Petrographic Characteristics of Paleosols in Upper Daheyan Low-Order Cycle, Southern Bogda Mountains, Northwestern China
Department
Geosciences and Geological and Petroleum Engineering
Major
Geology and Geophysics
Research Advisor
Yang, Wan
Advisor's Department
Geosciences and Geological and Petroleum Engineering
Funding Source
S&T Undergraduate Research Office; Dr. Alfred Spreng Research Award
Abstract
This research is petrographic characteristics study of paleosols in the upper Daheyan Low-order cycle, Taodonggou section, Southern Bogda Mountains, Northwestern China. Paleosols and calcitic nodules within the paleosols are petrographic studied to interpret paleoenvironment and paleoclimate during pedogenesis. 400 point-counts of two paleosols documented follow composition, size, and roundness. And soil features are observed and interpreted in all seven thin sections. Two paleosol samples are highly calcified and hematitized. In the thin sections, soil texture such as replacive fabric, displacive fabric, and vein filling calcite have been identified. The composition and texture indicate the paleoclimate during pedogenesis in this area are arid to semi-arid. The depositional environment is the fluvial environment. The rainfall capacity is less than water evaporation capacity in most of the time and the climate change from relative humid to semiarid or arid.
Research Category
Sciences
Presentation Type
Oral Presentation
Document Type
Presentation
Location
Carver Room
Presentation Date
11 Apr 2017, 10:40 am - 11:00 am
Petrographic Characteristics of Paleosols in Upper Daheyan Low-Order Cycle, Southern Bogda Mountains, Northwestern China
Carver Room
This research is petrographic characteristics study of paleosols in the upper Daheyan Low-order cycle, Taodonggou section, Southern Bogda Mountains, Northwestern China. Paleosols and calcitic nodules within the paleosols are petrographic studied to interpret paleoenvironment and paleoclimate during pedogenesis. 400 point-counts of two paleosols documented follow composition, size, and roundness. And soil features are observed and interpreted in all seven thin sections. Two paleosol samples are highly calcified and hematitized. In the thin sections, soil texture such as replacive fabric, displacive fabric, and vein filling calcite have been identified. The composition and texture indicate the paleoclimate during pedogenesis in this area are arid to semi-arid. The depositional environment is the fluvial environment. The rainfall capacity is less than water evaporation capacity in most of the time and the climate change from relative humid to semiarid or arid.
