The Process and Mechanisms of Freezing and Thawing Deterioration of Petroglyphs under Snowmelt and Rainfall Infiltration
Source abstract
Abstract
Freeze–thaw cycles under the conditions of snowmelt and rainfall infiltration in winter are triggers for petroglyph weathering. Rock samples from the Helan Mountains were subjected freeze–thaw cycles under various conditions in laboratory testing, and the mass, elastic wave velocity and unconfined compressive strength were tested. The results show that the mass loss rate, wave velocity and compressive strength decreased. In addition, according to XRD analyses, the content of calcite and feldspar in the samples decreased, and according to SEM analyses, the microscopic pores grew. Considering the mass, mineral content and micro-voids, the variation decreases in the order: snowmelt group, rainfall infiltration group, normal freeze–thaw group. However, for wave velocity and compressive strength, the opposite results were observed. This research contributes to a better understanding of the weathering processes and mechanisms of petroglyphs in the Helan Mountains in winter.
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Research context
OpenAlex topics: Climate change and permafrost · Methane Hydrates and Related Phenomena · Hydrocarbon exploration and reservoir analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Department of Geotechnical Engineering, Lanzhou University of Technology, 287 Langongping Road, Lanzhou 730050, China
Funding
National Natural Science Foundation of China · Program for Changjiang Scholars and Innovative Research Team at the University of the Ministry of Education of China · National Natural Science Foundation of Gansu · “Hongliu Excellent Young” Talents Support Program of Lanzhou University of Technology
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