广东陆丰硫铁矿床中黝铜矿系列矿物的发现及其研究

DISCOVERY OF A SERISE OF TETRAHEDRITE MINERALS FROM LUFENG PYRITE DEPOSIT IN GUANGDONG

广东陆丰发现黝铜矿族系列矿物。根据矿物硬度、反射率、Ｘ衍射和电子探针分析数据，鉴定其为黝铜矿、砷黝铜矿、锌锑黝铜矿、锌砷黝铜矿、铋砷黝铜矿和碲砷黝铜矿。研究表明，在陆丰矿床中发现如此多黝铜矿亚种以及Ｆｅ、Ｚｎ、Ａｓ、Ｓｂ、Ｂｉ和Ｔｅ分别呈全完类质同象系列是极为罕见的。通过黝铜矿系列的研究。

In the course of investigation into the Lufeng pyrite deposit in Guangdong, a serise of tetrahedrite minerals was firstly discovered, including tetrahedrite,tennantite,(Zn,Sb)tetrahedrite, (Zn,As)tetrahedrite,(Bi,As) tetrahedrite and (Sb,As)tetrahedrite, following the comprehensive analysis of their hardnesses, reflectances, X ray spectrum patterns, element plane distributions and microprobe data.Studies shows that the elements of the tetrahedrite group such as Fe, Zn, As, Sb, Bi and Te formed separately into the varieties or subspecies of the group in a way of perfect isomorphism. The above sex tetrahedrite minerals consist respectively of 8.75 11.97% As and 18.12 20.7% Sb; 22.9% As, 6.00% Sb and 0.96% Zn; 0.00%As, 28.10% Sb and 6.67% Zn; 8.78 10.75% As, 12.36 14.59% Sb and 6.28 8.19% Zn;10.6 15.58% As, 0.19 1.22% Sb and 15.49 20.27% Bi; 9.40 10.35% As, 3.52 3.64%Sb and 17.64 18.93 Te. The change in the composition of the tetrahedrite group is accompanied by the transformation of the geochemical types of the related deposits, an interconnection that may be applied to analysing mineralizational mechanism so as to direct prospection of deposits. Eexperimental application of this mineralogical indicators to serching for rare or dispersed element bearing deposits in the study area has obtained better results.