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位于青藏高原东南缘的玉龙雪山分布有欧亚大陆纬度最低的海洋型冰川,其主峰及周边地区保存了大量清晰完整的第四纪冰川遗迹.研究该区第四纪冰川作用遗迹及其冰川作用史,具有重要的理论与实际价值.应用光释光(OSL)测年技术对玉龙雪山冰川沉积物进行了定年,结合前人研究资料,重建玉龙雪山冰川作用史.研究结果表明:玉龙雪山东麓的末次冰期冰碛物主要形成于晚更新世末次冰期最盛时期,其平均年代约在25 ka,西麓末次冰期冰碛物形成年代约为50 ka,对应于深海氧同位素3阶段中期(MIS 3b).而倒数第二次冰期的年代在240 ka左右,处于中更新世晚期,对应于MIS 8阶段,当时玉龙雪山存在多条复式山谷冰川.该研究可为玉龙雪山第四纪冰川作用历史的重新认识以及光释光测年技术在该区的应用提供基础资料.
Jade Dragon Snow Mountain located in the southeastern margin of the Qinghai-Tibet Plateau has the lowest latitudinal oceanic glaciers in Eurasia, and a large number of clear and complete Quaternary glacial relics are preserved in the main peak and the surrounding area. History, has important theoretical and practical value.Using optical dating (OSL) dating technique to date the Yulong Snow Mountain glacial sediments, combining the previous research data to reconstruct the history of the Jade Dragon Snow Mountain glacier.The results show that: The last glacial moraine was mainly formed during the last glacial period of Late Pleistocene, with an average age of about 25 ka. The age of the last glacial moraine was about 50 ka in the western foothills, corresponding to the mid-third stage of deep-sea oxygen isotopes (MIS 3b ), While the penultimate glacial age was around 240 ka, which occurred in the late Middle Pleistocene corresponding to the MIS 8 stage when there were multiple double glaciers in the Jade Dragon Snow Mountain.The study could be the history of the Jade Dragon Snow Mountain’s Quaternary glacial action Re-understanding and photoluminescence dating techniques in the area to provide basic information.