Journal
QUATERNARY GEOCHRONOLOGY
Volume 2, Issue 1-4, Pages 290-295Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.quageo.2006.05.026
Keywords
luminescence dating; palaecoland slide; mongolia; pleistocene
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In an attempt to date a palaeolandslide that took place along the Baga Bogd Massif, in Mongolia, the infrared stimulated luminescence (IRSL) method has been applied to lacustrine silty sediments directly overlying the landslide mass. The IRSL age estimates obtained on alkali feldspar grains (> 40 mu m) and polymineral fine grains (4-11 mu m) provide a minimum age for the landslide event. The IRSL ages on alkali feldspars corrected for long-term fading using the protocol of Mejdahl (1988, 1989) suggest that the palaeolandslide occurred at the beginning of the Last Interglacial. These are in good agreement with the Be-10 cosmogenic dates obtained on faulted and abandoned alluvial fans in the Gobi-Altay mountains. This study demonstrates for the first time that the IRSL dating method can successfully be applied for establishing landslide chronologies. (c) 2006 Elsevier Ltd. All rights reserved.
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