Title

Petrographic Characteristics of Paleosols in Upper Daheyan Low-Order Cycle, Southern Bogda Mountains, Northwestern China

Presenter Information

Qiming Wang

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

Start Date

4-11-2017 10:40 AM

End Date

4-11-2017 11:00 AM

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Apr 11th, 10:40 AM Apr 11th, 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.