The alkali fusion combined with ICPMS was used in thi s study to determine the Re-Os ages of molybdenite in the Zhongjia tin poly metallic deposit.
本文使用碱熔法和ICPMS技术对中甲锡多金属矿床辉钼矿Re Os同位素年龄进行测定,结果表明,中甲锡多金属矿床矿化模式年龄为193～196Ma,属燕山早期早阶段成矿,和成矿有关的黑云母花岗岩则形成于晚印支期—早燕山期。
Objective To study the appearance rate of special anatomy of the ostoimestal complex:Haller Cells(HC),aerated middle turbinate(AMT),paradoxical middle turbinate(PMT) and uncinate process pneumatization(UPP) between the healthy and the chronic sinusitis groups by spiral CT with thin-slice,high-resolution scanning and multiplanar reconstruction technique.
目的运用薄层螺旋CT的高分辨扫描和多平面重建技术对健康人群和慢性鼻窦炎人群鼻道窦口复合体引流通道中的特殊解剖变异:Haller气房,泡性中甲、中甲反向弯曲、钩突气化的出现率进行研究。
Research on Performance of Standard Gas of Methane in Air for Greenhouse Measurement;
温室监测用空气中甲烷标准气体的性能研究