302铀矿床石英萤石和方解石的热释光的垂直分带

VERTICAL ZONING OF THE THERMOLUMINESCENCE OF QUARTZS, FLUORITES AND CALCITES IN URANIUM DEPOSIT No. 302

302铀矿床是一个大型的隐伏花岗岩型铀矿床。矿床不同垂深部位产出的石英、萤石和方解石的矿物热释光研究结果表明,这些矿物的人工热释光(ATL)性质在矿床垂向上有明显的反映。矿床上部的石英的ATL发光曲线上只有一个单峰,而矿床下部则可出现有2—3个峰。矿床上部的石英、萤石和方解石的ATL发光强度相对较小,陷阱类型较少,陷阱深度较浅,而矿床下部的情况刚好相反。石英、萤石和方解石的人工热释光性质可以作为划分铀矿床垂直分带的良好标志。

Uranium deposit No. 302 is s large blind granitic one . The study of thermoluminescence of quartzs,fluorites and calcites shows that the ATL of them has a great difference in the vertical direction of the deposit . There is only one single peak on the ATL glow curve of the quartzs samples from the upper part of the deposit,but there are 2—3 peaks on the ATL glow curve of the quartzs samples from the lower part of the deposit. with it's smaller ATL power, less trap types and shallower trap depth,ATL of the quartxs,fluorites and calcites in the upper part of the deposit is different from that in the lower part of the deposit. Therefore, the ATL of these minerals can be used as the indicators to study vertical zoning of the blind uranium deposit.