COSMOGENIC ISOTOPE 10Be DATING FOR KUZHAORI MORAINE IN DAOCHENG ICE CAP

ZHANG Zhigang; WANG Jian; XU Xiaobin; ZHAO Zhijun; BAI Shibiao

doi:10.3724/SP.J.1140.2012.01085

2012 Vol. 32, No. 1

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Article navigation > Marine Geology & Quaternary Geology > 2012 > 32(1): 85-91

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ZHANG Zhigang, WANG Jian, XU Xiaobin, ZHAO Zhijun, BAI Shibiao. COSMOGENIC ISOTOPE 10Be DATING FOR KUZHAORI MORAINE IN DAOCHENG ICE CAP[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 85-91. doi: 10.3724/SP.J.1140.2012.01085

Citation:

ZHANG Zhigang, WANG Jian, XU Xiaobin, ZHAO Zhijun, BAI Shibiao. COSMOGENIC ISOTOPE 10Be DATING FOR KUZHAORI MORAINE IN DAOCHENG ICE CAP[J]. Marine Geology & Quaternary Geology, 2012, 32(1): 85-91. doi: 10.3724/SP.J.1140.2012.01085

COSMOGENIC ISOTOPE 10Be DATING FOR KUZHAORI MORAINE IN DAOCHENG ICE CAP

1 School of Geography Science, Nanjing Normal University, Nanjing 210046;
2 Key Laboratory of Virtual Geographical Enviroment, Nanjing Normal University, Nanjing 210046;
3 Jiangsu College of Education, Nanjing 210024

Received Date: 10 August 2011

Revised Date: 10 September 2011

Abstract

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 Cosmogenic 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.
- cosmogenic radionuclide /
- QuarternaryQuaternary /
- moraine /
- ¹⁰Be /
- Daocheng Ice Cap

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References

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