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[ACC26-05] Mineral composition of dust layers in a shallow ice core drilled in Pamir Alay Mountains of Central Asia
Keywords:Glacier, Ice core, Dust, Colored mineral, Mineral composition, Pamir
The depth profiles of dust differed between small size (1<d≦15 μm) and large size (d> 15 μm). The dust layers consisting mainly of small size dust contained abundant yellow colored minerals, while those with large size dust contained more abundant red colored minerals. Furthermore, the dust layers of large size dust contained calcite originating from limestone, which is an unique geology of Pamir region, indicating they are originate from near the glacier. Results revealed that the mereological type and composition differed significantly among the dust layers of the ice core. In particular, they are possibly originated from two different sources, including a short distance consisting of calcite and red mineral, and a long-distance without them.