Typomorphic characteristics of pyrites in the Pangjiahe gold deposit, Shaanxi Province and indication for deep ore prospecting

LU Fei; LÜ Xinbiao; YANG Shuai; XIAO Qiang; LI Jun; REN Long

doi:10.12029/gc20190715001

GEOLOGY IN CHINA > 2023 > 50(1): 277-288. > DOI: 10.12029/gc20190715001

LU Fei, LÜ Xinbiao, YANG Shuai, XIAO Qiang, LI Jun, REN Long. Typomorphic characteristics of pyrites in the Pangjiahe gold deposit, Shaanxi Province and indication for deep ore prospecting[J]. GEOLOGY IN CHINA, 2023, 50(1): 277-288. DOI: 10.12029/gc20190715001

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Typomorphic characteristics of pyrites in the Pangjiahe gold deposit, Shaanxi Province and indication for deep ore prospecting

1.
Brigade No.211 of Sino Shaanxi Nuclear Industry Group, Xi'an 710024, Shaanxi, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, Hubei, China
3.
Sino Shaanxi Nuclear Industry Group, Xi'an 710000, Shaanxi, China
4.
Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China

Funds:

the Shaanxi Geological Exploration Fund 61201304171

More Information

Author Bio:
LU Fei, male, born in 1985, master, senior engineer, engaged in geological and mineral exploration and research work; E-mail: 419571318@qq.com
Received Date: July 14, 2019
Revised Date: September 25, 2019
Available Online: September 25, 2023

Graphical Abstract

Abstract

Abstract

This paper is the result of mineral exploration engineering.
Objective
Pyrite is the most common metal mineral of the Pangjiahe gold deposit, and it is also the most important gold-bearing mineral. Its typomorphic characteristics contain abundant geological information.
Methods
This paper conducts systematic analysis and research by selecting the morphological typomorphic characteristic, pyroelectric typomorphic characteristics and compositional typomorphic characteristic of pyrite, which is newly discovered in IV- 2 ore body in the eastern part of the deposit.
Results
It is found that crystal morphology of pyrite is mainly cubic and pentagonal dodecahedron, characterized by high arsenic, iron deficiency and sulfur. The average value of Fe/(S+As) is 0.860, and the ratio of Co/Ni is mainly concentrated between 1 and 10.
Conclusions
The calculation shows that the deposit is formed in a shallow depth, medium-low temperature environment, and the ore-forming fluid has obvious metamorphic properties. The vertical variation of pyroelectricity and morphology of pyrite indicates that there is still potential for deep ore prospecting, and preliminary calculations indicate that there is still an extension of 186 m downward ore at elevation of 861 m.
- gold deposit,
- pyrite,
- typomorphic characteristics,
- deep prospecting,
- mineral exploration engineering,
- Pangjiahe,
- Shaanxi

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References (60)

References

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