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在青藏高原东部硬普沟采集6个冰川沉积光释光测年样品(2个现代样、3个新冰期和1个末次冰期样品),运用SAR结合SGC技术,采用石英大测片、小测片BSL以及多矿物IRSL等3种方法进行了等效剂量(De)的测试,SAR和SGC技术测得的De值相近。3种方法的测试结果表明,De值IRSL>大测片BSL>小测片BSL。多矿物IRSL测得的De值比石英BSL偏高,表明长石比石英较难晒退,不适于该地冰川沉积测年。石英大测片适于晒退较好的样品。该地石英的释光敏感性较低,小测片的测试情况不理想,且不能完全区分不同晒退程度的颗粒。对于年代较老的、较明亮的冰川沉积样品,石英小测片甚至单颗粒技术可能是可行的。今后需要更多研究如何应对释光敏感性低的样品的测试问题。
Six glacial sedimentary photosemisitic dating samples (two modern samples, three new glacials and one last glacial sample) were collected in the eastern part of the Qinghai-Tibet Plateau. Using SAR combined with SGC technique, BSL and multi-mineral IRSL three methods were equivalent dose (De) test, SAR and SGC technology De values ?? are similar. The results of the three methods show that the De IRSL> large test BSL> small test BSL. The De value of multi-mineral IRSL is higher than that of quartz BSL, indicating that feldspar is harder to sunburn than quartz and not suitable for the glacial sediment dating. Quartz large test piece suitable for drying back better samples. Quartz luminescence sensitivity of the lower, small test results are not satisfactory, and can not completely distinguish the degree of sunburn degree of particles. For older, brighter glacial sediment samples, quartz microlithography and even single particle technology may be viable. In the future, more research is needed on how to deal with the problem of testing samples with low photosensitivity.