湖南沃溪 Au-Sb-W 矿床中黑钨矿族矿物特征及其对矿床成因的指示

J4 ›› 2014, Vol. 20 ›› Issue (2): 213-.

湖南沃溪 Au-Sb-W 矿床中黑钨矿族矿物特征及其对矿床成因的指示

陈爱清,唐攀科,李国武,邢万里

发布日期:2014-07-19

Characteristics of the Wolframite Mineral Series and Implications for Metallogeny of the Woxi Au-Sb-W Deposit in Hunan Province

CHEN Aiqing,TANG Panke,LI Guowu,XING Wangli

Published:2014-07-19

摘要/Abstract

摘要：

通过对湖南沃溪 Au-Sb-W 矿床鱼儿山—红岩溪矿段中黑钨矿族矿物的野外观察表明,含黑钨矿族矿物的矿石主要呈条带状、细脉状,次为浸染状构造,结构上主要为半自形-它形板状和柱状;X 射线粉晶衍射结果得出其物相为钨铁矿,晶胞参数为a0:4.7454Ao ,b0:5.7160Ao ,c0:4.9753Ao ,β:90°13′;电子探针分析结果显示,MnO含量范围0.97%~11%,FeO含量范围 13.65%~23.36%,WO3 含量范围 71.39%~76.87%,既有高 MnO 含量亦有低 MnO 含量的钨铁矿,成连续性变化,并从深部中段向浅部中段,MnO 含量具有增大趋势。计算其晶体化学式为(Fe0.57~1.02Mn0.46~0.04)W0.98~1.00O4。相关分析得出 FeO 与 MnO 相关系数为-0.98,WO3 与 MnO 相关系数为 0.47,WO3 与 FeO 相关系数为-4.10。黑钨矿族矿物中 Nb 和 Ta 的含量较低,暗示了沃溪 Au-Sb-W 矿床可能为沉积-改造热液成因。

关键词: 沃溪 Au-Sb-W 矿床;钨铁矿;黑钨矿族;矿床成因

Abstract:

Through field observations in the Yu er shan and Hong yan xi ore section of the Woxi Au-Sb-W deposit in Hunan Province, we find that the ore structure of wolframite series occurs mainly as bands and veinlet, and is disseminated in less abundance. The texture is mainly subhedral-allotriomorphic lath. The results of x ray diffraction show that their phases are ferberite and their cell parameters are a0: 4.7454Ao , b0: 5.7160Ao , c0: 4.9753Ao , β: 90°13′. The results of EPMA show that the content of MnO is in the range of 0.97%~11%, with FeO in the range of 13.65%~23.36% and WO3 in the range of 71.39%~76.87%, including both high content and low content of MnO that varies continuously. From the deep to the shallow ore section, the content of MnO increases and forms the “reverse zone”. Crystalline formula is calculated to be (Fe0.57~1.02Mn0.46~0.04 ) W0.98~1.00O4. Correlation analysis of FeO and MnO shows that the correlation coefficient is -0.98; WO3 and MnO correlation 0.47; WO3 and FeO correlation coefficient is -4.10. The content of Nb and Ta of wolframite mineral series is low, suggesting possible sedimentary reworked hydrothermal genesis of the Woxi Au-Sb-W deposit.

Key words: the Woxi Au-Sb-W deposit;ferberite;wolframite series;metallogeny

陈爱清,唐攀科,李国武,邢万里. 湖南沃溪 Au-Sb-W 矿床中黑钨矿族矿物特征及其对矿床成因的指示[J]. J4, 2014, 20(2): 213-.

CHEN Aiqing,TANG Panke,LI Guowu,XING Wangli. Characteristics of the Wolframite Mineral Series and Implications for Metallogeny of the Woxi Au-Sb-W Deposit in Hunan Province[J]. J4, 2014, 20(2): 213-.