热发光在湘西金矿外围找矿评价中的应用  

APPLICATION OF THERMOLUMINESCENCE SPCTROSCOPY TO GOLD EXPLORATION AND EVALUATION IN THE OUTSKIRTS OF XIANGXI GOLD DEPOSIT

作　　者：陈梦熊[1] 张振儒[2] 陈蓉美 

机构地区：[1]中国有色金属工业总公司北京矿产地质研究所,100012 [2]中南工业大学地质系,长沙410083

出　　处：《矿产与地质》1992年第3期201-207,共7页Mineral Resources and Geology

摘　　要：湘西金矿及外围的层间脉石英热发光光谱线(TL)的研究表明,富金石英的TL谱图多为单峰,而贫金或不含金石英的为双峰;含金石英的主峰位的温度Tmax为264～342℃,而含金性差的石英Tmax为254～263℃;石英主峰位热发光强度(I)和总强度(I_总)与含金量呈正相关,随着含金量增加而增大;含金石英热发光的陷阱深度E值较大,为1.9459×10^(-20)～1.9885×10^(20)J,贫金或不含金石英的E值为1.2128×10^(-20)～1.5211×10^(-20)J。含金石英捕获中心频率S_0值较大,为3.9874～4.2113S^(-1),而贫金或不含金石英的S_0值较小,为0.3915～1.8093S^(-1)。据此,对比金矿区及外围工作区石英的热发光光谱特性,指导评价矿区外围区段,提出了唐家溪、徐家院为具找金远景的区段。The Thermoluminescence Spectroscopy (TL)study of interlayer vein quartz in the mining area and its outskirtsof Xiangxi Gold Deposit shows the differences in peak number of TL spectra with single for gold rich quartz and double for gold poor one,temperature (Tmax)of main peak being 264-342℃ for gold rich quartz and 254-263cccccccccccfor gold poor one,thermoluminenscent density ( I 1)and ∑I being positively correlated to gold content ,trap depth (E) being 1. 945×110-20-1. 9885×10-20J for gold bearing quartz and 1. 2128 × 10-20-1. 5211 × 10-20J for gold poor or unbearing one ,and frequency coefficient (S0)in spectra of thermo-luminescence among gold-bearing quartx being 3. 974 - 4. 2113S-1,gold poor quartz and gold-unbearing one being 0. 3915 - 1. 8093S-1. According to the result we got , it is concluded that the characteristics of TL on quartz can be used as a guide to explore for gold and evaluate gold deposit in the mining area and its outskirts of Xiangxi Gold Deposit ;and the prospective regions of Tangjiaxi and Xujiayuan were pointed out .

关 键 词：热发光光谱 金矿 找矿 评价 

分 类 号：P618.510.8[天文地球—矿床学]