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| 甘肃阳山金矿床含砷黄铁矿及毒砂的XPS研究 | |
| 引用本文： | 杨荣生,陈衍景,谢景林.甘肃阳山金矿床含砷黄铁矿及毒砂的XPS研究[J].岩石学报,2009,25(11):2791-2800. |
| 作者姓名： | 杨荣生 陈衍景 谢景林 |
| 作者单位： | 1. 北京大学造山带与地壳演化重点实验室,北京,100871;中国石油勘探开发研究院,北京,10083 2. 北京大学造山带与地壳演化重点实验室,北京,100871;中国科学院广州地球化学研究所成矿动力学重点实验室,广州,510640 3. 北京大学化学与分子工程学院,北京,100871 |
| 基金项目： | 国家973项目2006CB403508课题;国家自然科学基金项目，国家危机矿山项目，科学院知识创新工程项目和武警黄金部队科研项目的资助 |
| 摘 要： | 阳山金矿是西秦岭地区新发现的超大型金矿.载金矿物中元素的赋存状态是认识成矿机理、评价矿床采选冶过程对环境影响的重要依据.作者运用XPS技术测定了载金矿物含砷黄铁矿和毒砂新鲜断裂面的As3d、Fe2p及S2p的存在形式和相对原子百分含量.结果表明,在含砷黄铁矿表面,超过50%的As以As~(-1)形式存在,约18%～20%的As以As~(3+)形式存在,约30%的As以As~(5+)形式存在.在毒砂表面,超过60%的As以As~(1-)形式存在,约30%的As~(3+)形式存在,其余10%的As主要以As~(3+)形式存在.分析证明As、Fe、S等元素在含砷黄铁矿和毒砂中主要以As`(1-)、Fe~(2+)、S~(1-)形式存在外,As元素可能还以As~(3+)形式存在于含砷黄铁矿及毒砂结构中. |
| 关 键 词： | 阳山金矿 含砷黄铁矿 毒砂 元素赋存状态 |
X-ray photoelectron spectroscopic study on arsenian pyrite and arsenopyrite from the Yangshan gold deposit, Gansu province(North China) |
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| YANG RongSheng,CHEN YanJing,XIE JingLin.X-ray photoelectron spectroscopic study on arsenian pyrite and arsenopyrite from the Yangshan gold deposit, Gansu province(North China)[J].Acta Petrologica Sinica,2009,25(11):2791-2800. | |
| Authors: | YANG RongSheng CHEN YanJing XIE JingLin |
| Abstract: | The Yangshan superlarge gold deposit is recently found in western Qinling Orogen.The element occurrence in ore minerals is an important parameter to understand gold mineralization and to evaluate impact on environment during mining,beneficiation and metallurgie process.Using X-ray photoelectron spectroscopy(XPS),the authors analyze the valence state and molar compositions of As3d、Fe2p and S2p species on the surface of gold-bearing arsenian pyrite and arsenopyrite from the Yangshan gold deposit.The results indicate that on the surfaces of arsenian pyrite,more than 50% arsenic occurs as As~(1-),18%～20% as As~(3+),and 30% as Ass5+;while on the surfaces of arsenopyrite,more than 60% arsenic oocurrs as As~(1-),about 30% as As~(3+),and less than 10% as As~(5+).This shows that As,S and Fe are mainly occur as As~(1-),S~(1-)and Fe~(2+)in arsenian pyrite and arsenopyrite,respectively,but scientifically more important,As can also occur as As~(3+). |
| Keywords: | XPS Yangshan gold deposit Arsenian pyrite Arsenopyrite XPS Element occurrence |
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