关键词: 胶东, 望儿山金矿, 石英, 热释光, 晶胞参数

Abstract: Gold mineralization of the Wangershan deposit can be divided into 4 stages including pyritequartz stage, quartzpyrite stage, polymetallic sulfide stage and quartzcarbonate stage. The thermoluminesence and cell parameters of quartz from the 4 stages were analyzed in this paper.The characteristics of the thermoluminesence curves show obvious single peak at middle temperatures for the quartz from the early and later stages and asymmetric twin peaks with strongest emitting intensity and complexity for the quartz from the main mineralization stage. It is an important prospecting criteria for gold in this area. At the depth of the veinⅢ, the thermoluminesence curves of the quartz appear to have shoulderlike and twin peaks, implying a good mineralization prospect downwards. The cell parameters of the quartz show a regular variation in time and space. In the main mineralization stage, the quartz cell parameters a0, c0 and v0 are relatively large with (Δa0/a0)/(Δc0/c0) ranging from 165 to 440, suggesting that trace elements are combined into quartz by gap filling and replacement with interstitial mode as the major way. The change of halfpeak bandwidth of the thermoluminesence is as the same as the cell parameters for quartz; therefore,the halfpeak bandwidth can also be taken as a criteria for goldrich and goldpoor quartz grains. According to the spatial variation tendency of the cell parameters and halfpeak bandwidth of quartz, the authors infer that the unmined region at large depth is presumably profitable for further gold mineralization prospect.

Key words: Jiaodong Peninsula, Wangershan gold deposit;, quartz, thermoluminesence, cell parameter