Micromorphology of Ice Dust in the Glacier Area of Yulong Snow Mountain
Received date: 2025-01-29
Revised date: 2025-04-15
Online published: 2025-07-03
Supported by
the Second Qinghai Tibet Plateau Scientific Investigation Program(2019QZKK0605);The Youth Innovation Promotion Association of the Chinese Academy of Sciences(2021429)
The study of the physical, chemical, and micromorphological characteristics of ice dust in the Yulong Snow Mountain glacier area reveals the formation mechanisms, sources, and influencing factors of ice dust in the region, providing a scientific basis for understanding glacier melting processes. Using ice dust samples collected from the melting ice surface in the glacier area between August and September 2023, the physical and chemical properties and formation mechanisms of ice dust were analyzed, and the potential effects of ice dust on glacier melting and the carbon cycle were discussed. Particle size analysis, total organic carbon measurement, and micromorphological examination of the samples revealed that the mode of mineral particle size distribution in ice dust ranged from 2 to 28 μm. The distribution structure was relatively simple, primarily due to dust deposition and local rock weathering. The total organic carbon content in ice dust from snow and ice samples was relatively high and increased with decreasing altitude (sampling point elevations ranged from 4 700 to 4 500 m). This suggests that strong glacier melting in summer substantially influences transport and spatial distribution of dissolved organic matter. Microscopic morphology of the ice dust was mainly a dense argillaceous structure, with distinct appearances of both inorganic and organic substances. The internal structure exhibited uneven and complex pores, with a high fractal dimension ranging from 1.600 8 to 1.845 6. Energy-dispersive spectroscopy detected abundant elements such as C, Si, O, and Al, indicating that the ice dust contains carbonates, silicates, organic matter, and other substances closely related to glacier melting. This study supports comparative analysis with other glacier-related research and provides guidance for future investigations into the physical and chemical characteristics and micromorphology of ice dust from other glaciers. Future in-depth studies will focus on determining mineral types and conducting quantitative elemental analysis of ice dust in the Yulong Snow Mountain glacier area, with an expanded sampling range and quantity.
Weizhong ZHANG , Hewen NIU , Aijun BU . Micromorphology of Ice Dust in the Glacier Area of Yulong Snow Mountain[J]. Advances in Earth Science, 2025 , 40(5) : 540 -550 . DOI: 10.11867/j.issn.1001-8166.2025.033
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