CAJ | 학술논문

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.
양산금광시서진령지구신발현적초대형금광.재금광물중원소적부존상태시인식성광궤리、평개광상채선야과정대배경영향적중요의거.작자운용XPS기술측정료재금광물함신황철광화독사신선단렬면적As3d、Fe2p급S2p적존재형식화상대원자백분함량.결과표명,재함신황철광표면,초과50%적As이As~(-1)형식존재,약18%～20%적As이As~(3+)형식존재,약30%적As이As~(5+)형식존재.재독사표면,초과60%적As이As~(1-)형식존재,약30%적As~(3+)형식존재,기여10%적As주요이As~(3+)형식존재.분석증명As、Fe、S등원소재함신황철광화독사중주요이As`(1-)、Fe~(2+)、S~(1-)형식존재외,As원소가능환이As~(3+)형식존재우함신황철광급독사결구중.
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+).