Origin and Geochronology of Chang'anpu Mo-Cu Deposit in Jilin Province: Constraints from Molybdenite Re-Os Isotope Systematics

Quan-heng SONG; Shu-wen XING; Yong ZHANG; Chao LI; Yan WANG; Cheng YU

doi:10.15898/j.cnki.11-2131/td.2016.05.014

2016 Vol. 35, No. 5

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Quan-heng SONG, Shu-wen XING, Yong ZHANG, Chao LI, Yan WANG, Cheng YU. Origin and Geochronology of Chang'anpu Mo-Cu Deposit in Jilin Province: Constraints from Molybdenite Re-Os Isotope Systematics[J]. Rock and Mineral Analysis, 2016, 35(5): 550-557. doi: 10.15898/j.cnki.11-2131/td.2016.05.014

Citation:

Quan-heng SONG, Shu-wen XING, Yong ZHANG, Chao LI, Yan WANG, Cheng YU. Origin and Geochronology of Chang'anpu Mo-Cu Deposit in Jilin Province: Constraints from Molybdenite Re-Os Isotope Systematics[J]. Rock and Mineral Analysis, 2016, 35(5): 550-557. doi: 10.15898/j.cnki.11-2131/td.2016.05.014

Origin and Geochronology of Chang'anpu Mo-Cu Deposit in Jilin Province: Constraints from Molybdenite Re-Os Isotope Systematics

1.
Institute of Geological Survey of Jilin Province, Changchun 130061, China
2.
China Geological Survey, Beijing 100037, China
3.
Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Land and Resources, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
4.
National Research Center for Geoanalysis, Beijing 100037, China

More Information

Corresponding author: Yong ZHANG, yongzhangcc@163.com

Received Date: 29 July 2016

Revised Date: 30 August 2016

Accepted Date: 15 September 2016

Abstract

Abstract

The east-central part of Jilin Province, located on the continental margin of northeast China along the eastern Xing-Meng orogenic belt, hosts more than 10 large-and medium-scale Mo deposits. The major types of mineralization include porphyry, skarn, and quartz vein types. The Chang'anpu Mo-Cu deposit is a newly discovered large-scale porphyry deposit in central Jilin Province; the age of mineralization is unknown. The geological characteristics of the deposit were investigated and molybdenite Re-Os isotope dating was applied, to constrain the age of mineralization. The molybdenite Re-Os model ages range from 167.3±2.4 to 168.7±2.4 Ma with a weighted mean model age of 168.0±1.0 Ma. The isochron age is 168.0±6.2 Ma, which indicates that the Chang'anpu Mo-Cu deposit was formed in the Middle Jurassic, belonging to the large-scale Yanshanian molybdenum metallogenic period of North China. The Re content of the molybdenite varies from 25.17 to 34.80 μg/g, suggesting that the ore-forming materials may come from a crust-mantle mixed source and mainly from the crustal source. Combining published molybdenite Re-Os and zircon U-Pb ages in east-central Jilin Province, suggests that the Mo mineralization occurred in the Early-Middle Jurassic (167-196 Ma), thereby providing a scientific basis for Mo resources prospecting in Jilin.
- molybdenite /
- Re-Os isotopic dating /
- middle Jurassic /
- Chang'anpu Mo-Cu deposit /
- central Jilin Province

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References

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