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Re-Os Isotopic Dating of Molybdenite from the Daheishan Molybdenum Deposit of Jilin Province and Its Geological Significance

Lijuan Ying

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Abstract

The Daheishan molybdenum deposit is a large-scale porphyry molybdenum deposit discovered in 1950s in Jilin Province. This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.2±3.2) Ma (MSWD=0.56). The results indicate that the deposit was formed in the early of Yanshanian period. The content of element Re from the molybdenite and S isotope composition from the pyrites show that the ore-forming materials may come from mixed crustal and mantle sources.

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What this paper is about

The Daheishan molybdenum deposit is a large-scale porphyry molybdenum deposit discovered in 1950s in Jilin Province. This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.2±3.2) Ma (MSWD=0.56). The results indicate that the deposit was formed in the early of Yanshanian period. The content of element Re from the molybdenite and S isotope composition from the pyrites show that the ore-forming materials may come from mixed crustal and mantle sources.

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Available abstract

The Daheishan molybdenum deposit is a large-scale porphyry molybdenum deposit discovered in 1950s in Jilin Province. This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.2±3.2) Ma (MSWD=0.56). The results indicate that the deposit was formed in the early of Yanshanian period. The content of element Re from the molybdenite and S isotope composition from the pyrites show that the ore-forming materials may come from mixed crustal and mantle sources.

Key concepts: Molybdenite, Isochron, Molybdenum, Geochemistry, Geology, Radiometric dating, Isotope, Mineralogy

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Re-Os Isotopic Dating of Molybdenite from the Daheishan Molybdenum Deposit of Jilin Province and Its Geological Significance — Research Paper | ScholarLens