硫砷铊铅矿(PbTlAs_5S_9)在中国的发现和研究  被引量:4

A STUDY ON HUTCHINSONITE (PbTlAs_5S_9) DISCOVERED IN CHINA

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作  者:张宝贵[1] 张忠[1] 龚国洪[1] 王三学[1] 王明再[1] 

机构地区:[1]中国科学院地球化学研究所,贵阳550002

出  处:《矿物学报》1995年第2期138-143,T002,共7页Acta Mineralogica Sinica

摘  要:硫砷铊铝矿(Hutchinsonite)产于云南省南华砷铊共生矿床之中。矿物颗粒微小,多小于5μm,10~50μm占少数。主要共生矿物为雄黄、雌黄、方铝矿和白云石等。赋矿地层为上侏罗统雄黄厂段,主要由白云岩、灰岩、泥岩和粉砂岩组成。硫砷铊铅矿为樱红色至暗红色,条痕樱红色,油脂光泽,性脆,断口贝壳状,反射率绿光(547um)R'α为26.6%,R'γ为23.3%。电子探针7个作品平均化学成分(重量%):Tl(19.57),Pb(19.01),As(34.51),S(25.91),Fe(0.06),Sb(0.03),Hg(0.07),Ag(0.04),Cu(0.01),合计(99.21)。X射线粉晶分析主要谱线(um):0.585(1),0.538(3),0.378(4),0.319(4),0.305(3),0.299(4),0.274(5),0.210(8),0.1810(6),0.1695(3),0.1515(2)。Hutchinsonite occurs in the Nanhua Sn-Tl ore deposit in Yunnan Province. It is fine in grain size, mostly less Tham 5μm and subordinately as large as 10 and 50 μm in size. The major coexist-ing minerals are realgar, orpiment, galena, dolomite, etc. The Xionghuangchang section of the Upper Jurassic series is the principal ore-host strata, composed mainly of dolomite, limestone,mudstone, and siltstone. The physical properies of hutchinsonite are described in the paper. Elec-tron microprobe analyses of seven samples gave: Tl (19. 57 ), Pb (19. 01 ), As (34. 51 ), S(25. 91), Fe (0. 06), Sb (0.03), Hg (0. 07), Ag (0. 04) and Cu (0. 01), totaling (99. 21). The strongest lines in the X-ray diffraction pattern (A) are: 5. 85 (1 ), 5. 38 (3), 3. 78 (4), 3. 19(4), 3. 05 (3), 2. 99 (4), 2. 74 (5), 2. 10 (8), 1. 810 (6), 1. 695 (3) and 1. 515 (2).

关 键 词:硫砷铊铅矿 砷铊共生矿床 雄黄矿床 云南 

分 类 号:P618.7[天文地球—矿床学]

 

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