| 安徽新桥块状硫化物矿床地球化学特征 |
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| 引用本文： | 李红阳,李英杰,侯增谦,杨竹森,蒙义峰,曾普胜,徐文艺.安徽新桥块状硫化物矿床地球化学特征[J].地质科学,2005,40(3):337-345. |
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| 作者姓名： | 李红阳 李英杰 侯增谦 杨竹森 蒙义峰 曾普胜 徐文艺 |
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| 作者单位： | 1. 石家庄经济学院勘查技术学院 石家庄 050031;2. 中国地质科学院矿产资源研究所 北京 100037 |
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| 基金项目： | 国土资源部科技专项基金 |
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| 摘 要： | 新桥块状硫化物矿床发育双层结构,地球化学特征也呈现出明显的“二元性”和垂向变化。下部网脉状蚀变矿化岩石SiO2、Al2O3、K2O和Na2O等含量较高,上部层状块状矿石和含矿岩石Fe2O3、FeO、CaO、MgO及SiO2等明显富集。稀土含量相对较低,上部层状块状矿层平均值为10.73×10-6,下部通道相蚀变矿化岩石平均值为126.1×10-6。重晶石δ34S值为+16.2‰,硬石膏δ34S值为+11.2‰,黄铁矿δ34S值为+1.5‰～+4.7‰。含矿硅质岩δ18O为+12.0‰～+13.9‰,下部通道相含黄铁矿石英脉δ18O值为+13.3‰～+18.6‰。自下部网脉状矿化到上部层状块状矿层,从粗晶细晶到变胶状胶状黄铁矿,δ34S、δ18O和δ30Si值逐渐降低,206Pb/204Pb、207Pb/204Pb和208Pb/204Pb平均值逐渐增高。
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| 关 键 词： | 块状硫化物矿床 二元结构 地球化学 安徽新桥 |
| 文章编号： | 0563-5020（2005）03-0337-09 |
| 收稿时间： | 2003-10-16 |
| 修稿时间： | 2003-12-02 |
GEOCHEMICAL FEATURES OF THE XINQIAO MASSIVE SULFIDE DEPOSIT IN ANHUI PROVINCE |
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| Li Hongyang,Li Yingjie,Hou Zengqian,Yang Zhusen,MENG Yifeng,ZENG Pusheng,Xu Wengyi.GEOCHEMICAL FEATURES OF THE XINQIAO MASSIVE SULFIDE DEPOSIT IN ANHUI PROVINCE[J].Chinese Journal of Geology,2005,40(3):337-345. |
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| Authors: | Li Hongyang Li Yingjie Hou Zengqian Yang Zhusen MENG Yifeng ZENG Pusheng Xu Wengyi |
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| Institution: | 1. Shijiazhuang University of Economics, Shijiazhuang 050031;2. Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037 |
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| Abstract: | The Xinqiao massive sulfide deposit had a two-layer texture, whose geochemical features were presented by a "binary ability" and a vertical change. The contents of SiO2,Al2O3,TiO2,K2O and Na2O were higher in the lower altered and mineralized rocks, while the Fe2O3,FeO,CaO,MgO and SiO2 were richer in the upper stratiform and massive ore beds and ore-bearing rocks. The REE contents, relatively enriched in HRR, were lower, with the average REE of the upper stratiform and massive ore beds being 10.73×10-6, and that of the lower channelway phase altered and mineralized rocks being 126.1×10-6, respectively. The δ34S value of barite was 16.2‰, that of anhydrite was +11.2‰, the δ34S values of pyrite ranged from +1.5‰ to +4.7‰. The δ18O values of ore-bearing silicalite ranged from +12.3‰ to +13.9‰, those of pyrite-bearing quartz vein in the lower channelway phase from +13.3‰ to +18.6‰. The average δ34S,δ18O and δ30Si decreased progressively with 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb increasing gradually from the lower stockwork mineralization to the upper stratiform massive ore bed, following descending crystallization of coarse-fine-metacolloform-colloform pyrite. |
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| Keywords: | Massive sulfide deposits Binary texture Geochemical features The Xinqiao mine in Anhui |
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