| 1. | Age determination data indicate episodic crystallization of uranium minerals .
年龄测定数据表明，铀矿物有着不同期的结晶。 |
| 2. | Skeletal age determination in adolescence and the related issues
青少年骨龄鉴定及其相关问题 |
| 3. | Radioactive age determination
放射性定年法 |
| 4. | Absolute age determination
绝对年代测定 |
| 5. | In the forensic pathology , the expression of these biological substances in skin wounds was applied to wound age determination
对于法医病理工作者来说，对这些生物物质变化过程的研究，可以为判定损伤活性及时间提供很好的方法。 |
| 6. | Scales were used for age determination and a modified seine was used for collecting samples to study diversity of fish community . main results were as follows . 1
鱼类年龄结构的研究以鳞片为年龄鉴定材料，鱼类群落多样性的研究以围网为采样工具，主要结果如下： 1 |
| 7. | The research show that the formation of the fault is earlier than these klippen , but it is also a revived reverse fault after the klippen took themselves places from relationship between the fault and klippen , and the esr age determination
据断裂带与飞来峰压覆及切割关系和esr年龄，表明断裂的形成应早于飞来峰的就位，而飞来峰就位后断裂又有过再次的逆冲活动。 |
| 8. | Rb - sr whole rock - minerals ages determination indicates that the isochronal ages are 25018 ma and 213 . 09 . 8 ma for suhaitu and wenduerhao intrusion , respectively . the dated isotopic ages demonstrate that the alxa alkaline - rich intrusive rocks belong to indosinian alkaline magma activity . the similarities and differences of the alkaline - rich intrusive rocks distributed in the alxa fault block and those distributed along the northern margin of the north china block and the tarim block are compared and discussed
采用rb - sr法对阿拉善断块有代表性的苏亥图温都尔浩富碱侵入岩体的年进行了测定，分别获得25018 ma和213 . 09 . 8 ma的年值，提供了属于印支期的年代学证据，认为阿拉善断块北缘富碱侵入岩和华北断块北缘燕辽阴山印支期富碱性侵入岩带应该划归同一印支期富碱性侵入岩带。 |
| 9. | In addition , these sediments also contain reliable high - resolution paleoenvironmental information both with long - timescale and short - timescale . therefore , this area is an ideal one for the research on the paleoceanography and paleoclimate . for the last decade thermoluminescence ( tl ) has been used for a viable tool for age determination of a variety of rock types and sediments
结合已有丰富的岩芯资料和能代表气候变化的氧同位素地层、碳酸岩地层、生物地层、磁化率地层以及粒度、粘土矿物、色谱等资料，详细开展热释光与古气候变化的对比研究。 |
