海洋地质与第四纪地质2012，Vol.32Issue(1)：85-91,7.DOI:10.3724/SP.J.1140.2012.01085
稻城冰帽库照日冰碛垄的宇生核素10Be年代测定
COSMOGENIC ISOTOPE 10Be DATING FOR KUZHAORI MORAINE IN DAOCHENG ICE CAP
摘要
Abstract
The Daocheng Ice Cap which is on the southeast of Shaluli Moutain had appeared as a large-scale glacier in Quaternary. Howevrer, there are. few dating data available in the study area. In this article, we chosed three samples form the Kuzhaori moraine in the southern margin of Daocheng Ice Cap and used Cos-mogenic Isotope 10Be exposure dating methord to date the exposure age of the moraines. It is found that: (1) the exposure time of the oldest moraine at Kuzhaori is 714 ±8. 0～529±8. 0 kaBP. The exposure age of D moraine is 121 ±2. 9～114 ±2. 9 kaBP. and the exposure age of DC moraine is 47 ± 1. 3～43±1. 3 kaBP. Exposure ages give an estimate of the timing of initial glacier retreat, so we can deduce that E moraine, D moraine and DC moraine are the results of glacier advance in MIS 16、MIS 6 and MIS 3b, according to the climate changes deduced from deep-sea oxygen isotope isotopic records and other dating data. (2) The retreat of glacier is a gradual process. We double-Checked the dating data of sample E. It shows that the cosmogenic isotopes dating technique is an effective method in dating moraine samples.关键词
宇生核素/稻城冰帽/第四纪/冰碛垄/10BeKey words
cosmogenic radionuclide/ QuarternaryQuaternary/ moraine/ 10Be/ Daocheng Ice Cap分类
天文与地球科学引用本文复制引用
张志刚,王建,徐孝彬,赵志军,白世彪..稻城冰帽库照日冰碛垄的宇生核素10Be年代测定[J].海洋地质与第四纪地质,2012,32(1):85-91,7.基金项目
国家自然科学基金项目(40572097) （40572097）
江苏省优势学科项目 （）
