CAJ | 학술논문

通过对区内505和530等主要矿脉石英红外吸收光谱、热爆裂及热发光特征的系统研究，总结了该区无矿、贫矿及矿体石英脉评价的石英矿物学标志，表现为：①无矿石英起爆温度为210～330℃，热爆裂曲线无明显峰型；石英热发光总强度大于20 000 cps，峰值强度大于500 cps；②贫金石英脉其石英红外吸收相对光密度DCO2/DH2O值大于1.1；起爆温度为210～280℃，石英热爆裂曲线为明显单峰形态，主爆峰对应温度值为420～440℃；石英热发光总强度介于10 000～20 000 cps之间，峰值强度介于150～300 cps之间；③矿体石英脉其石英红外吸收相对光密度DCO2/DH2O值小于1.0；起爆温度100～160℃，热爆曲线为单峰型，主爆峰对应温度为140～180℃；石英热发光总强度值小于10 000 cps，峰值强度小于150 cps。根据本区含金矿脉矿化理想分带模式及石英红外吸收光谱、热爆裂及热发光参数系统变化规律，建立了该区石英脉型金矿床找矿评价的石英矿物学标志模型。
통과대구내505화530등주요광맥석영홍외흡수광보、열폭렬급열발광특정적계통연구，총결료해구무광、빈광급광체석영맥평개적석영광물학표지，표현위：①무광석영기폭온도위210～330℃，열폭렬곡선무명현봉형；석영열발광총강도대우20 000 cps，봉치강도대우500 cps；②빈금석영맥기석영홍외흡수상대광밀도DCO2/DH2O치대우1.1；기폭온도위210～280℃，석영열폭렬곡선위명현단봉형태，주폭봉대응온도치위420～440℃；석영열발광총강도개우10 000～20 000 cps지간，봉치강도개우150～300 cps지간；③광체석영맥기석영홍외흡수상대광밀도DCO2/DH2O치소우1.0；기폭온도100～160℃，열폭곡선위단봉형，주폭봉대응온도위140～180℃；석영열발광총강도치소우10 000 cps，봉치강도소우150 cps。근거본구함금광맥광화이상분대모식급석영홍외흡수광보、열폭렬급열발광삼수계통변화규률，건립료해구석영맥형금광상조광평개적석영광물학표지모형。
By systematic studies on infrared absorption spectrum, thermal decrepitation and thermoluminescence of the main gangue mineral quartz collected from vein No.505 and No.530 major ore veins in the Xiaoqinling region, the mineralogical marks of quartz for evaluation of barren, gold-poor and orebody quartz veins were summarized. It can be concluded: (1) For the barren quartz veins, their starting thermal decrepitation temperatures are between 210℃ and 330℃ and thermal decrepitation curves show no obvious peak values, their total thermoluminescent intensity is above 20 000 cps and thermoluminescent peak strength value is above 500 cps. (2) For the gold-poor quartz veins, their relatively light density DCO2/DH2O values calculated from the infrared absorption spectra of quartz are above 1.1, their starting thermal decrepitation temperatures range from 210℃ to 280℃ while their thermal decrepitation curves are obviously unimodal in shape, with the peak decrepitation temperature being about 420～440℃, their total thermoluminescent intensities lie between 10 000 cps and 20 000 cps and thermoluminescent peak strength values are between 150 cps and 300 cps. (3) For the orebody quartz veins, their relatively light density DCO2/DH2O values calculated from the infrared absorption spectra of quartz are lower than 1.0, their starting thermal decrepitation temperatures range from 110℃ to 160℃ and the thermal decrepitation curves are also unimodal in shape with the correspondingly peak decrepitation temperatures ranging from 140℃ to 160℃, their total thermoluminescent intensity is usually lower than 10 000 cps and thermoluminescent peak strength values lower than 150 cps. According to the ideal mineralization zoning model and systematic variation regularities of infrared absorption spectra, thermal decreptitation and thermoluminescent parameters of quartz, the mineralogical mark model of quartz for exploration and evaluation of the quartz vein-type gold deposits in this region have been established.