邛莫金矿床中的灰硒汞矿  

TIEMANNITE FROM A MICRO-DISSEMINATED GOLD DEPOSIT IN QIONGMO

作　　者：刘家军[1] 郑明华[1] 刘建明[1] 卢文全 

机构地区：[1]成都理工学院资源与经济系,地矿部矿产综合利用研究所

出　　处：《成都理工学院学报》1996年第2期21-28,共8页Journal of Chengdu University of Technology

摘　　要：灰硒汞矿是一种少见的矿物。该文叙述的灰硒汞矿产于西秦岭南亚带邛莫微细浸染型金矿床中。与其共生的矿物有自然金、灰硒铅矿、硒锑矿、硒镍矿、硒－辉锑矿、硒－块硫锑铜矿、硒－辉砷镍矿等。该矿物呈铅灰色，金属光泽，粒度０．０１～０．０５ｍｍ，显微硬度ＶＨＮ５０＝３２～５５ｋｇ／ｍｍ２。该矿物含：Ｈｇ６７．０６％～７７．２０％，Ｓｅ１７．７３％～３３．０１％，Ｓ０．４４％～５．１８％，计算的分子式为Ｈｇ０．８３４９（Ｓｅ０．８７３３８Ｓ０．１２６２）１．００００，简式为ＨｇＳｅ。Ｘ射线粉晶分析最强的线是０．３４９５ｎｍ（１０，１１１）、０．２１４２ｎｍ（８，２２０）和０．１８２６ｎｍ（８，３１１）。据此得该矿物的晶胞参数α＝０．６０７９４ｎｍ。Tiemannite has been discovered in the Qiongmo micro-disseminated gold deposit occuring in the Cambrian silicalite and slate in the southern subzone of the Western Qinling Mountains. Samples containing tiemannite were collected from silicalite ore. Tiemannite is found in stibnite-quartz-barite veins in the forms of dissemination or veinlet. The associated minerals include native gold, clausthalite, antimonselite, Trustedtite, Se-famatinite, Se-garsdorffite, Sestibnite, quartz, barite and what not. The mineral is lead-gray in colour,metallic in lustur and brashy, 0. 01～0. 05mm in size, 32～55kg/mm2 (for 50g load ) in microhardness and Mob s=2. 5.The reflectance values(SiC standard) are given in 10nm steps, The representative R values are 450nm 30. 62～34. 59, 500nm 28. 9～34. 18, 550nm 26. 45～32. 55, 600nm 24. 96～30. 19,650nm 24. 78～28. 09 and 700nm 24. 09～27. 75, Electron microprobe analyses of thirty-six points gave the results as follows (% ): Hg 67. 06～77. 20 (69. 56 on average), Se 17. 73～33.of (28. 66 on average) and S 0. 44～5. 18 (1. 68 on average), leading to the formula Hg0.8349 (Se0.8738, S0.1262) 1. 0000, and its simplified formula HgSe or Hg (Se, S). The strongest lines in the X-ray diffraction pattern are 0. 3495 (10, 111), 0. 2142 (8, 220) and 0. 1826 (8, 311 ). The cell dimension calculated from the powder pattern is a=0. 60794 nm.

关 键 词：金矿床 汞矿 灰硒汞矿 

分 类 号：P618.510.4[天文地球—矿床学]