Comparative study on spatial differences in the development of red weathering crust in the southern Liaoning region
The surface morphology characteristics of quartz particles are widely used in the reconstruc-tion of ancient climate and environment.This article is based on field investigations and focuses on sections of the red weathering crust in Lashufang and Qidingshan in the southern Liaoning region.The surface chemical characteristics of quartz particles are observed using scanning electron micros-copy,and the chemical action function is cited to conduct quantitative research on the basis of quali-tative description.Further clarify the climate differences between the two red weathering crusts dur-ing the same development period.The results show that both the Lashufang and Qidingshan profiles are dominated by high-energy chemical environments and are in the stage of moderate chemical weathering.The development environment is warm and humid climate conditions.Among them,the climate in the Lashufang profile fluctuates greatly during the development of the red weathering crust,while the Qidingshan profile is relatively stable.The development degree of dissolution and precipitation characteristics at a distance of 120,80,and 40 cm from the bedrock generally shows a decreasing trend.Analysis of chemical activity,environmental particle percentage,and chemical al-teration index shows good synchronicity among the three,which is in line with the theory of weathe-ring crust development.
red weathering crustquartz particle surface morphologyscanning electron microscopedevelopmental difference
万方数据
维普
