从流体包裹体特征探讨泥堡金矿成因  

Discussion on Origin of Nibao Gold Deposit in View of the Characteristics of Fluid Inclusion

作　　者：刘平[1] 杜芳应[1] 杜昌乾[1] 雷志远 樊正烈 徐石辉[1] 阚小波[1] 

机构地区：[1]贵州省地矿局106地质大队,贵州遵义563000 [2]贵州省地质调查院,贵州贵阳550004

出　　处：《贵州地质》2006年第1期44-50,共7页Guizhou Geology

基　　金：国土资源部大调查项目(200110200043)资助

摘　　要：泥堡金矿床据脉石矿物和萤石的包裹体研究,包裹少而小,类型较为简单。综合包裹体各项参数和气液成分分析认为,成矿流体属NaCl-H_2O体系的富K^+的、弱酸性溶液,具有较高密度、较低盐度和中-低温度的特点。结合硫和氢氧同位素测定结果,成矿流体是燕山运动阶段的地表水沿断裂深循环,特别是在富K、富Au的凝灰岩中往复循环作用形成的。当各种条件具备时即可卸载成矿,成矿的最佳位置就是沿P_(2-3)β_1与P_2m^(dc)之间沉积间断面发生的层间滑动构造带。The analysis of integrating different parameters and gas - liquid elements, the mineralization fluid of Nibao gold deposit belong to the kalium - rich, weakly acid solution in the NaC1 - H20 system, which possess of the characteristic of higher density, lower salinity and low - middle temperature. Linking with determined results on sulfur and oxyhydrogen, the mineralization fluid formed from the deep circulation of the surface water along the fracture, especially from circulation repeating in the potassium - and gold - rich tuff. When providing with sorts of the terms, the ores may be generated by unloading, the ore - forming favorite site is in the interlayer slide structural zone along the interbedded sedimentary discontinue happened between first Member of the Permian Emeishan Formation and Dachang Member of the Permian Maokou Formation.

关 键 词：流体包裹体 成因 泥堡金矿 贵州 

分 类 号：P618.51[天文地球—矿床学]