投稿时间：2012-07-01
修订日期：2012-08-30
中文摘要:小热泉子矿床是中-大型富铜、锌(硒)多金属矿床。文章通过电子探针较系统地分析了该矿床不同矿体中的不同容矿岩石的各种硫化物(241件)的微量元素。测定结果表明,该矿床的硫化物明显富硒,硫化物中w(Se)平均为0.045%,S/Se比值平均为829。经初步计算,该矿床硒资源量为813吨,已达大型规模。首次发现硫化物中方铅矿含硒最高,w(Se)最高可达11%,为硒方铅矿;其他硫化物黄铜矿、闪锌矿、铜蓝、黄铁矿中平均w(Se)分别为0.048%、0.041%、0.034%、0.054%;S/Se平均值分别为717、803、955、976。毒砂含硒最低,w(Se)均小于0.001%。不同矿体、不同容矿岩中硫化物的含硒量也有明显差别。Ⅰ号矿床硫化物的硒含量明显高于Ⅲ号矿床,二者硒平均含量分别为0.076%与0.013%,S/Se平均值分别是495和2802。不同容矿岩中凝灰质碎屑岩、绿泥石岩、石英脉中的硫化物w(Se)平均分别是0.056%、0.047%、0.018%;S/Se平均值分别为635、495、2102。这些数据表明该矿床的硫化物形成于较高温度,具岩浆热液作用的特征;Ⅰ、Ⅲ号矿床具不同的成矿环境及成矿多期性的特点,它对该矿床的成因及硒的赋存状态研究具有重要意义。
Abstract:The Xiaorequanzi deposit is a medium-large size copper, zinc (selenium) deposit. In this paper, trace elements of sulfide (241) in different ore bodies and different host rocks have been systematically determined by electron micro probe analysis. As a result, sulfide of the deposit has a high content of selenium, the average value is 0.045%, and the value of S/Se is average 829. After the preliminary calculation, the reserve of selenium in the deposit is 813 t, and has reached a large quantity. Among all kinds of sulfide in the deposit, gelenite contains highest selenium, up to 11%, the high content makes it a clausthalite (which has firstly been found in this deposit). The selenium contents in chalcopyrite, sphalerite, covellite and pyrite are 0.048%, 0.041%, 0.034% and 0.054% respectively, average values of S/Se are 717, 803, 955 and 976. Arsenopyrite contains the lowest selenium, average less than 0.001%. Selenium contents of sulfide in different ore bodies or host rocks have significant differences as well. The selenium contents of sulfide in ore body No.Ⅰ is much higher than ore body No.Ⅲ, the average values are 0.076% and 0.013% respectively, and S/Se average as 495 and 2802. Average selenium contents of sulfide in tuffaceous clastic rock, chlorite rock and quartz vein are 0.056%, 0.047% and 0.018%; average S/Se values are 635, 804 and 2102. These results suggest that sulfide of the deposit is formed at higher temperature and possess a feature of magmatic hydrothermalism. Ore body No.Ⅰ and No.Ⅲ have characteristics of different metallogenic environments and mineralization periods, which is of great significance for studying the ore genesis and selenium occurrence of the deposit.
keywords:geochemistry sulfide S/Se ratio electron microprobe analysis Xiaorequanzi copper zinc (selenium) deposit Xinjing
文章编号：
中图分类号：P618.41;P618,43;P618.76
文献标志码：
基金项目:本文为中央级公益性科研院所基本科研业务费专项资金(编号为K1002及K1104),国家自然科学基金青年基金(编号为41003020)和地质调查项目(编号: 1212011085060)联合资助的成果
引用文本：
刘敏,陈文明,洪为,蒋宗胜,姚富贵,武承贺.2012.新疆东天山小热泉子铜锌(硒)矿床硒的赋存状态及硫硒比值研究[J].矿床地质,31(5):1101~1110LIU Min,CHEN WenMing,HONG Wei,JIANG ZongSheng,YAO FuGui,WU ChengHe.2012.Occurrence states of Se and S/Se ratios study of Xiaorequanzi copper, zinc (selenium) deposit in East Tianshan, Xinjiang[J].Mineral Deposits31(5):1101~1110
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