| 青城子铅锌矿床成因分析 |
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| 引用本文： | 董存杰. 青城子铅锌矿床成因分析[J]. 地质与勘探, 2010, 46(1): 59-69 |
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| 作者姓名： | 董存杰 |
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| 作者单位： | 中国地质大学,北京,100083;辽宁有色地质局沈阳地质勘查院,沈阳,110121;中国地质调查局,北京,100037;中国有色地质调查中心,北京,100012 |
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| 摘 要： | 青城子铅锌矿床是我国北方的大型铅锌矿床,矿区赋矿层位下部产出层状矿体,上部产出脉状及不规则状矿体。经过对矿区矿石及岩石的铅、硫同位素研究表明,层状及脉状矿体成矿物质来源相同,主要来自地层。根据矿区内含硫矿物的组合特征、成矿流体的pH值及含硫矿物δ34S分布特征可以推断矿床成因不属于海相沉积成因。矿石中石英流体包裹体特征表明矿床形成后未遭受区域变质作用,成矿流体的温度180～280℃,流体成分Na+K+,Ca2+Mg2+,K+/Na+为0.66,Ca2+/Mg2+为6.67,(CH4+H2+N2)/CO2值为0.012～0.048,为Na+?Ca2+?Cl-弱还原型溶液,pH值为6.31。流体特征与矿区内的花岗岩相差较大,与变质热液有所差异,经流体的氢氧同位素测定,成矿热液具地热水氢氧同位素特征相似。综合研究表明,矿床的成因与区域变质期后局部地区的的混合岩化作用关系密切,由混合岩化作用分异的气水热液与地下水、层间水等混合后沿早期形成的层间滑脱部位和断裂充填成矿,形成了青城子矿田‘下层上脉’的空间组合。
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| 关 键 词： | 青城子 铅锌矿床 混合岩化作用 层控矿床 断层 |
| 收稿时间： | 2009-09-30 |
| 修稿时间： | 2009-11-08 |
Analysis of the Metallogenesis of Qingchengzi Pb-Zn Ore Deposit |
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| DONG Cun-jie. Analysis of the Metallogenesis of Qingchengzi Pb-Zn Ore Deposit[J]. Geology and Prospecting, 2010, 46(1): 59-69 |
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| Authors: | DONG Cun-jie |
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| Affiliation: | 1. China University of Geosciences;Beijing 100083;2.Shenyang Geological Exploration Institute;Liaoning Nonferrous Geological Exploration Institute;Shenyang 110121;3.China Geological Survey;Beijing 100037;4.China Nonferrous Metals Resource Geological Survey;Beijing 100012 |
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| Abstract: | The Qingchengzi is a large-scale Pb-Zn ore deposit in North China.Within the ore-hosting strata,stratiform orebodies are located in the lower portion,whereas veined and irregular orebodies in the upper.A study on lead and sulfur isotopes in ores and rocks from the deposit indicates that the metallogenetic material of both the stratiform and veined orbodies mainly originated from the strata.We exclude the possibility of a marine depositional environment for the metallogenesis of Qingchengzi deposit based on ... |
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| Keywords: | Qingchengzi Pb-Zn ore deposit migmatization strata-bound deposit fault |
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