Mineral Distribution Characteristics of the Pengyang Uranium Deposit Based on Near Infrared Core Spectral Scanning Technology

ZHANG Bo; SI Qinghong; Miao Peisen; ZHAO Hualei; ZHU Qiang; CHEN Yin; CHEN Lulu

doi:10.15898/j.cnki.11-2131/td.202112130202

2022 Vol. 41, No. 5

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ZHANG Bo, SI Qinghong, Miao Peisen, ZHAO Hualei, ZHU Qiang, CHEN Yin, CHEN Lulu. Mineral Distribution Characteristics of the Pengyang Uranium Deposit Based on Near Infrared Core Spectral Scanning Technology[J]. Rock and Mineral Analysis, 2022, 41(5): 733-743. doi: 10.15898/j.cnki.11-2131/td.202112130202

Citation:

ZHANG Bo, SI Qinghong, Miao Peisen, ZHAO Hualei, ZHU Qiang, CHEN Yin, CHEN Lulu. Mineral Distribution Characteristics of the Pengyang Uranium Deposit Based on Near Infrared Core Spectral Scanning Technology[J]. Rock and Mineral Analysis, 2022, 41(5): 733-743. doi: 10.15898/j.cnki.11-2131/td.202112130202

Mineral Distribution Characteristics of the Pengyang Uranium Deposit Based on Near Infrared Core Spectral Scanning Technology

1.
Tianjin Center, China Geological Survey, Tianjin 300170, China
2.
Key Laboratory of Uranium Geology, China Geological Survey, Tianjin 300170, China

More Information

Corresponding author: SI Qinghong, sqinghongcgs@163.com

Received Date: 13 December 2021

Revised Date: 20 April 2022

Accepted Date: 30 April 2022

Publish Date: 28 September 2022

Abstract

Abstract

BACKGROUND
As an epigenetic deposit dominated by supergene fluid, a sandstone type uranium deposit has many low-temperature minerals. In recent years, the Pengyang uranium deposit, a deep sandstone type uranium deposit, has been discovered in the southwest edge of the Ordos Basin, China. The deposit has the characteristics of large sand body scale, wide uranium mineralization area, large thickness and high grade. Many low-temperature altered minerals have developed, including calcite, gypsum, pyrite, and clay minerals. It is of great significance to study the spatial distribution characteristics of minerals and their relationship with uranium minerals to identify the main sources and properties of ore-forming fluids and their controlling on uranium mineralization. Near-infrared core spectral scanning technology can identify layered silicate minerals such as kaolinite, montmorillonite, sericite, and sulfate minerals such as gypsum and alunite, and carbonate minerals such as calcite and dolomite.
OBJECTIVES
To study the distribution characteristics of minerals and their relationship with uranium mineralization.
METHODS
Core samples were scanned by VNIR-SWIR spectroscopy core scanning system and analyzed by TSG 8.0. In addition, the microscopic occurrence characteristics of minerals related to uranium minerals were observed by scanning electron microscopy.
RESULTS
Minerals such as kaolinite, montmorillonite, illite, chlorite, carbonate, gypsum, and iron oxide were identified in the Luohe Formation. The mineral assemblage of uranium ore section was "illite+gypsum+carbonate", and minor kaolinite was present locally.
CONCLUSIONS
The uranium-bearing section of the Luohe Formation is mainly a set of alkaline environments in the sedimentary period. However, there is also an injection of reducing acid fluid in the metallogenic period.
- sandstone type uranium ore /
- Pengyang uranium deposit /
- near infrared spectrum scanning /
- reflection spectrum /
- scanning electron microscope

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References

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