| 陕西庞家河金矿成矿地质特征及成矿物质来源研究 |
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| 引用本文： | 吴孔运,高利鹏.陕西庞家河金矿成矿地质特征及成矿物质来源研究[J].中国地质,2011,38(3):716-723. |
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| 作者姓名： | 吴孔运 高利鹏 |
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| 作者单位： | 陕西省核工业地质局二一一大队,陕西西安,710024 |
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| 基金项目： | 陕西省凤县庞家河金矿接替资源勘查项目(200761105)资助 |
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| 摘 要： | 庞家河金矿产于既是矿源层又是赋矿主岩的上泥盆统下东沟组绢云千枚岩、变质砂岩中。金矿体主要赋存在膨胀、收缩、分枝、复合及波状弯曲的层间挤压片理化带中。矿体形态简单,主要为似层状、板状及透镜状,矿体沿走向较稳定,但倾向及倾角变化较大。主要金矿物为自然金、银金矿,载金矿物为黄铁矿及毒砂。主要围岩蚀变是中低温黄铁矿化和毒砂化。成矿期主要分为3个不同的阶段,即:石英-粗粒黄铁矿-水云母阶段、细粒黄铁矿-毒砂阶段和黄铁矿-石英-碳酸盐阶段。此外,通过对庞家河金矿硫、氧及铅稳定同位素分析,发现矿石铅主要来源于上地壳,部分来源于地幔。δ34S值揭示了金成矿流体主要来源于地壳流体,部分起源于岩浆。同样,δ18O值显示成矿热液部分来源于岩浆水,大部分来源于变质水。总之,庞家河金矿成矿物质来源是储库混合源。
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| 关 键 词： | 地质特征 成矿物质来源 庞家河金矿 陕西省 |
Geological characteristics and ore-forming material sources of the Pangjiahe gold deposit in Shaanxi Province |
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| WU Kong-yun,GAO Li-peng.Geological characteristics and ore-forming material sources of the Pangjiahe gold deposit in Shaanxi Province[J].Chinese Geology,2011,38(3):716-723. |
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| Authors: | WU Kong-yun GAO Li-peng |
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| Institution: | WU Kong-yun,GAO Li-peng(No.211 Geological Party,Nuclear Geological Bureau of Shaanxi Province,Xi'an 710024,Shaanxi,China) |
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| Abstract: | Ores in the Pangjiahe gold deposit are mainly distributed in upper Devonian Xiadonggou Formation rocks consisting of chloritized sericite phyllite and blastopsammitic quartz sandstone,which constitute a gold-bearing rock series and abundant source layers of gold.Gold ore bodies are mostly preserved in interlayer compresso-crushed zones which assume expansion,contraction,branching,compounding and wavelike bending.Ore bodies exhibit layered and lenticular shapes.Minerals mainly include native gold and electru... |
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| Keywords: | geological characteristics source of ore-forming materials Pangjiahe gold deposit Shaanxi province |
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