的细脉类型有石英-辉钼矿-白云母脉、石英-辉钼矿脉。流体测温显示,查干花钼矿床中流体包裹体主要为气液两相包裹体,成矿期主阶段和成矿期晚阶段流体均一温度为147～387℃和161～322℃,盐度(w(NaCl))为2.6%～8.6%和0.4%～6.5%。激光拉曼成分分析显示,成矿流体主要为H2O-NaCl体系,并含有少量的CO2。与辉钼矿共生的石英-白云母矿物对氧同位素温度为384～653℃,比流体包裹体的均一温度高。辉钼矿于温度653℃、压力200MPa(静岩压力深度7.4km)左右开始沉淀,主要形成于温度384～416℃、压力40～65MPa(静水压力深度4～6.5km)。在成矿流体从成矿期主阶段向成矿期晚阶段演化的过程中,随着温度降低,成矿流体盐度逐渐降低。结合氢氧同位素研究显示,查干花矿床的成矿流体主要来源于去气岩浆水。矿床的形成与经历了明显去气作用的低盐度流体的长期演化有关,成矿流体气相组分的分离是辉钼矿沉淀的重要因素。 |
| 关 键 词： | 斑岩 钼矿床 流体包裹体 氢氧同位素 氧同位素温度计 查干花 内蒙古 |
Ore-Forming Fluid Characteristics and Ore Genesis of Chaganhua Porphyry Molybdenum Deposit in Central Inner Mongolia,China |
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| LIU Yi-fei,NIE Feng-jun,JIANG Si-hong,XI Zhong,ZHANG Zhi-gang,XIAO Wei,ZHANG Ke,LIU Yong.Ore-Forming Fluid Characteristics and Ore Genesis of Chaganhua Porphyry Molybdenum Deposit in Central Inner Mongolia,China[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(6):1794-1805. | |
| Authors: | LIU Yi-fei NIE Feng-jun JIANG Si-hong XI Zhong ZHANG Zhi-gang XIAO Wei ZHANG Ke LIU Yong |
| Institution: | LIU Yi-fei1,NIE Feng-jun1,JIANG Si-hong1,XI Zhong2,ZHANG Zhi-gang2,XIAO Wei1,ZHANG Ke3,LIU Yong3 1.Institute of Mineral Resources,CAGS,Beijing 100037,China 2.No.1 Geological Party of Inner Mongolia Bureau of Geology and Mineral Resources Exploration and Development,Hohhot 010020,China 3.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China |
| Abstract: | Chaganhua porphyry molybdenum deposit is a newly discovered large-scale deposit in central Inner Mongolia.Ore bodies are mainly hosted in the greisenizated and silicified granite.Molybdenum mineralization is closely associated with greisenization and silicification and is characterized by quartz-molybdenum-muscovite and quartz-molybdenum stockwork veins.Fluid inclusions in quartz of the major metallogenic stage and late molybdenum mineralization are mainly two-phase vapor-liquid inclusions with small amount... |
| Keywords: | porphyry molybdenum deposits fluid inclusion H-O isotopes oxygen isotopic fractionation temperatures Chaganhua Inner Mongolia |
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