邛莫金矿床中块硫锑铜矿含硒性及其特征

邛莫金矿床中块硫锑铜矿含硒性及其特征

刘家军1 2，刘建明3，卢文全4，刘显凡1，凌洪飞2，

1. 中国科学院地球化学研究所矿床地球化学开放研究实验室，贵州贵阳 550002；2. 南京大学内生金属矿床成矿机制研究国家重点实验室，江苏南京 210093；3. 中国科学院矿物资源探查研究中心，北京 100101；4. 地质矿产部矿产综合利用研究所，四川成都 610041

收稿日期:2000-06-20 修回日期:2000-06-20 出版日期:2000-06-20 发布日期:2000-06-20

Selenium Concentration and Characteristics of Famatinite from Qiongmo Gold Deposit，Western Qinling Mountains

LIU Jia-jun1 ;2, LIU Jian-ming3, LU Wen-quart4, LIU Xian-fan1, LING Hong-fei2

1. Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002; 2. Key State Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 210093; 3. The Research Center of Mineral Resources Exploration CAS, Beijing, 10010l4; 4 Institute of Complex Utilization of Mineral Resources, Ministry of Geology and Mineral Resources, Chengdu, 610041

Received:2000-06-20 Revised:2000-06-20 Online:2000-06-20 Published:2000-06-20

摘要/Abstract

摘要： 硒的块硫锑铜矿产于西秦岭邛莫金矿床中，与其伴生的矿物有硒汞矿、硒铅矿、硒锑矿、斜方硒镍矿、硒铜镍矿、硒质辉锑矿、自然金以及石英、重晶石等。含硒的块硫锑铜矿平均显微硬度VHN50=247.5kg/mm2，相当于摩氏硬度4.2。电子探针分析结果(w，％)为：Sb 25.79，Cu 38.20，S 21.12，Se 1 2.76，Hg 0.0 0～1.49(平均0.58)，Ag 0.00～0.33(平均0.09)，As 0.00～2.01(平均0.76)。根据成分中S e/(S+Se)比值(原子比)＜0.2抑≥0.2，可将所测矿物划分为含硒质块硫锑铜矿与硒质块硫锑铜矿。它们的化学分子式分别为: (Cu2.84Hg0.01)2.85(Sb1.00A s0.07)1.07(S3.54Se0.46) 4.00和(Cu3.05Hg0.03)3.08(Sb1.07As0.03) 1.10(S2.77Se1.23)4.00。代表性的反射率(％): (470nm) Rγ'=22.84～22.50, Rα'= 27.92～27.99; (550 nm) Rγ'= 22.63～22.76, Rα'=2 7. 79～28.11; (590nm) Rγ'=22.92～22.08, R α'=28.27～28. 72; (650nm) Rγ'=23.08～23.76, Rα'=28.79～29.13。

Abstract: The Qiongmo gold deposit occurs in the Cambrian silicalite and slate in the sou th subzone of western Qinling Mountains. The Se-bearing and selenium famatinite are found in quartz-barite veins in the form of dissemination or veinlets. The associated minerals include tiemannite, clasthalite， antimonselite， kullerudi te， penroseite, selenium stibnite, native gold, barite and quartz. The mineral is lead-gray in colour, brashy, with metallic luster, and 0.01～0.1mm in size. The average microhardness is 247.5kg/mm2 (for 50g load) corresponing to Moh s' hardness=4.2. The reflectance values (SiC standard) are given in 10nm steps. The representative R values are: (470nm), Rγ'=22.84～22.50, Rα'= 27.92～27 .99; (550nm), Rγ'= 22.63～22.76, Rα'=27.79～28.11; (590nm), Rγ'=22. 92～ 22.08, Rα'=28.27～28.72; (650nm), Rγ'=23.08～23.76, Rα'=28.79～29.13. E lectron microprobe analyses of eleven points on famatinite gave the results as f ollows (wt％): Sb, 24.42～28.12 (25.79 in average )； Cu, 36.60～39.94 (38.2 0 in average)；S, 14.49～25.74 (21.12 in average)；Se, 6.11～23.89 (12.76 in average ). Based on Se/(S+Se) ratios of microprobe analyses the mineral is classified as Se-bearing famatinite and selenium famatinite, corresponding to the formula (C u2.84Hg0.01)2.85(Sb1.00As0.07)1.07(S3.54 Se0.46)4.00 and (Cu3.05Hg0.03)3.08(Sb1.07A s0.03)1.10(S2.77Se1.23)4.00 respectively.

刘家军，刘建明，卢文全，刘显凡，凌洪飞， . 邛莫金矿床中块硫锑铜矿含硒性及其特征 [J]. J4.

LIU Jia-jun1 ;2, LIU Jian-ming3, LU Wen-quart4, LIU Xian-fan1, LING Hong-fei2. Selenium Concentration and Characteristics of Famatinite from Qiongmo Gold Deposit，Western Qinling Mountains[J]. J4.