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| 花敖包特银多金属矿矿床地质及成矿流体特征 | |
| 引用本文： | 陈伟,李应栩,王硕,李政,薜怀民,童英.花敖包特银多金属矿矿床地质及成矿流体特征[J].有色金属(矿山部分),2008,60(5). |
| 作者姓名： | 陈伟 李应栩 王硕 李政 薜怀民 童英 |
| 作者单位： | 1. 北京科技大学土木与环境工程学院,北京,100083 2. 内蒙古地质勘查有限责任公司,呼和浩特,010020 3. 中国地质科学院地质研究所,北京,100037 |
| 摘 要： | 花敖包特矿区矿体产于二叠系砂岩和侏罗系凝灰岩中。岩矿相和扫描电镜和能谱分析表明,闪锌矿和方铅矿是矿床的主要矿石矿物。通过对主要脉石矿物石英中流体包裹体的岩相学分析、显微测温分析、包裹体气液相成分的LRM分析和包裹体中水的氢氧同位素分析,结果表明,石英中包裹体为富水的气液两相包裹体,流体包裹体均一温度为157～318℃。冰点温度在-0.5～-3.1℃,据冰点估算的盐度在0.88～6.3wt%Na-Cleq。包裹体气液相成分的LRM分析表明,包裹体气液相成分均为H2O。包裹体中H2O的氢氧同位素表明,其中δD在-102～-128,说明成矿流体来源于岩浆水与大气降水的混合。硫同位素值在-0.4～-4.5之间,说明成矿物质来源于岩浆热液。结合矿床地质和包裹体显微测温结果,认为该矿床为一与岩浆活动有关的中低温热液矿床。 |
| 关 键 词： | 花敖包特 地质特征 流体特征 中低温热液 |
Geological and mineralizing fluid's characters of hua'aobaote Silver-polymetallic ore deposit |
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| Authors: | CHEN We LI Yingxu WANG Shuo LI Zheng XUE Huaiming TONG Ying |
| Abstract: | Orebodies in Hua'aobaote ore deposit are located in sandstone of Permian and tuff of Jurassian.Through petrography,SEM and power spectrums analysis,Galena and sphalerite are main ore minerals.Fluid inclusions in quartz are rich-liquid and two phrase by petrography.Homogeneous temperature are between 157～318℃and ice temperature are between-0.5～-3.1℃ by microther mometry and sanity are between 0.88～6.3wt%NaCleq according to ice temperature.Vapor and liquid phrase's Contents of fluid inclusion are both water by LRM analysis.δD is between-102～-128 and imply that ore fluid is derived from mixture between magmatic hydrothermal and meteoric water.Sulfur isotope is between-0.4～-4.5 imply that resource of deposit is derived from magmatic hydrothermal.Hua'aobaote ore deposit is intermediate-epithermal deposits related to magmatic hydrothermal. |
| Keywords: | Hua'aobaote geological character fluid characters intermediate-low hydrothermal |
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