| 湖南新田岭白钨矿床花岗岩地球化学特征研究 |
| |
| 引用本文： | 杨梧,戴塔根,张蒙龙.湖南新田岭白钨矿床花岗岩地球化学特征研究[J].国土资源导刊(湖南),2016(4). |
| |
| 作者姓名： | 杨梧 戴塔根 张蒙龙 |
| |
| 作者单位： | 1. 贵州理工学院 资源与环境工程学院,贵州 贵阳,550004;2. 中南大学地球科学与信息物理学院,湖南 长沙,410083 |
| |
| 基金项目： | 贵州省普通高等学校创新人才团队项目(黔教合人才团队字[2015]56号)。 |
| |
| 摘 要： | 新田岭钨矿为南岭成矿带中一处超大型钨矿床。大地构造位置上处于扬子板块和华夏板块间的钦杭结合带,南岭NE向构造—岩浆—成矿带的北缘。岩相学和岩石地球化学研究表明,黑云母花岗岩与成矿关系密切,后期花岗斑岩为铝过饱和,其演化程度较高,地球化学特征具I或S型花岗岩特征。构造判别图解显示,区内花岗岩为同碰撞花岗岩;Sm/Nd、Eu/Sm、Nb/Ta和Zr/Hf显示花岗岩来源于地壳,以上说明该地区花岗岩源于与幔源底侵作用有关的地壳重熔S型花岗岩,形成于同碰撞造山环境,地幔岩浆上侵主要为地壳重熔提供了热能;稀土元素特征显示:轻稀土元素富集,强烈的铕负异常,成"V"字形的稀土元素配分模式。新田岭钨矿成矿物质来源主要来源于花岗岩体,同时,石磴子组灰岩亦提供了部分成矿物质。
|
| 关 键 词： | 新田岭 花岗岩 微量元素 稀土元素 |
Research on Geochemical Characteristics of Xintianling Tungsten Deposit in Hunan |
| |
| Abstract: | Xintianling tungsten deposit is a super-large tungsten deposit in Nanling tungsten-tin mineralization belt. It lies in the central segment of the Qin-Hang junction zone and north-center of the east tectonic-magma-minerogenic belt. Ore body is mainly located in the internal contact zone, the surrounding rock is the limestone. Rocks of the Biotite granite are high K-calc-alkaline and weakly peraluminous.These rocks are depleted in Nb, Ta, P, Ti, Sr, but enriched in Rb, K, Pb, Th. it has a nearly “V” type REE pattern characterized and clear negative Eu anomalies. Late granite porphyry is supersaturated aluminum, it has a higher evolution degree and the geochemical features is likely S type granite. Chondrite normalized REE patterns with good consistency suggest the same or similar magma source and evolutionary history. Tectonic settings discriminating of trace element of granite shows the rock may be formed during the period of collisionorogeny and intraplate, especially in the conversion period both of them, in an extensional environment. |
| |
| Keywords: | Xintianling granite trace element rare earth element |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
