AGE OF ANTARCTIC METEORITES AND ICE 11; K. Nishiizumi, D. Elmore*
The polar ice sheet contains environmental records of the past, such as ancient air, climatic records, C02 cycle, cosmic ray records and so on. There was almost no relationship between meteorite study and glaciology until the discovery of Antarctic meteorites. Even though direct measurement of the a...
| Main Authors: | , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.217.6948 http://www.lpi.usra.edu/meetings/lpsc1986/pdf/1316.pdf |
| Summary: | The polar ice sheet contains environmental records of the past, such as ancient air, climatic records, C02 cycle, cosmic ray records and so on. There was almost no relationship between meteorite study and glaciology until the discovery of Antarctic meteorites. Even though direct measurement of the age of old ice sheet was not possible, the terrestrial age of meteorites provides some relevent age data. Recently, two new dating methods were demonstrated [1,2]. These are dating for old ice and in-situ 10~e-26~1 in terrestrial quartz for surface exposure. In this study, we combine the terrestrial age of meteorites and the age of surrounding ice for understanding the history of the Antarctic ice sheet and the meteorite accumulation mechanism. We report here measurements of the costnogenic nuclides 36~1 (tk = 3.0~10~ 3ears) and lO~e (1.6~10 6 years) in Antarctic meteorites, ice and snow, and 3Mn (3.7~10 ~ years) in meteorites. The 36~1 measurement was carried out by accelerator mass spectrometry (AMS) using the University of Rochester MP |
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