| 瑶岭钨矿白基寨花岗岩地质特征及成矿意义 |
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| 引用本文： | 李社宏,李文铅,丁玉进,刘建平,梁前勇,曹志明.瑶岭钨矿白基寨花岗岩地质特征及成矿意义[J].大地构造与成矿学,2010,34(1). |
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| 作者姓名： | 李社宏 李文铅 丁玉进 刘建平 梁前勇 曹志明 |
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| 作者单位： | 中国科学院,广州地球化学研究所,成矿动力学重点实验室,广东,广州,510640;中国科学院,研究生院,北京,100049;中国科学院,广州地球化学研究所,成矿动力学重点实验室,广东,广州,510640;青海省地质调查院,青海,西宁,810012;广东省有色地质研究院,广东,广州,510080 |
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| 基金项目： | 文章受全国危机矿山勘查项目 |
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| 摘 要： | 通过地质填图、钻探、土壤地球化学、磁法测量和岩石地球化学等手段,揭露了白基寨花岗岩的空间架构和地质特征,并分析了花岗岩的地球化学特征。该岩体具有高分异性(SiO270%,δEu在0.03～0.09之间),高K2O,且K2O/Na2O1等特征。Ba、Nb、P和Ti相对亏损,Rb、Ta、Th和K等大离子亲石元素富集,稀土元素四分组效应明显,呈海鸥"V"型。花岗岩源岩为泥质岩和硬砂岩混合而成,形成于同碰撞环境。岩体具有边部倾角小,高挥发份元素向上运移明显、强烈流体、熔体相互作用等有利成矿条件特点,在岩体边部成矿流体与碳酸岩盐相互作用形成白钨矿化体。矿区中部凹勺状区域和ZK3002-ZK3001段是找矽卡岩型白钨矿的有利潜在区域。
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| 关 键 词： | 瑶岭钨矿 白基寨 过铝花岗岩 |
Geological Characteristics of the Baijizhai Granite and Its Metallogenetic Significance in the Yaoling Tungsten Deposits |
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| LI Shehong,LI Wenqian,DING Yujing,LIU Jianping,LIANG Qianyong,CAO Zhiming.Geological Characteristics of the Baijizhai Granite and Its Metallogenetic Significance in the Yaoling Tungsten Deposits[J].Geotectonica et Metallogenia,2010,34(1). |
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| Authors: | LI Shehong LI Wenqian DING Yujing LIU Jianping LIANG Qianyong CAO Zhiming |
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| Abstract: | The major quartz vein wolframite occurs in the Yaoling tungsten deposits, where there is new found skarn scheelite without wolframite in the Baijizhai area. We identified the space frame, characters and geochemistry of the Baijizhai granite by drilling, geological, geochemical and geophysical surveys. The granite is high differentiation (SiO_2＞70%,the value of δEu is between 0.03 and 0.09), high K_2O content, K_2O/Na_2O＞1, relative depleted in elements Ba、Nb、P and Ti,rich in Rb、Ta、Th and K. REEs have a significant four cluster effect "V". The original rock of the Baijizhai granite is a mixture of argillaceous rocks and greywacke and a collisional product of mature continental margins. The granite was formed in a syn-collision setting. There are a few favorable conditions to form tungsten deposits, such as a small angle of granitic edge, upward migration of high-volatile elements, a strong interaction of fluids and melts. Finally, scheelite mineralization occurs at the edge of granitic rock bodies by the interaction of rock-forming fluids and carbonate rocks. Central spoon-shaped concave sites and the ZK3002-ZK3001 zone are potentially favorable regions to prospect skarn scheelite deposits. |
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| Keywords: | Yaoling tungsten deposits Baijizhai peraluminous granites skarn scheelite deposit |
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